| Name | Constituency | Party | Dates | Rebellions
(explain...) |
| Lord John [Missing last name for 41744] | Bassetlaw | Lab | (2017-2019) | 15.1% |
| Diane Abbott | Hackney North and Stoke Newington | whilst Independent | (2023-2024) | n/a |
| Diane Abbott | Hackney North and Stoke Newington | Lab | (1997-2001) | 4.3% |
| Diane Abbott | Hackney North and Stoke Newington | Lab | (2001-2005) | 12.0% |
| Diane Abbott | Hackney North and Stoke Newington | Lab | (2005-2010) | 7.8% |
| Diane Abbott | Hackney North and Stoke Newington | Lab | (2010-2015) | 1.2% |
| Diane Abbott | Hackney North and Stoke Newington | Lab | (2015-2017) | 0.7% |
| Diane Abbott | Hackney North and Stoke Newington | Lab | (2017-2019) | 0.3% |
| Diane Abbott | Hackney North and Stoke Newington | whilst Lab | (2019-2023) | 0.4% |
| Diane Abbott | Hackney North and Stoke Newington | whilst Lab | (2024-2024) | n/a |
| Diane Abbott | Hackney North and Stoke Newington | Lab | (2024-present) | 7.1% |
| Jack Abbott | Ipswich | Lab | (2024-present) | 1.1% |
| Lord Aberdare | (Lords) | Con | (1958-2005) | 0.0% |
| Lord Aberdare | (Lords) | Crossbench | (2009-present) | 24.8% |
| Debbie Abrahams | Oldham East and Saddleworth | Lab | (2011-2015) | 0.1% |
| Debbie Abrahams | Oldham East and Saddleworth | Lab | (2015-2017) | 0.3% |
| Debbie Abrahams | Oldham East and Saddleworth | Lab | (2017-2019) | 0.3% |
| Debbie Abrahams | Oldham East and Saddleworth | Lab | (2019-2024) | 0.0% |
| Debbie Abrahams | Oldham East and Saddleworth | Lab | (2024-present) | 1.3% |
| Lord Ackner | (Lords) | Crossbench | (1986-2006) | 14.7% |
| Lord Acton | (Lords) | Lab | (2000-2010) | 1.5% |
| Adam Ingram | Carrick, Cumnock and Doon Valley | SNP | (2011-2016) | n/a |
| Adam Tomkins | Glasgow | Con | (2016-2021) | n/a |
| Adam Ingram | South of Scotland | SNP | (2003-2007) | 1.2% |
| Adam Ingram | South of Scotland | SNP | (1999-2003) | 1.6% |
| Adam Ingram | South of Scotland | SNP | (2007-2011) | 0.0% |
| Baroness Adams of Craigielea | (Lords) | Lab | (2005-present) | 0.6% |
| Gerry Adams | Belfast West | SF | (1997-2001) | n/a |
| Gerry Adams | Belfast West | SF | (2001-2005) | n/a |
| Gerry Adams | Belfast West | SF | (2005-2010) | n/a |
| Gerry Adams | Belfast West | SF | (2010-2011) | n/a |
| Shockat Adam | Leicester South | Independent | (2024-present) | n/a |
| Mrs Irene Adams | Paisley North | Lab | (1997-2001) | 1.0% |
| Mrs Irene Adams | Paisley North | Lab | (2001-2005) | 1.7% |
| Nigel Adams | Selby and Ainsty | Con | (2010-2015) | 0.7% |
| Nigel Adams | Selby and Ainsty | Con | (2015-2017) | 0.5% |
| Nigel Adams | Selby and Ainsty | Con | (2017-2019) | 0.5% |
| Nigel Adams | Selby and Ainsty | Con | (2019-2023) | 0.0% |
| Lord Addington | (Lords) | LDem | (1982-present) | 0.6% |
| Lord Adebowale | (Lords) | Crossbench | (2001-present) | 23.1% |
| Lord Adonis | (Lords) | Lab | (2005-present) | 1.3% |
| Bim Afolami | Hitchin and Harpenden | Con | (2017-2019) | 1.4% |
| Bim Afolami | Hitchin and Harpenden | Con | (2019-2024) | 0.0% |
| Adam Afriyie | Windsor | Con | (2005-2010) | 1.1% |
| Adam Afriyie | Windsor | Con | (2010-2015) | 1.6% |
| Adam Afriyie | Windsor | Con | (2015-2017) | 1.0% |
| Adam Afriyie | Windsor | Con | (2017-2019) | 3.1% |
| Adam Afriyie | Windsor | Con | (2019-2024) | 1.8% |
| Baroness Afshar | (Lords) | Crossbench | (2007-2022) | 45.3% |
| Lord Agnew of Oulton | (Lords) | Con | (2017-present) | 1.7% |
| Lord Ahmad of Wimbledon | (Lords) | Con | (2011-present) | 0.4% |
| Lord Ahmed | (Lords) | Lab | (1998-2009) | 5.1% |
| Lord Ahmed | (Lords) | Lab | (2009-2013) | n/a |
| Lord Ahmed | (Lords) | Non-affiliated | (2013-2020) | 4.7% |
| Lord Ahmed | (Lords) | Other | (2009-2009) | n/a |
| Tasmina Ahmed-Sheikh | Ochil and South Perthshire | SNP | (2015-2017) | 0.0% |
| Zubir Ahmed | Glasgow South West | Lab | (2024-present) | 1.8% |
| Nickie Aiken | Cities of London and Westminster | Con | (2019-2024) | 0.3% |
| Aileen Campbell | Clydesdale | SNP | (2011-2016) | n/a |
| Aileen Campbell | Clydesdale | SNP | (2016-2021) | n/a |
| Aileen Campbell | South of Scotland | SNP | (2007-2011) | 0.0% |
| Aileen McLeod | South Scotland | SNP | (2011-2016) | n/a |
| Nick Ainger | Carmarthen West and South Pembrokeshire | Lab | (1997-2001) | 0.2% |
| Nick Ainger | Carmarthen West and South Pembrokeshire | Lab | (2005-2010) | 0.6% |
| Nick Ainger | Carmarthen West and South Pembrokeshire | Lab | (2001-2005) | 1.0% |
| Bob Ainsworth | Coventry North East | Lab | (1997-2001) | 0.2% |
| Bob Ainsworth | Coventry North East | Lab | (2001-2005) | 0.4% |
| Bob Ainsworth | Coventry North East | Lab | (2005-2010) | 0.3% |
| Bob Ainsworth | Coventry North East | Lab | (2010-2015) | 0.1% |
| Peter Ainsworth | East Surrey | Con | (1997-2001) | 0.0% |
| Peter Ainsworth | East Surrey | Con | (2001-2005) | 0.6% |
| Peter Ainsworth | East Surrey | Con | (2005-2010) | 0.6% |
| Luke Akehurst | North Durham | Lab | (2024-present) | 0.0% |
| Sadik Al-Hassan | North Somerset | Lab | (2024-present) | 0.0% |
| Bayo Alaba | Southend East and Rochford | Lab | (2024-present) | 2.2% |
| Alasdair Morgan | Galloway and Upper Nithsdale | SNP | (1999-2003) | 2.1% |
| Alasdair Allan | Na h-Eileanan an Iar | SNP | (2011-2016) | n/a |
| Alasdair Allan | Na h-Eileanan an Iar | SNP | (2016-2021) | n/a |
| Alasdair Allan | Na h-Eileanan an Iar | SNP | (2021-present) | n/a |
| Alasdair Morgan | South of Scotland | SNP | (2003-2007) | 1.2% |
| Alasdair Morgan | South of Scotland | SNP | (2007-2011) | 0.2% |
| Alasdair Morrison | Western Isles | Lab | (2003-2007) | 0.7% |
| Alasdair Morrison | Western Isles | Lab | (1999-2003) | 0.5% |
| Alasdair Allan | Western Isles | SNP | (2007-2011) | 0.2% |
| Lord Alderdice | (Lords) | LDem | (1996-present) | 0.6% |
| Lord Aldington | (Lords) | Con | (1962-2000) | 0.0% |
| Peter Aldous | Waveney | Con | (2010-2015) | 1.9% |
| Peter Aldous | Waveney | Con | (2015-2017) | 0.0% |
| Peter Aldous | Waveney | Con | (2017-2019) | 1.6% |
| Peter Aldous | Waveney | Con | (2019-2024) | 1.9% |
| Dan Aldridge | Weston-super-Mare | Lab | (2024-present) | 0.0% |
| Alex Salmond | Aberdeenshire East | SNP | (2011-2016) | n/a |
| Alex Neil | Airdrie and Shotts | SNP | (2011-2016) | n/a |
| Alex Neil | Airdrie and Shotts | SNP | (2016-2021) | n/a |
| Alex Salmond | Banff and Buchan | SNP | (1999-2001) | 0.3% |
| Alex Neil | Central Scotland | SNP | (2003-2007) | 0.9% |
| Alex Neil | Central Scotland | SNP | (1999-2003) | 2.2% |
| Alex Neil | Central Scotland | SNP | (2007-2011) | 0.2% |
| Alex Rowley | Cowdenbeath | Lab | (2014-2016) | n/a |
| Alex Cole-Hamilton | Edinburgh Western | LDem | (2016-2021) | n/a |
| Alex Cole-Hamilton | Edinburgh Western | LDem | (2021-present) | n/a |
| Alex Fergusson | Galloway and Upper Nithsdale | Con | (2003-2007) | 1.8% |
| Alex Fergusson | Galloway and Upper Nithsdale | None | (2007-2007) | n/a |
| Alex Fergusson | Galloway and Upper Nithsdale | None | (2007-2011) | n/a |
| Alex Fergusson | Galloway and West Dumfries | Con | (2011-2016) | n/a |
| Alex Salmond | Gordon | SNP | (2007-2011) | 0.0% |
| Alex Rowley | Mid Scotland and Fife | Lab | (2016-2021) | n/a |
| Alex Rowley | Mid Scotland and Fife | Lab | (2021-present) | n/a |
| Alex Johnstone | North East Scotland | Con | (2011-2016) | n/a |
| Alex Johnstone | North East Scotland | Con | (2003-2007) | 0.5% |
| Alex Johnstone | North East Scotland | Con | (1999-2003) | 0.3% |
| Alex Johnstone | North East Scotland | Con | (2007-2011) | 0.2% |
| Alex Johnstone | North East Scotland | Con | (2016-2016) | n/a |
| Alex Fergusson | South of Scotland | Con | (1999-2003) | 0.5% |
| Alexander Burnett | Aberdeenshire West | Con | (2016-2021) | n/a |
| Alexander Burnett | Aberdeenshire West | Con | (2021-present) | n/a |
| Alexander Stewart | Mid Scotland and Fife | Con | (2016-2021) | n/a |
| Alexander Stewart | Mid Scotland and Fife | Con | (2021-present) | n/a |
| Danny Alexander | Inverness, Nairn, Badenoch and Strathspey | LDem | (2005-2010) | 1.3% |
| Danny Alexander | Inverness, Nairn, Badenoch and Strathspey | LDem | (2010-2015) | 0.6% |
| Douglas Alexander | Lothian East | Lab | (2024-present) | 0.0% |
| Douglas Alexander | Paisley and Renfrewshire South | Lab | (2005-2010) | 0.4% |
| Douglas Alexander | Paisley and Renfrewshire South | Lab | (2010-2015) | 0.0% |
| Douglas Alexander | Paisley South | Lab | (1997-2001) | 0.0% |
| Douglas Alexander | Paisley South | Lab | (2001-2005) | 0.4% |
| Heidi Alexander | Lewisham East | Lab | (2010-2015) | 0.3% |
| Heidi Alexander | Lewisham East | Lab | (2015-2017) | 2.1% |
| Heidi Alexander | Lewisham East | Lab | (2017-2018) | 0.8% |
| Heidi Alexander | Swindon South | Lab | (2024-present) | 0.0% |
| Lord Alexander of Weedon | (Lords) | Con | (1988-2005) | 15.7% |
| Rushanara Ali | Bethnal Green and Bow | Lab | (2010-2015) | 0.1% |
| Rushanara Ali | Bethnal Green and Bow | Lab | (2015-2017) | 2.2% |
| Rushanara Ali | Bethnal Green and Bow | Lab | (2017-2019) | 0.3% |
| Rushanara Ali | Bethnal Green and Bow | Lab | (2019-2024) | 0.0% |
| Rushanara Ali | Bethnal Green and Stepney | Lab | (2024-present) | 2.0% |
| Alison Harris | Central Scotland | Con | (2016-2021) | n/a |
| Alison Johnstone | Lothian | Green | (2011-2016) | n/a |
| Alison Johnstone | Lothian | Green | (2016-2021) | n/a |
| Alison Johnstone | Lothian | Green | (2021-present) | n/a |
| Alison McInnes | North East Scotland | LDem | (2011-2016) | n/a |
| Alison McInnes | North East Scotland | LDem | (2007-2011) | 0.3% |
| Tahir Ali | Birmingham Hall Green and Moseley | Lab | (2024-present) | 0.6% |
| Tahir Ali | Birmingham, Hall Green | Lab | (2019-2024) | 0.0% |
| Allan Wilson | Cunninghame North | Lab | (2003-2007) | 0.1% |
| Allan Wilson | Cunninghame North | Lab | (1999-2003) | 0.7% |
| Lord Allan of Hallam | (Lords) | LDem | (2010-present) | 0.7% |
| Lucy Allan | Telford | Con | (2015-2017) | 0.2% |
| Lucy Allan | Telford | Con | (2017-2019) | 1.0% |
| Lucy Allan | Telford | whilst Con | (2019-2024) | 0.3% |
| Lucy Allan | Telford | whilst Independent | (2024-2024) | n/a |
| Mr Richard Allan | Sheffield, Hallam | LDem | (2001-2005) | 1.6% |
| Mr Richard Allan | Sheffield, Hallam | LDem | (1997-2001) | 1.5% |
| Lord Allen of Abbeydale | (Lords) | Crossbench | (1976-2007) | 37.5% |
| Viscount Allenby of Megiddo | (Lords) | Crossbench | (1984-2014) | 21.0% |
| Graham Allen | Nottingham North | Lab | (1997-2001) | 0.7% |
| Graham Allen | Nottingham North | Lab | (2001-2005) | 1.7% |
| Graham Allen | Nottingham North | Lab | (2005-2010) | 1.4% |
| Graham Allen | Nottingham North | Lab | (2010-2015) | 2.1% |
| Graham Allen | Nottingham North | Lab | (2015-2017) | 2.4% |
| Heidi Allen | South Cambridgeshire | Con | (2015-2017) | 1.8% |
| Heidi Allen | South Cambridgeshire | whilst Con | (2017-2019) | 5.9% |
| Heidi Allen | South Cambridgeshire | whilst Independent | (2019-2019) | n/a |
| Lord Allen of Kensington | (Lords) | Lab | (2013-present) | 0.0% |
| Lord Alli | (Lords) | Lab | (1998-present) | 0.8% |
| Lord Alliance | (Lords) | LDem | (2004-present) | 2.8% |
| Rosena Allin-Khan | Tooting | Lab | (2016-2017) | 1.7% |
| Rosena Allin-Khan | Tooting | Lab | (2017-2019) | 0.6% |
| Rosena Allin-Khan | Tooting | Lab | (2019-2024) | 0.0% |
| Rosena Allin-Khan | Tooting | Lab | (2024-present) | 3.4% |
| Jim Allister | North Antrim | Traditional Unionist Voice | (2024-present) | 0.0% |
| Baroness Altmann | (Lords) | Con | (2015-present) | 16.7% |
| Lord Alton of Liverpool | (Lords) | Crossbench | (1997-present) | 25.0% |
| Lord Altrincham | (Lords) | Con | (2021-present) | 0.0% |
| Mike Amesbury | Runcorn and Helsby | Lab | (2024-present) | 1.4% |
| Mike Amesbury | Weaver Vale | Lab | (2017-2019) | 0.3% |
| Mike Amesbury | Weaver Vale | Lab | (2019-2024) | 0.0% |
| Sir David Amess | Southend West | Con | (1997-2001) | 0.9% |
| Sir David Amess | Southend West | Con | (2001-2005) | 3.0% |
| Sir David Amess | Southend West | Con | (2005-2010) | 1.6% |
| Sir David Amess | Southend West | Con | (2010-2015) | 2.4% |
| Sir David Amess | Southend West | Con | (2015-2017) | 0.3% |
| Sir David Amess | Southend West | Con | (2017-2019) | 3.4% |
| Sir David Amess | Southend West | Con | (2019-2021) | 5.0% |
| Baroness Amos | (Lords) | Lab | (1997-2009) | 0.9% |
| Baroness Amos | (Lords) | Lab | (2018-present) | 0.0% |
| Baroness Amos | (Lords) | Non-affiliated | (2009-2018) | n/a |
| Gideon Amos | Taunton and Wellington | LDem | (2024-present) | 3.7% |
| Lord Ampthill | (Lords) | Crossbench | (1973-2011) | 23.3% |
| Anas Sarwar | Glasgow | Lab | (2016-2021) | n/a |
| Anas Sarwar | Glasgow | Lab | (2021-present) | n/a |
| Michael Ancram | Devizes | Con | (2001-2005) | 0.2% |
| Michael Ancram | Devizes | Con | (1997-2001) | 0.2% |
| Michael Ancram | Devizes | Con | (2005-2010) | 0.6% |
| Callum Anderson | Buckingham and Bletchley | Lab | (2024-present) | 0.0% |
| David Anderson | Blaydon | Lab | (2005-2010) | 0.7% |
| David Anderson | Blaydon | Lab | (2010-2015) | 0.7% |
| David Anderson | Blaydon | Lab | (2015-2017) | 0.4% |
| Mr Donald Anderson | Swansea East | Lab | (1997-2001) | 2.0% |
| Mr Donald Anderson | Swansea East | Lab | (2001-2005) | 0.9% |
| Fleur Anderson | Putney | Lab | (2019-2024) | 0.0% |
| Fleur Anderson | Putney | Lab | (2024-present) | 2.2% |
| Lord Anderson of Ipswich | (Lords) | Crossbench | (2018-present) | 15.6% |
| Janet Anderson | Rossendale and Darwen | Lab | (1997-2001) | 0.0% |
| Janet Anderson | Rossendale and Darwen | Lab | (2001-2005) | 1.1% |
| Janet Anderson | Rossendale and Darwen | Lab | (2005-2010) | 0.9% |
| Lee Anderson | Ashfield | whilst Con | (2019-2024) | 1.0% |
| Lee Anderson | Ashfield | whilst Reform UK | (2024-2024) | 0.0% |
| Lee Anderson | Ashfield | Reform UK | (2024-present) | 0.0% |
| Baroness Anderson of Stoke-on-Trent | (Lords) | Lab | (2022-present) | 0.0% |
| Stuart Anderson | South Shropshire | Con | (2024-present) | 0.0% |
| Stuart Anderson | Wolverhampton South West | Con | (2019-2024) | 0.3% |
| Lord Anderson of Swansea | (Lords) | Lab | (2005-present) | 1.0% |
| Andrew Welsh | Angus | SNP | (2003-2007) | 1.1% |
| Andrew Welsh | Angus | SNP | (1999-2003) | 2.6% |
| Andrew Welsh | Angus | SNP | (2007-2011) | 0.0% |
| Andrew Wilson | Central Scotland | SNP | (1999-2003) | 2.8% |
| Mr Andrew Arbuckle | Mid Scotland and Fife | LDem | (2005-2007) | 0.4% |
| Baroness Andrews | (Lords) | Lab | (2000-present) | 0.5% |
| Stuart Andrew | Daventry | Con | (2024-present) | 0.0% |
| Stuart Andrew | Pudsey | Con | (2010-2015) | 1.3% |
| Stuart Andrew | Pudsey | Con | (2015-2017) | 0.0% |
| Stuart Andrew | Pudsey | Con | (2017-2019) | 0.9% |
| Stuart Andrew | Pudsey | Con | (2019-2024) | 0.1% |
| Andy Kerr | East Kilbride | Lab | (2003-2007) | 0.2% |
| Andy Kerr | East Kilbride | Lab | (1999-2003) | 0.1% |
| Andy Kerr | East Kilbride | Lab | (2007-2011) | 0.7% |
| Andy Wightman | Lothian | whilst Green | (2016-2020) | n/a |
| Andy Wightman | Lothian | whilst Independent | (2020-2021) | n/a |
| Baroness Anelay of St Johns | (Lords) | Con | (1996-present) | 0.4% |
| Angela Constance | Almond Valley | SNP | (2011-2016) | n/a |
| Angela Constance | Almond Valley | SNP | (2016-2021) | n/a |
| Angela Constance | Almond Valley | SNP | (2021-present) | n/a |
| Angela Constance | Livingston | SNP | (2007-2011) | 0.7% |
| Angus Robertson | Edinburgh Central | SNP | (2021-present) | n/a |
| Angus MacKay | Edinburgh South | Lab | (1999-2003) | 0.5% |
| Angus MacDonald | Falkirk East | SNP | (2011-2016) | n/a |
| Angus MacDonald | Falkirk East | SNP | (2016-2021) | n/a |
| Annabel Goldie | West of Scotland | Con | (1999-2003) | 0.4% |
| Annabel Goldie | West of Scotland | Con | (2003-2007) | 0.4% |
| Annabel Goldie | West of Scotland | Con | (2007-2011) | 0.4% |
| Baroness Annabel MacNicoll [Missing last name for 80537] | West Scotland | Con | (2011-2016) | n/a |
| Annabelle Ewing | Cowdenbeath | SNP | (2016-2021) | n/a |
| Annabelle Ewing | Cowdenbeath | SNP | (2021-present) | n/a |
| Annabelle Ewing | Mid Scotland and Fife | SNP | (2011-2016) | n/a |
| Lord Annan | (Lords) | Crossbench | (1965-2000) | 100.0% |
| Anne McTaggart | Glasgow | Lab | (2011-2016) | n/a |
| Anne McLaughlin | Glasgow | SNP | (2009-2011) | 0.0% |
| Annie Wells | Glasgow | Con | (2016-2021) | n/a |
| Annie Wells | Glasgow | Con | (2021-present) | n/a |
| Caroline Ansell | Eastbourne | Con | (2015-2017) | 0.2% |
| Caroline Ansell | Eastbourne | Con | (2019-2024) | 0.9% |
| Tonia Antoniazzi | Gower | Lab | (2017-2019) | 0.5% |
| Tonia Antoniazzi | Gower | Lab | (2019-2024) | 0.0% |
| Tonia Antoniazzi | Gower | Lab | (2024-present) | 0.0% |
| Steffan Aquarone | North Norfolk | LDem | (2024-present) | 0.0% |
| Lord Arbuthnot of Edrom | (Lords) | Con | (2015-present) | 6.5% |
| James Arbuthnot | North East Hampshire | Con | (1997-2001) | 0.5% |
| James Arbuthnot | North East Hampshire | Con | (2001-2005) | 1.3% |
| James Arbuthnot | North East Hampshire | Con | (2005-2010) | 1.9% |
| James Arbuthnot | North East Hampshire | Con | (2010-2015) | 0.2% |
| Lord Archer of Sandwell | (Lords) | Lab | (1992-2012) | 0.7% |
| Lord Archer of Weston-Super-Mare | (Lords) | Con | (1992-1999) | n/a |
| Lord Archer of Weston-Super-Mare | (Lords) | Non-affiliated | (1999-2024) | 100.0% |
| Edward Argar | Charnwood | Con | (2015-2017) | 0.0% |
| Edward Argar | Charnwood | Con | (2017-2019) | 0.5% |
| Edward Argar | Charnwood | Con | (2019-2024) | 0.0% |
| Edward Argar | Melton and Syston | Con | (2024-present) | 0.0% |
| Ariane Burgess | Highlands and Islands | Green | (2021-present) | n/a |
| Richard Arkless | Dumfries and Galloway | SNP | (2015-2017) | 0.4% |
| Hilary Armstrong | North West Durham | Lab | (2005-2010) | 0.6% |
| Hilary Armstrong | North West Durham | Lab | (2001-2005) | 0.6% |
| Hilary Armstrong | North West Durham | Lab | (1997-2001) | 0.5% |
| Baroness Armstrong of Hill Top | (Lords) | Lab | (2010-present) | 0.3% |
| Lord Armstrong of Ilminster | (Lords) | Crossbench | (1988-2020) | 29.7% |
| The Earl of Arran | (Lords) | Con | (1983-present) | 1.5% |
| Scott Arthur | Edinburgh South West | Lab | (2024-present) | 1.7% |
| Jessica Asato | Lowestoft | Lab | (2024-present) | 2.5% |
| Ash Denham | Edinburgh Eastern | SNP | (2016-2021) | n/a |
| Ash Denham | Edinburgh Eastern | SNP | (2021-present) | n/a |
| Lord Ashcombe | (Lords) | Con | (2022-present) | 0.0% |
| Lord Ashcroft | (Lords) | Con | (2000-2015) | 1.4% |
| Lord Ashdown of Norton-sub-Hamdon | (Lords) | LDem | (2001-2018) | 0.9% |
| Mr Paddy Ashdown | Yeovil | LDem | (1997-2001) | 1.3% |
| Lord Ashley of Stoke | (Lords) | Lab | (1992-2012) | 1.6% |
| Lord Ashton of Hyde | (Lords) | Con | (2011-present) | 0.2% |
| Mr Joe Ashton | Bassetlaw | Lab | (1997-2001) | 1.6% |
| Baroness Ashton of Upholland | (Lords) | Lab | (1999-2008) | 0.0% |
| Baroness Ashton of Upholland | (Lords) | Non-affiliated | (2008-present) | 7.1% |
| Baroness Ashton of Upholland | (Lords) | Other | (1999-1999) | n/a |
| Jon Ashworth | Leicester South | Lab | (2011-2015) | 0.1% |
| Jon Ashworth | Leicester South | Lab | (2015-2017) | 0.0% |
| Jon Ashworth | Leicester South | Lab | (2017-2019) | 0.0% |
| Jon Ashworth | Leicester South | Lab | (2019-2024) | 0.0% |
| James Asser | West Ham and Beckton | Lab | (2024-present) | 1.9% |
| Viscount Astor | (Lords) | Con | (1966-present) | 2.7% |
| Lord Astor of Hever | (Lords) | Con | (1984-2022) | 0.6% |
| Ms Candy Atherton | Falmouth and Camborne | Lab | (1997-2001) | 0.1% |
| Ms Candy Atherton | Falmouth and Camborne | Lab | (2001-2005) | 0.7% |
| Sarah Atherton | Wrexham | Con | (2019-2024) | 0.7% |
| Jas Athwal | Ilford South | Lab | (2024-present) | 0.5% |
| Charlotte Atkins | Staffordshire Moorlands | Lab | (1997-2001) | 0.4% |
| Charlotte Atkins | Staffordshire Moorlands | Lab | (2001-2005) | 0.6% |
| Charlotte Atkins | Staffordshire Moorlands | Lab | (2005-2010) | 0.2% |
| Catherine Atkinson | Derby North | Lab | (2024-present) | 1.8% |
| Mr David Atkinson | Bournemouth East | Con | (1997-2001) | 3.5% |
| Mr David Atkinson | Bournemouth East | Con | (2001-2005) | 1.5% |
| Lewis Atkinson | Sunderland Central | Lab | (2024-present) | 0.0% |
| Peter Atkinson | Hexham | Con | (1997-2001) | 0.7% |
| Peter Atkinson | Hexham | Con | (2001-2005) | 1.4% |
| Peter Atkinson | Hexham | Con | (2005-2010) | 1.8% |
| Victoria Atkins | Louth and Horncastle | Con | (2015-2017) | 0.2% |
| Victoria Atkins | Louth and Horncastle | Con | (2017-2019) | 1.4% |
| Victoria Atkins | Louth and Horncastle | Con | (2019-2024) | 0.2% |
| Victoria Atkins | Louth and Horncastle | Con | (2024-present) | 1.7% |
| Lord Attenborough | (Lords) | Lab | (1993-2012) | 0.0% |
| Lord Attenborough | (Lords) | Non-affiliated | (2012-2014) | n/a |
| Earl Attlee | (Lords) | Con | (1991-present) | 1.5% |
| Audrey Nicoll | Aberdeen South and North Kincardine | SNP | (2021-present) | n/a |
| Lord Austin of Dudley | (Lords) | Non-affiliated | (2020-present) | 21.3% |
| Ian Austin | Dudley North | whilst Independent | (2019-2019) | n/a |
| Ian Austin | Dudley North | Lab | (2005-2010) | 0.3% |
| Ian Austin | Dudley North | Lab | (2010-2015) | 0.5% |
| Ian Austin | Dudley North | Lab | (2015-2017) | 1.5% |
| Ian Austin | Dudley North | whilst Lab | (2017-2019) | 3.7% |
| John Austin | Erith and Thamesmead | Lab | (2005-2010) | 3.2% |
| John Austin | Erith and Thamesmead | Lab | (1997-2001) | 0.9% |
| John Austin | Erith and Thamesmead | Lab | (2001-2005) | 4.3% |
| Lord Avebury | (Lords) | LDem | (1971-2016) | 4.6% |
| Josh Babarinde | Eastbourne | LDem | (2024-present) | 1.5% |
| Lord Bach | (Lords) | Lab | (1998-present) | 0.4% |
| Gareth Bacon | Orpington | Con | (2019-2024) | 0.4% |
| Gareth Bacon | Orpington | Con | (2024-present) | 0.0% |
| Richard Bacon | South Norfolk | Con | (2001-2005) | 1.6% |
| Richard Bacon | South Norfolk | Con | (2005-2010) | 1.2% |
| Richard Bacon | South Norfolk | Con | (2010-2015) | 1.6% |
| Richard Bacon | South Norfolk | Con | (2015-2017) | 0.5% |
| Richard Bacon | South Norfolk | Con | (2017-2019) | 3.3% |
| Richard Bacon | South Norfolk | Con | (2019-2024) | 0.2% |
| Kemi Badenoch | North West Essex | Con | (2024-present) | 0.0% |
| Kemi Badenoch | Saffron Walden | Con | (2017-2019) | 0.2% |
| Kemi Badenoch | Saffron Walden | Con | (2019-2024) | 0.2% |
| Lord Bagri | (Lords) | Con | (1997-2010) | 4.9% |
| Adrian Bailey | West Bromwich West | Lab | (2000-2001) | 0.5% |
| Adrian Bailey | West Bromwich West | Lab | (2001-2005) | 0.8% |
| Adrian Bailey | West Bromwich West | Lab | (2005-2010) | 0.4% |
| Adrian Bailey | West Bromwich West | Lab | (2010-2015) | 0.9% |
| Adrian Bailey | West Bromwich West | Lab | (2015-2017) | 1.5% |
| Adrian Bailey | West Bromwich West | Lab | (2017-2019) | 0.8% |
| Calvin Bailey | Leyton and Wanstead | Lab | (2024-present) | 0.0% |
| Olivia Bailey | Reading West and Mid Berkshire | Lab | (2024-present) | 1.7% |
| Lord Bailey of Paddington | (Lords) | Con | (2023-present) | 0.0% |
| Shaun Bailey | West Bromwich West | Con | (2019-2024) | 0.5% |
| Siobhan Baillie | Stroud | Con | (2019-2024) | 0.7% |
| David Baines | St Helens North | Lab | (2024-present) | 2.7% |
| William Bain | Glasgow North East | Lab | (2010-2015) | 0.1% |
| William Bain | Glasgow North East | Lab | (2009-2010) | 0.0% |
| Vera Baird | Redcar | Lab | (2001-2005) | 0.9% |
| Vera Baird | Redcar | Lab | (2005-2010) | 0.6% |
| Alex Baker | Aldershot | Lab | (2024-present) | 1.9% |
| Lord Baker of Dorking | (Lords) | Con | (1997-present) | 3.4% |
| Duncan Baker | North Norfolk | Con | (2019-2024) | 0.0% |
| Norman Baker | Lewes | LDem | (1997-2001) | 1.1% |
| Norman Baker | Lewes | LDem | (2001-2005) | 1.2% |
| Norman Baker | Lewes | LDem | (2005-2010) | 1.7% |
| Norman Baker | Lewes | LDem | (2010-2015) | 0.7% |
| Richard Baker | Glenrothes and Mid Fife | Lab | (2024-present) | 1.6% |
| Steven Baker | Wycombe | Con | (2010-2015) | 5.3% |
| Steven Baker | Wycombe | Con | (2015-2017) | 1.7% |
| Steven Baker | Wycombe | Con | (2017-2019) | 3.4% |
| Steven Baker | Wycombe | Con | (2019-2024) | 2.9% |
| Baroness Bakewell | (Lords) | Lab | (2011-present) | 0.8% |
| Baroness Bakewell of Hardington Mandeville | (Lords) | LDem | (2013-present) | 0.2% |
| Tony Baldry | Banbury | Con | (1997-2001) | 0.3% |
| Tony Baldry | Banbury | Con | (2001-2005) | 1.0% |
| Tony Baldry | Banbury | Con | (2005-2010) | 3.0% |
| Tony Baldry | Banbury | Con | (2010-2015) | 0.1% |
| Earl Baldwin of Bewdley | (Lords) | Crossbench | (1976-2018) | 36.4% |
| Harriett Baldwin | West Worcestershire | Con | (2010-2015) | 0.9% |
| Harriett Baldwin | West Worcestershire | Con | (2015-2017) | 0.0% |
| Harriett Baldwin | West Worcestershire | Con | (2017-2019) | 0.2% |
| Harriett Baldwin | West Worcestershire | Con | (2019-2024) | 1.7% |
| Harriett Baldwin | West Worcestershire | Con | (2024-present) | 0.0% |
| Lord Balfe | (Lords) | Con | (2013-present) | 6.3% |
| Mrs Jackie Ballard | Taunton | LDem | (1997-2001) | 1.0% |
| Alex Ballinger | Halesowen | Lab | (2024-present) | 0.0% |
| Edward Balls | Morley and Outwood | Lab | (2010-2015) | 0.1% |
| Edward Balls | Normanton | Lab | (2005-2010) | 0.8% |
| Lord Ballyedmond | (Lords) | Con | (2007-2014) | n/a |
| Lord Ballyedmond | (Lords) | Crossbench | (2004-2007) | 25.0% |
| Lord Bamford | (Lords) | Con | (2013-2024) | 0.0% |
| Antonia Bance | Tipton and Wednesbury | Lab | (2024-present) | 2.1% |
| Gordon Banks | Ochil and South Perthshire | Lab | (2005-2010) | 0.5% |
| Gordon Banks | Ochil and South Perthshire | Lab | (2010-2015) | 0.3% |
| Mr Tony Banks | West Ham | Lab | (1997-2001) | 0.4% |
| Mr Tony Banks | West Ham | Lab | (2001-2005) | 1.8% |
| Lord Banner | (Lords) | Con | (2024-present) | 0.0% |
| Lord Bannside | (Lords) | DUP | (2010-2014) | 0.0% |
| Lord Barber | (Lords) | Con | (1975-2005) | 0.0% |
| Lord Barber of Tewkesbury | (Lords) | Crossbench | (1992-2016) | 12.5% |
| Steve Barclay | North East Cambridgeshire | Con | (2010-2015) | 1.3% |
| Steve Barclay | North East Cambridgeshire | Con | (2015-2017) | 0.0% |
| Steve Barclay | North East Cambridgeshire | Con | (2017-2019) | 0.0% |
| Steve Barclay | North East Cambridgeshire | Con | (2019-2024) | 0.1% |
| Steve Barclay | North East Cambridgeshire | Con | (2024-present) | 1.7% |
| Hannah Bardell | Livingston | SNP | (2015-2017) | 0.0% |
| Hannah Bardell | Livingston | SNP | (2017-2019) | 0.0% |
| Hannah Bardell | Livingston | SNP | (2019-2024) | 0.0% |
| Baroness Barker | (Lords) | LDem | (1999-present) | 0.6% |
| Lord Barker of Battle | (Lords) | Con | (2015-present) | 0.0% |
| Gregory Barker | Bexhill and Battle | Con | (2001-2005) | 0.4% |
| Gregory Barker | Bexhill and Battle | Con | (2005-2010) | 0.4% |
| Gregory Barker | Bexhill and Battle | Con | (2010-2015) | 0.6% |
| Paula Barker | Liverpool Wavertree | Lab | (2024-present) | 0.0% |
| Paula Barker | Liverpool, Wavertree | Lab | (2019-2024) | 0.1% |
| Celia Barlow | Hove | Lab | (2005-2010) | 0.5% |
| Mr Harry Barnes | North East Derbyshire | Lab | (1997-2001) | 5.4% |
| Mr Harry Barnes | North East Derbyshire | Lab | (2001-2005) | 11.4% |
| Lord Barnett | (Lords) | Lab | (1983-2014) | 2.2% |
| John Baron | Basildon and Billericay | Con | (2010-2015) | 6.0% |
| John Baron | Basildon and Billericay | Con | (2015-2017) | 2.2% |
| John Baron | Basildon and Billericay | Con | (2017-2019) | 2.4% |
| John Baron | Basildon and Billericay | Con | (2019-2024) | 2.7% |
| John Baron | Billericay | Con | (2001-2005) | 1.0% |
| John Baron | Billericay | Con | (2005-2010) | 1.1% |
| Baroness Barran | (Lords) | Con | (2018-present) | 0.1% |
| John Barrett | Edinburgh West | LDem | (2001-2005) | 2.0% |
| John Barrett | Edinburgh West | LDem | (2005-2010) | 1.3% |
| Kevin Barron | Rother Valley | Lab | (1997-2001) | 0.4% |
| Kevin Barron | Rother Valley | Lab | (2001-2005) | 1.2% |
| Kevin Barron | Rother Valley | Lab | (2005-2010) | 1.2% |
| Kevin Barron | Rother Valley | Lab | (2010-2015) | 0.4% |
| Kevin Barron | Rother Valley | Lab | (2015-2017) | 1.3% |
| Kevin Barron | Rother Valley | Lab | (2017-2019) | 10.7% |
| Lee Barron | Corby and East Northamptonshire | Lab | (2024-present) | 0.0% |
| Alex Barros-Curtis | Cardiff West | Lab | (2024-present) | 0.5% |
| Lord Barwell | (Lords) | Con | (2019-present) | 2.3% |
| Gavin Barwell | Croydon Central | Con | (2010-2015) | 0.3% |
| Gavin Barwell | Croydon Central | Con | (2015-2017) | 0.2% |
| Bashir Ahmad | Glasgow | SNP | (2007-2009) | 0.0% |
| Lord Bassam of Brighton | (Lords) | Lab | (1997-present) | 0.3% |
| Lord Bates | (Lords) | Con | (2008-present) | 0.4% |
| The Bishop of Bath and Wells | (Lords) | Bishop | (1997-2001) | 0.0% |
| The Bishop of Bath and Wells | (Lords) | Bishop | (2008-2013) | 7.5% |
| Baroness Batters | (Lords) | Crossbench | (2024-present) | 0.0% |
| John Battle | Leeds West | Lab | (1997-2001) | 0.0% |
| John Battle | Leeds West | Lab | (2001-2005) | 1.6% |
| John Battle | Leeds West | Lab | (2005-2010) | 1.5% |
| Lord Bauer | (Lords) | Con | (1983-2002) | n/a |
| Johanna Baxter | Paisley and Renfrewshire South | Lab | (2024-present) | 1.7% |
| Hugh Bayley | City of York | Lab | (1997-2001) | 0.2% |
| Hugh Bayley | City of York | Lab | (2001-2005) | 0.0% |
| Hugh Bayley | City of York | Lab | (2005-2010) | 1.2% |
| Hugh Bayley | York Central | Lab | (2010-2015) | 0.8% |
| Simon Baynes | Clwyd South | Con | (2019-2024) | 0.3% |
| Danny Beales | Uxbridge and South Ruislip | Lab | (2024-present) | 0.0% |
| Lord Beamish | (Lords) | Lab | (2024-present) | 0.0% |
| Mr Nigel Beard | Bexleyheath and Crayford | Lab | (1997-2001) | 0.9% |
| Mr Nigel Beard | Bexleyheath and Crayford | Lab | (2001-2005) | 0.7% |
| Beatrice Wishart | Shetland Islands | LDem | (2019-2021) | n/a |
| Beatrice Wishart | Shetland Islands | LDem | (2021-present) | n/a |
| Lord Beaumont of Whitley | (Lords) | Green | (1967-2008) | 0.0% |
| Lorraine Beavers | Blackpool North and Fleetwood | Lab | (2024-present) | 0.0% |
| Guto Bebb | Aberconwy | Con | (2010-2015) | 1.2% |
| Guto Bebb | Aberconwy | Con | (2015-2017) | 0.5% |
| Guto Bebb | Aberconwy | whilst Con | (2017-2019) | 12.5% |
| Guto Bebb | Aberconwy | whilst Independent | (2019-2019) | n/a |
| Baroness Beckett | (Lords) | Lab | (2024-present) | 0.0% |
| Margaret Beckett | Derby South | Lab | (1997-2001) | 0.8% |
| Margaret Beckett | Derby South | Lab | (2001-2005) | 0.7% |
| Margaret Beckett | Derby South | Lab | (2005-2010) | 0.7% |
| Margaret Beckett | Derby South | Lab | (2010-2015) | 0.4% |
| Margaret Beckett | Derby South | Lab | (2015-2017) | 1.1% |
| Margaret Beckett | Derby South | Lab | (2017-2019) | 1.2% |
| Margaret Beckett | Derby South | Lab | (2019-2024) | 0.0% |
| Peter Bedford | Mid Leicestershire | Con | (2024-present) | 3.0% |
| Lord Beecham | (Lords) | Lab | (2010-2021) | 0.8% |
| Anne Begg | Aberdeen South | Lab | (1997-2001) | 0.3% |
| Anne Begg | Aberdeen South | Lab | (2001-2005) | 1.3% |
| Anne Begg | Aberdeen South | Lab | (2005-2010) | 0.4% |
| Anne Begg | Aberdeen South | Lab | (2010-2015) | 0.6% |
| Mr Roy Beggs | East Antrim | UUP | (1997-2001) | 0.2% |
| Mr Roy Beggs | East Antrim | UUP | (2001-2005) | 0.6% |
| Órfhlaith Begley | West Tyrone | SF | (2018-2019) | n/a |
| Órfhlaith Begley | West Tyrone | SF | (2019-2024) | n/a |
| Órfhlaith Begley | West Tyrone | SF | (2024-present) | n/a |
| Apsana Begum | Poplar and Limehouse | whilst Independent | (2024-present) | n/a |
| Apsana Begum | Poplar and Limehouse | Lab | (2019-2024) | 0.5% |
| Apsana Begum | Poplar and Limehouse | whilst Lab | (2024-2024) | 25.0% |
| Lord Beith | (Lords) | LDem | (2015-present) | 0.7% |
| Alan Beith | Berwick-upon-Tweed | LDem | (1997-2001) | 3.0% |
| Alan Beith | Berwick-upon-Tweed | LDem | (2001-2005) | 3.2% |
| Alan Beith | Berwick-upon-Tweed | LDem | (2005-2010) | 2.1% |
| Alan Beith | Berwick-upon-Tweed | LDem | (2010-2015) | 2.5% |
| Lord Bell | (Lords) | Con | (1998-2019) | 0.6% |
| Aaron Bell | Newcastle-under-Lyme | Con | (2019-2024) | 0.6% |
| Lord Bellamy | (Lords) | Con | (2022-present) | 0.0% |
| Lord Bellingham | (Lords) | Con | (2020-present) | 0.4% |
| Henry Bellingham | North West Norfolk | Con | (2001-2005) | 0.5% |
| Henry Bellingham | North West Norfolk | Con | (2005-2010) | 1.3% |
| Henry Bellingham | North West Norfolk | Con | (2010-2015) | 1.4% |
| Henry Bellingham | North West Norfolk | Con | (2015-2017) | 0.0% |
| Henry Bellingham | North West Norfolk | Con | (2017-2019) | 0.2% |
| Mr Martin Bell | Tatton | Independent | (1997-2001) | n/a |
| Stuart Bell | Middlesbrough | Lab | (1997-2001) | 1.5% |
| Stuart Bell | Middlesbrough | Lab | (2001-2005) | 1.6% |
| Stuart Bell | Middlesbrough | Lab | (2005-2010) | 1.9% |
| Stuart Bell | Middlesbrough | Lab | (2010-2012) | 1.0% |
| Torsten Bell | Swansea West | Lab | (2024-present) | 0.0% |
| Lord Bellwin | (Lords) | Con | (1979-2001) | 0.0% |
| Lord Belstead | (Lords) | Con | (1958-2005) | 0.0% |
| Ben Macpherson | Edinburgh Northern and Leith | SNP | (2016-2021) | n/a |
| Ben Macpherson | Edinburgh Northern and Leith | SNP | (2021-present) | n/a |
| Ben Wallace | North East Scotland | Con | (1999-2003) | 1.8% |
| Baroness Benjamin | (Lords) | LDem | (2010-present) | 1.3% |
| Alison Bennett | Mid Sussex | LDem | (2024-present) | 0.0% |
| Mr Andrew Bennett | Denton and Reddish | Lab | (1997-2001) | 2.1% |
| Mr Andrew Bennett | Denton and Reddish | Lab | (2001-2005) | 8.4% |
| Baroness Bennett of Manor Castle | (Lords) | Green | (2019-present) | 0.0% |
| Hilary Benn | Leeds Central | Lab | (1999-2001) | 0.2% |
| Hilary Benn | Leeds Central | Lab | (2001-2005) | 0.7% |
| Hilary Benn | Leeds Central | Lab | (2005-2010) | 0.3% |
| Hilary Benn | Leeds Central | Lab | (2010-2015) | 0.1% |
| Hilary Benn | Leeds Central | Lab | (2015-2017) | 0.9% |
| Hilary Benn | Leeds Central | Lab | (2017-2019) | 0.3% |
| Hilary Benn | Leeds Central | Lab | (2019-2024) | 0.0% |
| Hilary Benn | Leeds South | Lab | (2024-present) | 0.0% |
| Mr Tony Benn | Chesterfield | Lab | (1997-2001) | 5.6% |
| Joe Benton | Bootle | Lab | (1997-2001) | 0.6% |
| Joe Benton | Bootle | Lab | (2001-2005) | 1.9% |
| Joe Benton | Bootle | Lab | (2005-2010) | 3.0% |
| Joe Benton | Bootle | Lab | (2010-2015) | 2.1% |
| Scott Benton | Blackpool South | whilst Con | (2019-2023) | 0.9% |
| Scott Benton | Blackpool South | whilst Independent | (2023-2024) | n/a |
| Lord Benyon | (Lords) | Con | (2021-present) | 0.5% |
| Richard Benyon | Newbury | Con | (2005-2010) | 1.2% |
| Richard Benyon | Newbury | Con | (2010-2015) | 0.9% |
| Richard Benyon | Newbury | Con | (2015-2017) | 0.0% |
| Richard Benyon | Newbury | whilst Con | (2017-2019) | 5.7% |
| Richard Benyon | Newbury | whilst Independent | (2019-2019) | n/a |
| John Bercow | Buckingham | Con | (1997-2001) | 1.0% |
| John Bercow | Buckingham | Con | (2001-2005) | 2.3% |
| John Bercow | Buckingham | whilst Con | (2005-2009) | 7.8% |
| John Bercow | Buckingham | Speaker | (2010-2015) | n/a |
| John Bercow | Buckingham | whilst Speaker | (2009-2010) | n/a |
| John Bercow | Buckingham | Speaker | (2015-2017) | n/a |
| John Bercow | Buckingham | Speaker | (2017-2019) | n/a |
| Paul Beresford | Mole Valley | Con | (1997-2001) | 0.4% |
| Paul Beresford | Mole Valley | Con | (2001-2005) | 0.9% |
| Paul Beresford | Mole Valley | Con | (2005-2010) | 2.5% |
| Paul Beresford | Mole Valley | Con | (2010-2015) | 0.4% |
| Paul Beresford | Mole Valley | Con | (2015-2017) | 0.2% |
| Paul Beresford | Mole Valley | Con | (2017-2019) | 1.5% |
| Paul Beresford | Mole Valley | Con | (2019-2024) | 0.1% |
| Luciana Berger | Liverpool, Wavertree | whilst Independent | (2019-2019) | n/a |
| Luciana Berger | Liverpool, Wavertree | Lab | (2010-2015) | 0.0% |
| Luciana Berger | Liverpool, Wavertree | Lab | (2015-2017) | 1.6% |
| Luciana Berger | Liverpool, Wavertree | whilst Lab | (2017-2019) | 1.1% |
| Lord Berkeley | (Lords) | Lab | (2000-present) | 2.4% |
| Lord Berkeley of Knighton | (Lords) | Crossbench | (2013-present) | 13.8% |
| Mr Gerry Bermingham | St Helens South | Lab | (1997-2001) | 1.2% |
| Lord Bernstein of Craigweil | (Lords) | Lab | (2000-2010) | 1.2% |
| Baroness Berridge | (Lords) | Con | (2011-present) | 1.3% |
| Jake Berry | Rossendale and Darwen | Con | (2010-2015) | 0.6% |
| Jake Berry | Rossendale and Darwen | Con | (2015-2017) | 0.2% |
| Jake Berry | Rossendale and Darwen | Con | (2017-2019) | 0.5% |
| Jake Berry | Rossendale and Darwen | Con | (2019-2024) | 0.9% |
| James Berry | Kingston and Surbiton | Con | (2015-2017) | 0.2% |
| Roger Berry | Kingswood | Lab | (1997-2001) | 1.6% |
| Roger Berry | Kingswood | Lab | (2001-2005) | 3.4% |
| Roger Berry | Kingswood | Lab | (2005-2010) | 1.5% |
| Siân Berry | Brighton Pavilion | Green | (2024-present) | 0.0% |
| Baroness Bertin | (Lords) | Con | (2016-present) | 0.6% |
| Lord Best | (Lords) | Crossbench | (2001-present) | 9.4% |
| Mr Harold Best | Leeds North West | Lab | (1997-2001) | 1.8% |
| Mr Harold Best | Leeds North West | Lab | (2001-2005) | 5.9% |
| Lord Bethell | (Lords) | Con | (2018-present) | 1.3% |
| Clive Betts | Sheffield South East | Lab | (2010-2015) | 0.5% |
| Clive Betts | Sheffield South East | Lab | (2015-2017) | 0.3% |
| Clive Betts | Sheffield South East | Lab | (2017-2019) | 0.0% |
| Clive Betts | Sheffield South East | Lab | (2019-2024) | 0.1% |
| Clive Betts | Sheffield South East | Lab | (2024-present) | 0.0% |
| Clive Betts | Sheffield, Attercliffe | Lab | (1997-2001) | 0.4% |
| Clive Betts | Sheffield, Attercliffe | Lab | (2001-2005) | 1.5% |
| Clive Betts | Sheffield, Attercliffe | Lab | (2005-2010) | 1.4% |
| Lord Bew | (Lords) | Crossbench | (2007-present) | 49.7% |
| Lord Bhatia | (Lords) | Crossbench | (2001-2010) | 54.9% |
| Lord Bhatia | (Lords) | Non-affiliated | (2010-2023) | 29.9% |
| Lord Bhatia | (Lords) | Other | (2001-2001) | n/a |
| Lord Bhattacharyya | (Lords) | Lab | (2004-2019) | 0.3% |
| Saqib Bhatti | Meriden | Con | (2019-2024) | 0.0% |
| Saqib Bhatti | Meriden and Solihull East | Con | (2024-present) | 0.0% |
| Lord Bichard | (Lords) | Crossbench | (2010-present) | 14.0% |
| Lord Biffen | (Lords) | Con | (1997-2007) | 3.5% |
| Lord Bilimoria | (Lords) | Crossbench | (2006-present) | 20.7% |
| Bill Walker | Dunfermline | whilst Independent | (2012-2013) | n/a |
| Bill Walker | Dunfermline | whilst SNP | (2011-2012) | n/a |
| Bill Aitken | Glasgow | Con | (2003-2007) | 0.4% |
| Bill Aitken | Glasgow | Con | (1999-2003) | 0.3% |
| Bill Aitken | Glasgow | Con | (2007-2011) | 0.7% |
| Bill Kidd | Glasgow | SNP | (2007-2011) | 0.0% |
| Bill Butler | Glasgow Anniesland | Lab | (2003-2007) | 1.4% |
| Bill Butler | Glasgow Anniesland | Lab | (2000-2003) | 0.8% |
| Bill Butler | Glasgow Anniesland | Lab | (2007-2011) | 0.2% |
| Bill Kidd | Glasgow Anniesland | SNP | (2011-2016) | n/a |
| Bill Kidd | Glasgow Anniesland | SNP | (2016-2021) | n/a |
| Bill Kidd | Glasgow Anniesland | SNP | (2021-present) | n/a |
| Bill Bowman | North East Scotland | Con | (2016-2021) | n/a |
| Bill Wilson | West of Scotland | SNP | (2007-2011) | 0.3% |
| Baroness Billingham | (Lords) | Lab | (2000-present) | 0.6% |
| Polly Billington | East Thanet | Lab | (2024-present) | 1.9% |
| Lord Bilston | (Lords) | Lab | (2005-2014) | 0.5% |
| Andrew Bingham | High Peak | Con | (2010-2015) | 3.0% |
| Andrew Bingham | High Peak | Con | (2015-2017) | 0.2% |
| Lord Bingham of Cornhill | (Lords) | Crossbench | (1996-2010) | 0.0% |
| Brian Binley | Northampton South | Con | (2005-2010) | 1.9% |
| Brian Binley | Northampton South | Con | (2010-2015) | 5.2% |
| Lord Bird | (Lords) | Crossbench | (2015-present) | 15.4% |
| The Bishop of Birmingham | (Lords) | Bishop | (1994-2002) | 0.0% |
| The Bishop of Birmingham | (Lords) | Bishop | (2010-2022) | 2.5% |
| Lord Birt | (Lords) | Crossbench | (2000-present) | 23.0% |
| Gordon Birtwistle | Burnley | LDem | (2010-2015) | 2.6% |
| Matt Bishop | Forest of Dean | Lab | (2024-present) | 0.8% |
| Lord Black of Brentwood | (Lords) | Con | (2010-present) | 1.4% |
| The Bishop of Blackburn | (Lords) | Bishop | (1999-2003) | 0.0% |
| The Bishop of Blackburn | (Lords) | Bishop | (2009-2012) | 0.0% |
| The Bishop of Blackburn | (Lords) | Bishop | (2019-2022) | 5.9% |
| Lord Black of Crossharbour | (Lords) | Con | (2001-2007) | 0.0% |
| Lord Black of Crossharbour | (Lords) | Non-affiliated | (2007-2024) | n/a |
| Ian Blackford | Ross, Skye and Lochaber | SNP | (2015-2017) | 0.7% |
| Ian Blackford | Ross, Skye and Lochaber | SNP | (2017-2019) | 0.0% |
| Ian Blackford | Ross, Skye and Lochaber | SNP | (2019-2024) | 0.0% |
| Roberta Blackman-Woods | City of Durham | Lab | (2005-2010) | 0.6% |
| Roberta Blackman-Woods | City of Durham | Lab | (2010-2015) | 0.1% |
| Roberta Blackman-Woods | City of Durham | Lab | (2015-2017) | 0.4% |
| Roberta Blackman-Woods | City of Durham | Lab | (2017-2019) | 0.0% |
| Bob Blackman | Harrow East | Con | (2010-2015) | 3.6% |
| Bob Blackman | Harrow East | Con | (2015-2017) | 1.2% |
| Bob Blackman | Harrow East | Con | (2017-2019) | 3.9% |
| Bob Blackman | Harrow East | Con | (2019-2024) | 3.2% |
| Bob Blackman | Harrow East | Con | (2024-present) | 1.9% |
| Kirsty Blackman | Aberdeen North | SNP | (2015-2017) | 0.0% |
| Kirsty Blackman | Aberdeen North | SNP | (2017-2019) | 0.0% |
| Kirsty Blackman | Aberdeen North | SNP | (2019-2024) | 0.0% |
| Kirsty Blackman | Aberdeen North | SNP | (2024-present) | 0.0% |
| Liz Blackman | Erewash | Lab | (1997-2001) | 0.6% |
| Liz Blackman | Erewash | Lab | (2001-2005) | 0.4% |
| Liz Blackman | Erewash | Lab | (2005-2010) | 0.4% |
| Mhairi Black | Paisley and Renfrewshire South | SNP | (2015-2017) | 0.0% |
| Mhairi Black | Paisley and Renfrewshire South | SNP | (2017-2019) | 0.4% |
| Mhairi Black | Paisley and Renfrewshire South | SNP | (2019-2024) | 0.0% |
| Baroness Blackstone | (Lords) | Independent Labour | (2018-present) | n/a |
| Baroness Blackstone | (Lords) | Lab | (1987-2018) | 1.0% |
| Baroness Black of Strome | (Lords) | Crossbench | (2021-present) | 16.7% |
| Lord Blackwell | (Lords) | Con | (1997-present) | 2.7% |
| Nicola Blackwood | Oxford West and Abingdon | Con | (2010-2015) | 0.4% |
| Nicola Blackwood | Oxford West and Abingdon | Con | (2015-2017) | 0.0% |
| Baroness Blackwood of North Oxford | (Lords) | Con | (2019-present) | 0.2% |
| Lord Blair of Boughton | (Lords) | Crossbench | (2010-present) | 20.2% |
| Tony Blair | Sedgefield | Lab | (1997-2001) | 0.0% |
| Tony Blair | Sedgefield | Lab | (2001-2005) | 2.1% |
| Tony Blair | Sedgefield | Lab | (2005-2007) | 2.1% |
| Lord Blake | (Lords) | Con | (1971-2003) | 0.0% |
| Baroness Blake of Leeds | (Lords) | Lab | (2021-present) | 0.2% |
| Olivia Blake | Sheffield Hallam | Lab | (2024-present) | 1.2% |
| Olivia Blake | Sheffield, Hallam | Lab | (2019-2024) | 0.0% |
| Lord Blaker | (Lords) | Con | (1994-2009) | 1.0% |
| Rachel Blake | Cities of London and Westminster | Lab | (2024-present) | 0.0% |
| Baroness Blatch | (Lords) | Con | (1987-2005) | 0.5% |
| Hazel Blears | Salford | Lab | (1997-2001) | 0.1% |
| Hazel Blears | Salford | Lab | (2001-2005) | 0.5% |
| Hazel Blears | Salford | Lab | (2005-2010) | 0.3% |
| Hazel Blears | Salford and Eccles | Lab | (2010-2015) | 0.8% |
| Lord Blease | (Lords) | Lab | (1978-2008) | 3.9% |
| Viscount Bledisloe | (Lords) | Crossbench | (1979-2009) | 14.9% |
| Lord Blencathra | (Lords) | Con | (2011-present) | 3.0% |
| Tom Blenkinsop | Middlesbrough South and East Cleveland | Lab | (2010-2015) | 0.6% |
| Tom Blenkinsop | Middlesbrough South and East Cleveland | Lab | (2015-2017) | 0.9% |
| Bob Blizzard | Waveney | Lab | (1997-2001) | 0.2% |
| Bob Blizzard | Waveney | Lab | (2001-2005) | 1.1% |
| Bob Blizzard | Waveney | Lab | (2005-2010) | 0.0% |
| Paul Blomfield | Sheffield Central | Lab | (2010-2015) | 0.2% |
| Paul Blomfield | Sheffield Central | Lab | (2015-2017) | 0.6% |
| Paul Blomfield | Sheffield Central | Lab | (2017-2019) | 0.5% |
| Paul Blomfield | Sheffield Central | Lab | (2019-2024) | 0.0% |
| Baroness Blood | (Lords) | Lab | (1999-2018) | 3.3% |
| Baroness Bloomfield of Hinton Waldrist | (Lords) | Con | (2016-present) | 0.0% |
| Christopher Bloore | Redditch | Lab | (2024-present) | 0.0% |
| Baroness Blower | (Lords) | Lab | (2019-present) | 0.6% |
| Elsie Blundell | Heywood and Middleton North | Lab | (2024-present) | 0.5% |
| Lord Blunkett | (Lords) | Lab | (2015-present) | 0.5% |
| David Blunkett | Sheffield, Brightside | Lab | (1997-2001) | 0.8% |
| David Blunkett | Sheffield, Brightside | Lab | (2001-2005) | 1.8% |
| David Blunkett | Sheffield, Brightside | Lab | (2005-2010) | 0.9% |
| David Blunkett | Sheffield, Brightside and Hillsborough | Lab | (2010-2015) | 0.5% |
| Crispin Blunt | Reigate | Con | (1997-2001) | 1.2% |
| Crispin Blunt | Reigate | Con | (2001-2005) | 2.4% |
| Crispin Blunt | Reigate | Con | (2005-2010) | 2.9% |
| Crispin Blunt | Reigate | Con | (2010-2015) | 1.6% |
| Crispin Blunt | Reigate | Con | (2015-2017) | 2.0% |
| Crispin Blunt | Reigate | Con | (2017-2019) | 3.8% |
| Crispin Blunt | Reigate | Con | (2019-2024) | 2.6% |
| Lord Blyth of Rowington | (Lords) | Con | (1995-2018) | 0.0% |
| Lord Boardman | (Lords) | Con | (1980-2003) | 0.4% |
| Lord Boateng | (Lords) | Lab | (2010-present) | 0.6% |
| Mr Paul Boateng | Brent South | Lab | (1997-2001) | 0.1% |
| Mr Paul Boateng | Brent South | Lab | (2001-2005) | 0.5% |
| Bob Doris | Glasgow | SNP | (2011-2016) | n/a |
| Bob Doris | Glasgow | SNP | (2007-2011) | 0.0% |
| Bob Doris | Glasgow Maryhill and Springburn | SNP | (2016-2021) | n/a |
| Bob Doris | Glasgow Maryhill and Springburn | SNP | (2021-present) | n/a |
| Mr Richard Body | Boston and Skegness | Con | (1997-2001) | 0.7% |
| Nicholas Boles | Grantham and Stamford | Con | (2010-2015) | 1.2% |
| Nicholas Boles | Grantham and Stamford | Con | (2015-2017) | 0.0% |
| Nicholas Boles | Grantham and Stamford | whilst Con | (2017-2019) | 7.7% |
| Nicholas Boles | Grantham and Stamford | whilst Independent | (2019-2019) | n/a |
| Kevin Bonavia | Stevenage | Lab | (2024-present) | 0.0% |
| Peter Bone | Wellingborough | Con | (2005-2010) | 3.7% |
| Peter Bone | Wellingborough | Con | (2010-2015) | 15.3% |
| Peter Bone | Wellingborough | Con | (2015-2017) | 3.3% |
| Peter Bone | Wellingborough | Con | (2017-2019) | 6.1% |
| Peter Bone | Wellingborough | whilst Con | (2019-2023) | 6.1% |
| Peter Bone | Wellingborough | whilst Independent | (2023-2023) | n/a |
| Baroness Bonham-Carter of Yarnbury | (Lords) | LDem | (2004-present) | 0.1% |
| Steven Bonnar | Coatbridge, Chryston and Bellshill | SNP | (2019-2024) | 0.0% |
| Sarah Bool | South Northamptonshire | Con | (2024-present) | 0.0% |
| Lord Booth | (Lords) | Con | (2024-present) | 0.0% |
| Lord Booth-Smith | (Lords) | Con | (2024-present) | 0.0% |
| Baroness Boothroyd | (Lords) | Crossbench | (2001-2023) | 29.2% |
| Miss Betty Boothroyd | West Bromwich West | Speaker | (1997-2000) | n/a |
| Lord Borrie | (Lords) | Lab | (1995-2016) | 1.5% |
| David Borrow | South Ribble | Lab | (1997-2001) | 0.3% |
| David Borrow | South Ribble | Lab | (2001-2005) | 1.4% |
| David Borrow | South Ribble | Lab | (2005-2010) | 1.8% |
| Lord Borwick | (Lords) | Con | (2013-present) | 0.5% |
| Victoria Borwick | Kensington | Con | (2015-2017) | 0.0% |
| Lord Boston of Faversham | (Lords) | Crossbench | (1976-2011) | 48.8% |
| Lord Boswell of Aynho | (Lords) | Con | (2010-2012) | 0.5% |
| Lord Boswell of Aynho | (Lords) | Non-affiliated | (2012-present) | 11.1% |
| Phil Boswell | Coatbridge, Chryston and Bellshill | SNP | (2015-2017) | 0.3% |
| Tim Boswell | Daventry | Con | (2005-2010) | 1.3% |
| Tim Boswell | Daventry | Con | (1997-2001) | 1.2% |
| Tim Boswell | Daventry | Con | (2001-2005) | 0.7% |
| Lord Botham | (Lords) | Crossbench | (2020-present) | 66.7% |
| Jade Botterill | Ossett and Denby Dale | Lab | (2024-present) | 0.0% |
| Baroness Bottomley of Nettlestone | (Lords) | Con | (2005-present) | 0.5% |
| Peter Bottomley | Worthing West | Con | (1997-2001) | 3.1% |
| Peter Bottomley | Worthing West | Con | (2001-2005) | 3.4% |
| Peter Bottomley | Worthing West | Con | (2005-2010) | 3.8% |
| Peter Bottomley | Worthing West | Con | (2010-2015) | 5.0% |
| Peter Bottomley | Worthing West | Con | (2015-2017) | 3.4% |
| Peter Bottomley | Worthing West | Con | (2017-2019) | 1.5% |
| Peter Bottomley | Worthing West | Con | (2019-2024) | 4.2% |
| Mrs Virginia Bottomley | South West Surrey | Con | (1997-2001) | 0.4% |
| Mrs Virginia Bottomley | South West Surrey | Con | (2001-2005) | 0.2% |
| Lord Bourne of Aberystwyth | (Lords) | Con | (2013-present) | 1.8% |
| Andrew Bowie | West Aberdeenshire and Kincardine | Con | (2017-2019) | 1.4% |
| Andrew Bowie | West Aberdeenshire and Kincardine | Con | (2019-2024) | 0.2% |
| Andrew Bowie | West Aberdeenshire and Kincardine | Con | (2024-present) | 0.0% |
| Baroness Bowles of Berkhamsted | (Lords) | LDem | (2015-present) | 0.0% |
| Lord Bowness | (Lords) | Con | (1996-2020) | 10.4% |
| Lord Bowness | (Lords) | Non-affiliated | (2020-present) | 13.3% |
| Lord Boyce | (Lords) | Crossbench | (2003-2022) | 21.1% |
| Baroness Boycott | (Lords) | Crossbench | (2018-present) | 8.9% |
| Lord Boyd of Duncansby | (Lords) | Crossbench | (2006-2006) | 50.0% |
| Lord Boyd of Duncansby | (Lords) | Lab | (2006-2012) | 0.8% |
| Lord Boyd of Duncansby | (Lords) | Non-affiliated | (2012-present) | n/a |
| Lord Brabazon of Tara | (Lords) | Con | (2012-2022) | 0.9% |
| Lord Brabazon of Tara | (Lords) | Crossbench | (1974-2012) | 16.2% |
| Tracy Brabin | Batley and Spen | Lab | (2016-2017) | 0.0% |
| Tracy Brabin | Batley and Spen | Lab | (2017-2019) | 0.0% |
| Tracy Brabin | Batley and Spen | Lab | (2019-2021) | 0.0% |
| Sureena Brackenridge | Wolverhampton North East | Lab | (2024-present) | 2.2% |
| The Bishop of Bradford | (Lords) | Bishop | (1997-2002) | 20.0% |
| The Bishop of Bradford | (Lords) | Bishop | (2009-2010) | 0.0% |
| Lord Bradley | (Lords) | Lab | (2006-present) | 0.1% |
| Ben Bradley | Mansfield | Con | (2017-2019) | 2.1% |
| Ben Bradley | Mansfield | Con | (2019-2024) | 1.0% |
| Karen Bradley | Staffordshire Moorlands | Con | (2010-2015) | 0.9% |
| Karen Bradley | Staffordshire Moorlands | Con | (2015-2017) | 0.0% |
| Karen Bradley | Staffordshire Moorlands | Con | (2017-2019) | 0.5% |
| Karen Bradley | Staffordshire Moorlands | Con | (2019-2024) | 0.6% |
| Karen Bradley | Staffordshire Moorlands | Con | (2024-present) | 0.0% |
| Mr Keith Bradley | Manchester, Withington | Lab | (1997-2001) | 0.2% |
| Mr Keith Bradley | Manchester, Withington | Lab | (2001-2005) | 1.0% |
| Mr Peter Bradley | The Wrekin | Lab | (1997-2001) | 0.9% |
| Mr Peter Bradley | The Wrekin | Lab | (2001-2005) | 0.7% |
| Lord Bradshaw | (Lords) | LDem | (1999-present) | 1.6% |
| Ben Bradshaw | Exeter | Lab | (1997-2001) | 0.3% |
| Ben Bradshaw | Exeter | Lab | (2001-2005) | 0.3% |
| Ben Bradshaw | Exeter | Lab | (2005-2010) | 0.9% |
| Ben Bradshaw | Exeter | Lab | (2010-2015) | 0.5% |
| Ben Bradshaw | Exeter | Lab | (2015-2017) | 2.5% |
| Ben Bradshaw | Exeter | Lab | (2017-2019) | 0.5% |
| Ben Bradshaw | Exeter | Lab | (2019-2024) | 0.2% |
| Baroness Brady | (Lords) | Con | (2014-present) | 0.3% |
| Lord Brady of Altrincham | (Lords) | Con | (2024-present) | 0.0% |
| Graham Brady | Altrincham and Sale West | Con | (1997-2001) | 1.2% |
| Graham Brady | Altrincham and Sale West | Con | (2001-2005) | 0.2% |
| Graham Brady | Altrincham and Sale West | Con | (2005-2010) | 1.6% |
| Graham Brady | Altrincham and Sale West | Con | (2010-2015) | 3.2% |
| Graham Brady | Altrincham and Sale West | Con | (2015-2017) | 1.6% |
| Graham Brady | Altrincham and Sale West | Con | (2017-2019) | 2.0% |
| Graham Brady | Altrincham and Sale West | Con | (2019-2024) | 2.9% |
| Mickey Brady | Newry and Armagh | SF | (2015-2017) | n/a |
| Mickey Brady | Newry and Armagh | SF | (2017-2019) | n/a |
| Mickey Brady | Newry and Armagh | SF | (2019-2024) | n/a |
| Lord Bragg | (Lords) | Lab | (1998-present) | 3.0% |
| Lord Braine of Wheatley | (Lords) | Con | (1992-2000) | n/a |
| Tom Brake | Carshalton and Wallington | LDem | (1997-2001) | 0.8% |
| Tom Brake | Carshalton and Wallington | LDem | (2001-2005) | 1.2% |
| Tom Brake | Carshalton and Wallington | LDem | (2005-2010) | 0.5% |
| Tom Brake | Carshalton and Wallington | LDem | (2010-2015) | 0.6% |
| Tom Brake | Carshalton and Wallington | LDem | (2015-2017) | 0.4% |
| Tom Brake | Carshalton and Wallington | LDem | (2017-2019) | 0.3% |
| Lord Bramall | (Lords) | Crossbench | (1987-2013) | 18.1% |
| Dr Peter Brand | Isle of Wight | LDem | (1997-2001) | 1.9% |
| Aphra Brandreth | Chester South and Eddisbury | Con | (2024-present) | 2.1% |
| Jonathan Brash | Hartlepool | Lab | (2024-present) | 0.0% |
| Suella Braverman | Fareham | Con | (2017-2019) | 3.1% |
| Suella Braverman | Fareham | Con | (2019-2024) | 0.9% |
| Suella Braverman | Fareham and Waterlooville | Con | (2024-present) | 0.0% |
| Angie Bray | Ealing Central and Acton | Con | (2010-2015) | 0.9% |
| Baroness Bray of Coln | (Lords) | Con | (2022-present) | 0.0% |
| Julian Brazier | Canterbury | Con | (1997-2001) | 0.1% |
| Julian Brazier | Canterbury | Con | (2001-2005) | 0.9% |
| Julian Brazier | Canterbury | Con | (2005-2010) | 1.1% |
| Julian Brazier | Canterbury | Con | (2010-2015) | 1.1% |
| Julian Brazier | Canterbury | Con | (2015-2017) | 0.0% |
| Colin Breed | South East Cornwall | LDem | (1997-2001) | 1.7% |
| Colin Breed | South East Cornwall | LDem | (2001-2005) | 2.5% |
| Colin Breed | South East Cornwall | LDem | (2005-2010) | 2.7% |
| Lord Brennan | (Lords) | Lab | (2000-2020) | 4.9% |
| Lord Brennan | (Lords) | Non-affiliated | (2020-present) | 8.4% |
| Kevin Brennan | Cardiff West | Lab | (2001-2005) | 1.5% |
| Kevin Brennan | Cardiff West | Lab | (2005-2010) | 0.6% |
| Kevin Brennan | Cardiff West | Lab | (2010-2015) | 0.5% |
| Kevin Brennan | Cardiff West | Lab | (2015-2017) | 1.2% |
| Kevin Brennan | Cardiff West | Lab | (2017-2019) | 0.0% |
| Kevin Brennan | Cardiff West | Lab | (2019-2024) | 0.0% |
| Jack Brereton | Stoke-on-Trent South | Con | (2017-2019) | 0.2% |
| Jack Brereton | Stoke-on-Trent South | Con | (2019-2024) | 0.4% |
| Lord Brett | (Lords) | Lab | (1999-2012) | 1.0% |
| Alex Brewer | North East Hampshire | LDem | (2024-present) | 0.0% |
| Brian Adam | Aberdeen Donside | SNP | (2011-2013) | n/a |
| Brian Adam | Aberdeen North | SNP | (2003-2007) | 3.2% |
| Brian Adam | Aberdeen North | SNP | (2007-2011) | 0.3% |
| Brian Monteith | Mid Scotland and Fife | whilst Con | (2003-2005) | 0.8% |
| Brian Monteith | Mid Scotland and Fife | Con | (1999-2003) | 0.8% |
| Brian Monteith | Mid Scotland and Fife | whilst Independent | (2005-2007) | n/a |
| Brian Adam | North East Scotland | SNP | (1999-2003) | 1.8% |
| Brian Whittle | South Scotland | Con | (2016-2021) | n/a |
| Brian Whittle | South Scotland | Con | (2021-present) | n/a |
| Brian Fitzpatrick | Strathkelvin and Bearsden | Lab | (2001-2003) | 0.6% |
| Phil Brickell | Bolton West | Lab | (2024-present) | 0.0% |
| Lord Bridge of Harwich | (Lords) | Crossbench | (1980-2007) | 0.0% |
| Viscount Bridgeman | (Lords) | Con | (1982-present) | 0.5% |
| Andrew Bridgen | North West Leicestershire | Con | (2010-2015) | 4.5% |
| Andrew Bridgen | North West Leicestershire | Con | (2015-2017) | 1.0% |
| Andrew Bridgen | North West Leicestershire | Con | (2017-2019) | 3.5% |
| Andrew Bridgen | North West Leicestershire | whilst Con | (2019-2023) | 2.4% |
| Andrew Bridgen | North West Leicestershire | whilst Independent | (2023-2023) | n/a |
| Andrew Bridgen | North West Leicestershire | whilst Reclaim | (2023-2024) | 0.0% |
| Lord Bridges | (Lords) | Crossbench | (1969-2016) | 16.4% |
| Lord Bridges of Headley | (Lords) | Con | (2015-present) | 1.1% |
| Lord Briggs | (Lords) | Crossbench | (1976-2016) | 42.9% |
| Lord Brightman | (Lords) | Crossbench | (1982-2006) | 19.8% |
| Baroness Brigstocke | (Lords) | Con | (1990-2004) | 1.3% |
| Steve Brine | Winchester | Con | (2010-2015) | 1.1% |
| Steve Brine | Winchester | Con | (2015-2017) | 0.0% |
| Steve Brine | Winchester | whilst Con | (2017-2019) | 5.3% |
| Steve Brine | Winchester | Con | (2019-2024) | 1.8% |
| Steve Brine | Winchester | whilst Independent | (2019-2019) | n/a |
| Baroness Brinton | (Lords) | LDem | (2011-present) | 1.0% |
| The Bishop of Bristol | (Lords) | Bishop | (1990-2002) | 0.0% |
| The Bishop of Bristol | (Lords) | Bishop | (2009-2017) | 0.0% |
| The Bishop of Bristol | (Lords) | Bishop | (2018-present) | 0.0% |
| Bristow Muldoon | Livingston | Lab | (2003-2007) | 0.7% |
| Bristow Muldoon | Livingston | Lab | (1999-2003) | 0.2% |
| Paul Bristow | Peterborough | Con | (2019-2024) | 0.8% |
| Sara Britcliffe | Hyndburn | Con | (2019-2024) | 0.2% |
| Lord Brittan of Spennithorne | (Lords) | Con | (2000-2015) | 2.6% |
| Deidre Brock | Edinburgh North and Leith | SNP | (2015-2017) | 0.0% |
| Deidre Brock | Edinburgh North and Leith | SNP | (2017-2019) | 0.0% |
| Deidre Brock | Edinburgh North and Leith | SNP | (2019-2024) | 0.0% |
| Lord Broers | (Lords) | Crossbench | (2004-2021) | 25.0% |
| James Brokenshire | Hornchurch | Con | (2005-2010) | 1.1% |
| James Brokenshire | Old Bexley and Sidcup | Con | (2010-2015) | 0.5% |
| James Brokenshire | Old Bexley and Sidcup | Con | (2015-2017) | 0.0% |
| James Brokenshire | Old Bexley and Sidcup | Con | (2017-2019) | 0.6% |
| James Brokenshire | Old Bexley and Sidcup | Con | (2019-2021) | 0.0% |
| Lord Brooke of Alverthorpe | (Lords) | Lab | (1997-present) | 1.3% |
| Annette Brooke | Mid Dorset and North Poole | LDem | (2001-2005) | 1.2% |
| Annette Brooke | Mid Dorset and North Poole | LDem | (2005-2010) | 1.3% |
| Annette Brooke | Mid Dorset and North Poole | LDem | (2010-2015) | 2.1% |
| Viscount Brookeborough | (Lords) | Crossbench | (1987-present) | 35.1% |
| Mr Peter Brooke | Cities of London and Westminster | Con | (1997-2001) | 0.7% |
| Lord Brookes | (Lords) | Crossbench | (1976-2002) | n/a |
| Lord Brooke of Sutton Mandeville | (Lords) | Con | (2001-2015) | 1.4% |
| Baroness Brooke of Ystradfellte | (Lords) | Other | (1964-2000) | n/a |
| Lord Brookman | (Lords) | Lab | (1998-2020) | 1.5% |
| Lord Brooks of Tremorfa | (Lords) | Lab | (1979-2016) | 3.8% |
| Lord Brougham and Vaux | (Lords) | Con | (1967-2023) | 0.7% |
| Jessica Brown-Fuller | Chichester | LDem | (2024-present) | 0.0% |
| Alan Brown | Kilmarnock and Loudoun | SNP | (2015-2017) | 0.0% |
| Alan Brown | Kilmarnock and Loudoun | SNP | (2017-2019) | 0.0% |
| Alan Brown | Kilmarnock and Loudoun | SNP | (2019-2024) | 0.1% |
| Baroness Brown of Cambridge | (Lords) | Crossbench | (2015-present) | 9.3% |
| Lord Browne-Wilkinson | (Lords) | Crossbench | (1991-2016) | n/a |
| Anthony Browne | South Cambridgeshire | Con | (2019-2024) | 0.1% |
| Lord Brown of Eaton-under-Heywood | (Lords) | Judge | (2004-2023) | 10.2% |
| Lord Browne of Belmont | (Lords) | DUP | (2006-present) | 0.4% |
| Des Browne | Kilmarnock and Loudoun | Lab | (1997-2001) | 0.1% |
| Des Browne | Kilmarnock and Loudoun | Lab | (2001-2005) | 0.0% |
| Des Browne | Kilmarnock and Loudoun | Lab | (2005-2010) | 1.9% |
| Jeremy Browne | Taunton | LDem | (2005-2010) | 1.1% |
| Jeremy Browne | Taunton Deane | LDem | (2010-2015) | 1.0% |
| Lord Browne of Ladyton | (Lords) | Lab | (2010-present) | 0.2% |
| Lord Browne of Madingley | (Lords) | Crossbench | (2001-present) | 18.2% |
| Gordon Brown | Dunfermline East | Lab | (1997-2001) | 0.0% |
| Gordon Brown | Dunfermline East | Lab | (2001-2005) | 0.0% |
| Gordon Brown | Kirkcaldy and Cowdenbeath | Lab | (2005-2010) | 0.6% |
| Gordon Brown | Kirkcaldy and Cowdenbeath | Lab | (2010-2015) | 0.0% |
| Baroness Browning | (Lords) | Con | (2010-present) | 1.5% |
| Angela Browning | Tiverton and Honiton | Con | (2005-2010) | 0.5% |
| Angela Browning | Tiverton and Honiton | Con | (2001-2005) | 1.5% |
| Angela Browning | Tiverton and Honiton | Con | (1997-2001) | 0.4% |
| Lord Brownlow of Shurlock Row | (Lords) | Con | (2019-present) | 0.6% |
| Lyn Brown | West Ham | Lab | (2005-2010) | 0.9% |
| Lyn Brown | West Ham | Lab | (2010-2015) | 0.7% |
| Lyn Brown | West Ham | Lab | (2015-2017) | 0.9% |
| Lyn Brown | West Ham | Lab | (2017-2019) | 0.3% |
| Lyn Brown | West Ham | Lab | (2019-2024) | 0.0% |
| Nick Brown | Newcastle upon Tyne East | whilst Independent | (2022-2024) | n/a |
| Nick Brown | Newcastle upon Tyne East | Lab | (2010-2015) | 0.5% |
| Nick Brown | Newcastle upon Tyne East | Lab | (2015-2017) | 1.0% |
| Nick Brown | Newcastle upon Tyne East | Lab | (2017-2019) | 0.3% |
| Nick Brown | Newcastle upon Tyne East | whilst Lab | (2019-2022) | 0.0% |
| Nick Brown | Newcastle upon Tyne East and Wallsend | Lab | (1997-2001) | 0.3% |
| Nick Brown | Newcastle upon Tyne East and Wallsend | Lab | (2001-2005) | 0.5% |
| Nick Brown | Newcastle upon Tyne East and Wallsend | Lab | (2005-2010) | 0.4% |
| Russell Brown | Dumfries | Lab | (1997-2001) | 0.4% |
| Russell Brown | Dumfries | Lab | (2001-2005) | 0.4% |
| Russell Brown | Dumfries and Galloway | Lab | (2005-2010) | 0.2% |
| Russell Brown | Dumfries and Galloway | Lab | (2010-2015) | 0.0% |
| Bruce Crawford | Mid Scotland and Fife | SNP | (2003-2007) | 0.7% |
| Bruce Crawford | Mid Scotland and Fife | SNP | (1999-2003) | 2.0% |
| Bruce Crawford | Stirling | SNP | (2011-2016) | n/a |
| Bruce Crawford | Stirling | SNP | (2007-2011) | 0.2% |
| Bruce Crawford | Stirling | SNP | (2016-2021) | n/a |
| Mr Bruce McFee | West of Scotland | SNP | (2003-2007) | 1.9% |
| Lord Bruce-Lockhart | (Lords) | Con | (2006-2008) | 0.0% |
| Lord Bruce of Bennachie | (Lords) | LDem | (2015-present) | 0.1% |
| Lord Bruce of Donington | (Lords) | Lab | (1975-2005) | 18.1% |
| Fiona Bruce | Congleton | Con | (2010-2015) | 1.9% |
| Fiona Bruce | Congleton | Con | (2015-2017) | 0.5% |
| Fiona Bruce | Congleton | Con | (2017-2019) | 2.5% |
| Fiona Bruce | Congleton | Con | (2019-2024) | 1.0% |
| Mr Ian Bruce | South Dorset | Con | (1997-2001) | 0.6% |
| Malcolm Bruce | Gordon | LDem | (2010-2015) | 1.2% |
| Malcolm Bruce | Gordon | LDem | (1997-2001) | 2.3% |
| Malcolm Bruce | Gordon | LDem | (2001-2005) | 3.0% |
| Malcolm Bruce | Gordon | LDem | (2005-2010) | 0.4% |
| Baroness Bryan of Partick | (Lords) | Lab | (2018-present) | 0.9% |
| Chris Bryant | Rhondda | Lab | (2001-2005) | 0.9% |
| Chris Bryant | Rhondda | Lab | (2005-2010) | 0.7% |
| Chris Bryant | Rhondda | Lab | (2010-2015) | 0.3% |
| Chris Bryant | Rhondda | Lab | (2015-2017) | 1.3% |
| Chris Bryant | Rhondda | Lab | (2017-2019) | 0.3% |
| Chris Bryant | Rhondda | Lab | (2019-2024) | 0.1% |
| Chris Bryant | Rhondda and Ogmore | Lab | (2024-present) | 0.0% |
| Felicity Buchan | Kensington | Con | (2019-2024) | 0.1% |
| Karen Buck | Regent's Park and Kensington North | Lab | (1997-2001) | 0.1% |
| Karen Buck | Regent's Park and Kensington North | Lab | (2001-2005) | 1.7% |
| Karen Buck | Regent's Park and Kensington North | Lab | (2005-2010) | 1.0% |
| Karen Buck | Westminster North | Lab | (2010-2015) | 0.0% |
| Karen Buck | Westminster North | Lab | (2015-2017) | 1.2% |
| Karen Buck | Westminster North | Lab | (2017-2019) | 0.3% |
| Karen Buck | Westminster North | Lab | (2019-2024) | 0.1% |
| Robert Buckland | South Swindon | Con | (2010-2015) | 1.7% |
| Robert Buckland | South Swindon | Con | (2015-2017) | 0.0% |
| Robert Buckland | South Swindon | Con | (2017-2019) | 1.2% |
| Robert Buckland | South Swindon | Con | (2019-2024) | 3.6% |
| Julia Buckley | Shrewsbury | Lab | (2024-present) | 0.0% |
| Baroness Bull | (Lords) | Crossbench | (2018-present) | 5.0% |
| Lord Bullock | (Lords) | Crossbench | (1976-2004) | n/a |
| Richard Burden | Birmingham, Northfield | Lab | (1997-2001) | 0.3% |
| Richard Burden | Birmingham, Northfield | Lab | (2001-2005) | 1.4% |
| Richard Burden | Birmingham, Northfield | Lab | (2005-2010) | 1.7% |
| Richard Burden | Birmingham, Northfield | Lab | (2010-2015) | 0.4% |
| Richard Burden | Birmingham, Northfield | Lab | (2015-2017) | 1.1% |
| Richard Burden | Birmingham, Northfield | Lab | (2017-2019) | 0.0% |
| Alex Burghart | Brentwood and Ongar | Con | (2017-2019) | 0.0% |
| Alex Burghart | Brentwood and Ongar | Con | (2019-2024) | 0.3% |
| Alex Burghart | Brentwood and Ongar | Con | (2024-present) | 0.0% |
| Colin Burgon | Elmet | Lab | (1997-2001) | 0.1% |
| Colin Burgon | Elmet | Lab | (2001-2005) | 2.8% |
| Colin Burgon | Elmet | Lab | (2005-2010) | 4.9% |
| Richard Burgon | Leeds East | whilst Independent | (2024-present) | n/a |
| Richard Burgon | Leeds East | Lab | (2015-2017) | 0.6% |
| Richard Burgon | Leeds East | Lab | (2017-2019) | 0.3% |
| Richard Burgon | Leeds East | Lab | (2019-2024) | 0.4% |
| Richard Burgon | Leeds East | whilst Lab | (2024-2024) | 25.0% |
| Maureen Burke | Glasgow North East | Lab | (2024-present) | 0.7% |
| Aidan Burley | Cannock Chase | Con | (2010-2015) | 1.8% |
| Lord Burlison | (Lords) | Lab | (1997-2008) | 0.1% |
| Lord Burnett | (Lords) | LDem | (2006-present) | 2.8% |
| Mr John Burnett | Torridge and West Devon | LDem | (1997-2001) | 4.1% |
| Mr John Burnett | Torridge and West Devon | LDem | (2001-2005) | 4.3% |
| Lord Burnett of Maldon | (Lords) | Non-affiliated | (2017-present) | 33.3% |
| Lord Burnham | (Lords) | Con | (1993-2005) | 1.0% |
| Andy Burnham | Leigh | Lab | (2001-2005) | 0.6% |
| Andy Burnham | Leigh | Lab | (2005-2010) | 1.0% |
| Andy Burnham | Leigh | Lab | (2010-2015) | 0.6% |
| Andy Burnham | Leigh | Lab | (2015-2017) | 0.0% |
| Lord Burns | (Lords) | Crossbench | (1998-present) | 33.3% |
| Conor Burns | Bournemouth West | Con | (2010-2015) | 2.2% |
| Conor Burns | Bournemouth West | Con | (2015-2017) | 0.0% |
| Conor Burns | Bournemouth West | Con | (2017-2019) | 2.4% |
| Conor Burns | Bournemouth West | Con | (2019-2024) | 0.0% |
| David Burnside | South Antrim | whilst Independent Ulster Unionist | (2003-2004) | n/a |
| David Burnside | South Antrim | whilst UUP | (2001-2003) | 2.7% |
| David Burnside | South Antrim | whilst UUP | (2004-2005) | 1.3% |
| Simon Burns | Chelmsford | Con | (2010-2015) | 0.6% |
| Simon Burns | Chelmsford | Con | (2015-2017) | 0.0% |
| Simon Burns | West Chelmsford | Con | (1997-2001) | 0.4% |
| Simon Burns | West Chelmsford | Con | (2001-2005) | 0.3% |
| Simon Burns | West Chelmsford | Con | (2005-2010) | 0.4% |
| David Burrowes | Enfield, Southgate | Con | (2005-2010) | 0.8% |
| David Burrowes | Enfield, Southgate | Con | (2010-2015) | 1.4% |
| David Burrowes | Enfield, Southgate | Con | (2015-2017) | 0.5% |
| Paul Burstow | Sutton and Cheam | LDem | (1997-2001) | 1.0% |
| Paul Burstow | Sutton and Cheam | LDem | (2001-2005) | 1.3% |
| Paul Burstow | Sutton and Cheam | LDem | (2005-2010) | 1.2% |
| Paul Burstow | Sutton and Cheam | LDem | (2010-2015) | 1.0% |
| Alistair Burt | North East Bedfordshire | Con | (2001-2005) | 1.1% |
| Alistair Burt | North East Bedfordshire | Con | (2005-2010) | 0.9% |
| Alistair Burt | North East Bedfordshire | Con | (2010-2015) | 1.1% |
| Alistair Burt | North East Bedfordshire | Con | (2015-2017) | 0.0% |
| Alistair Burt | North East Bedfordshire | whilst Con | (2017-2019) | 5.3% |
| Alistair Burt | North East Bedfordshire | whilst Independent | (2019-2019) | n/a |
| Lorely Burt | Solihull | LDem | (2005-2010) | 1.4% |
| Lorely Burt | Solihull | LDem | (2010-2015) | 0.3% |
| David Burton-Sampson | Southend West and Leigh | Lab | (2024-present) | 0.6% |
| Baroness Burt of Solihull | (Lords) | LDem | (2015-present) | 0.0% |
| Baroness Buscombe | (Lords) | Con | (1998-present) | 1.2% |
| Baroness Butler-Sloss | (Lords) | Crossbench | (2006-present) | 17.9% |
| Lord Butler of Brockwell | (Lords) | Crossbench | (1998-present) | 28.0% |
| Mrs Christine Butler | Castle Point | Lab | (1997-2001) | 0.8% |
| Dawn Butler | Brent Central | Lab | (2015-2017) | 1.3% |
| Dawn Butler | Brent Central | Lab | (2017-2019) | 0.6% |
| Dawn Butler | Brent Central | Lab | (2019-2024) | 0.5% |
| Dawn Butler | Brent East | Lab | (2024-present) | 2.8% |
| Dawn Butler | Brent South | Lab | (2005-2010) | 0.8% |
| Rob Butler | Aylesbury | Con | (2019-2024) | 0.2% |
| Lord Butterfield | (Lords) | Con | (1988-2000) | 0.0% |
| John Butterfill | Bournemouth West | Con | (1997-2001) | 0.3% |
| John Butterfill | Bournemouth West | Con | (2001-2005) | 0.8% |
| John Butterfill | Bournemouth West | Con | (2005-2010) | 1.6% |
| Lord Butterworth | (Lords) | Con | (1985-2003) | 0.0% |
| Lord Buxton of Alsa | (Lords) | Con | (1978-2009) | 5.3% |
| Stephen Byers | North Tyneside | Lab | (1997-2001) | 0.3% |
| Stephen Byers | North Tyneside | Lab | (2001-2005) | 0.1% |
| Stephen Byers | North Tyneside | Lab | (2005-2010) | 1.4% |
| Baroness Byford | (Lords) | Con | (1996-2020) | 0.7% |
| Dan Byles | North Warwickshire | Con | (2010-2015) | 1.8% |
| Ian Byrne | Liverpool West Derby | whilst Independent | (2024-present) | n/a |
| Ian Byrne | Liverpool West Derby | whilst Lab | (2024-2024) | 25.0% |
| Ian Byrne | Liverpool, West Derby | Lab | (2019-2024) | 0.1% |
| Liam Byrne | Birmingham Hodge Hill and Solihull North | Lab | (2024-present) | 2.2% |
| Liam Byrne | Birmingham, Hodge Hill | Lab | (2004-2005) | 0.9% |
| Liam Byrne | Birmingham, Hodge Hill | Lab | (2005-2010) | 0.7% |
| Liam Byrne | Birmingham, Hodge Hill | Lab | (2010-2015) | 0.0% |
| Liam Byrne | Birmingham, Hodge Hill | Lab | (2015-2017) | 0.4% |
| Liam Byrne | Birmingham, Hodge Hill | Lab | (2017-2019) | 0.3% |
| Liam Byrne | Birmingham, Hodge Hill | Lab | (2019-2024) | 0.0% |
| Vincent Cable | Twickenham | LDem | (1997-2001) | 1.6% |
| Vincent Cable | Twickenham | LDem | (2001-2005) | 1.7% |
| Vincent Cable | Twickenham | LDem | (2005-2010) | 1.5% |
| Vincent Cable | Twickenham | LDem | (2010-2015) | 0.2% |
| Vincent Cable | Twickenham | LDem | (2017-2019) | 0.9% |
| Richard Caborn | Sheffield Central | Lab | (1997-2001) | 0.0% |
| Richard Caborn | Sheffield Central | Lab | (2001-2005) | 0.4% |
| Richard Caborn | Sheffield Central | Lab | (2005-2010) | 0.1% |
| Ruth Cadbury | Brentford and Isleworth | Lab | (2015-2017) | 1.2% |
| Ruth Cadbury | Brentford and Isleworth | Lab | (2017-2019) | 0.5% |
| Ruth Cadbury | Brentford and Isleworth | Lab | (2019-2024) | 0.0% |
| Ruth Cadbury | Brentford and Isleworth | Lab | (2024-present) | 0.0% |
| Lord Caine | (Lords) | Con | (2016-present) | 0.3% |
| Alun Cairns | Vale of Glamorgan | Con | (2010-2015) | 0.7% |
| Alun Cairns | Vale of Glamorgan | Con | (2015-2017) | 0.0% |
| Alun Cairns | Vale of Glamorgan | Con | (2017-2019) | 0.2% |
| Alun Cairns | Vale of Glamorgan | Con | (2019-2024) | 0.1% |
| David Cairns | Greenock and Inverclyde | Lab | (2001-2005) | 0.6% |
| David Cairns | Inverclyde | Lab | (2005-2010) | 0.6% |
| David Cairns | Inverclyde | Lab | (2010-2011) | 0.0% |
| The Earl of Caithness | (Lords) | Con | (1965-present) | 2.2% |
| Nesil Caliskan | Barking | Lab | (2024-present) | 2.8% |
| Amy Callaghan | East Dunbartonshire | SNP | (2019-2024) | 0.0% |
| Lord Callaghan of Cardiff | (Lords) | Lab | (1987-2005) | n/a |
| Lord Callanan | (Lords) | Con | (2014-present) | 0.4% |
| Patsy Calton | Cheadle | LDem | (2001-2005) | 1.8% |
| Patsy Calton | Cheadle | LDem | (2005-2005) | n/a |
| Cameron Buchanan | Lothian | Con | (2013-2016) | n/a |
| Lord Cameron of Chipping Norton | (Lords) | Con | (2023-present) | 2.7% |
| David Cameron | Witney | Con | (2001-2005) | 0.8% |
| David Cameron | Witney | Con | (2005-2010) | 2.8% |
| David Cameron | Witney | Con | (2010-2015) | 1.0% |
| David Cameron | Witney | Con | (2015-2016) | 0.0% |
| Lord Cameron of Dillington | (Lords) | Crossbench | (2004-present) | 31.3% |
| Lisa Cameron | East Kilbride, Strathaven and Lesmahagow | whilst Con | (2023-2024) | 0.0% |
| Lisa Cameron | East Kilbride, Strathaven and Lesmahagow | SNP | (2015-2017) | 0.3% |
| Lisa Cameron | East Kilbride, Strathaven and Lesmahagow | SNP | (2017-2019) | 0.3% |
| Lisa Cameron | East Kilbride, Strathaven and Lesmahagow | whilst SNP | (2019-2023) | 0.2% |
| Lord Cameron of Lochbroom | (Lords) | Crossbench | (1984-2016) | 24.3% |
| Lord Cameron of Lochiel | (Lords) | Con | (2024-present) | 0.0% |
| Lord Camoys | (Lords) | Con | (2023-present) | 0.0% |
| Campbell Martin | West of Scotland | whilst Independent | (2004-2007) | n/a |
| Campbell Martin | West of Scotland | whilst SNP | (2003-2004) | 3.4% |
| Lord Campbell-Savours | (Lords) | Lab | (2001-present) | 1.8% |
| Mr Dale Campbell-Savours | Workington | Lab | (1997-2001) | 1.5% |
| Markus Campbell-Savours | Penrith and Solway | Lab | (2024-present) | 1.0% |
| Alan Campbell | Tynemouth | Lab | (1997-2001) | 0.1% |
| Alan Campbell | Tynemouth | Lab | (2001-2005) | 0.2% |
| Alan Campbell | Tynemouth | Lab | (2005-2010) | 0.4% |
| Alan Campbell | Tynemouth | Lab | (2010-2015) | 0.7% |
| Alan Campbell | Tynemouth | Lab | (2015-2017) | 0.8% |
| Alan Campbell | Tynemouth | Lab | (2017-2019) | 1.0% |
| Alan Campbell | Tynemouth | Lab | (2019-2024) | 0.1% |
| Alan Campbell | Tynemouth | Lab | (2024-present) | 0.0% |
| Lord Campbell of Alloway | (Lords) | Con | (1981-2013) | 2.0% |
| Mrs Anne Campbell | Cambridge | Lab | (1997-2001) | 0.2% |
| Mrs Anne Campbell | Cambridge | Lab | (2001-2005) | 1.2% |
| Lord Campbell of Croy | (Lords) | Con | (1975-2005) | 0.7% |
| Gregory Campbell | East Londonderry | DUP | (2001-2005) | 0.0% |
| Gregory Campbell | East Londonderry | DUP | (2005-2010) | 0.2% |
| Gregory Campbell | East Londonderry | DUP | (2010-2015) | 0.5% |
| Gregory Campbell | East Londonderry | DUP | (2015-2017) | 0.0% |
| Gregory Campbell | East Londonderry | DUP | (2017-2019) | 0.3% |
| Gregory Campbell | East Londonderry | DUP | (2019-2024) | 0.4% |
| Gregory Campbell | East Londonderry | DUP | (2024-present) | 0.0% |
| Irene Campbell | North Ayrshire and Arran | Lab | (2024-present) | 0.0% |
| Juliet Campbell | Broxtowe | Lab | (2024-present) | 1.8% |
| Baroness Campbell of Loughborough | (Lords) | Crossbench | (2008-present) | 36.4% |
| Menzies Campbell | North East Fife | LDem | (2010-2015) | 0.6% |
| Menzies Campbell | North East Fife | LDem | (2005-2010) | 0.4% |
| Menzies Campbell | North East Fife | LDem | (2001-2005) | 2.4% |
| Menzies Campbell | North East Fife | LDem | (1997-2001) | 2.1% |
| Lord Campbell of Pittenweem | (Lords) | LDem | (2015-present) | 0.8% |
| Ronnie Campbell | Blyth Valley | Lab | (1997-2001) | 1.6% |
| Ronnie Campbell | Blyth Valley | Lab | (2001-2005) | 3.4% |
| Ronnie Campbell | Blyth Valley | Lab | (2005-2010) | 4.8% |
| Ronnie Campbell | Blyth Valley | Lab | (2010-2015) | 3.5% |
| Ronnie Campbell | Blyth Valley | Lab | (2015-2017) | 5.3% |
| Ronnie Campbell | Blyth Valley | Lab | (2017-2019) | 14.8% |
| Baroness Campbell of Surbiton | (Lords) | Crossbench | (2007-present) | 15.6% |
| Viscount Camrose | (Lords) | Con | (2022-present) | 0.0% |
| Dennis Canavan | Falkirk West | whilst Independent | (1999-2000) | n/a |
| Dennis Canavan | Falkirk West | whilst Lab | (1997-1999) | 4.2% |
| Charlotte Cane | Ely and East Cambridgeshire | LDem | (2024-present) | 0.0% |
| Mr Jamie Cann | Ipswich | Lab | (1997-2001) | 3.0% |
| Mr Jamie Cann | Ipswich | Lab | (2001-2001) | 18.2% |
| The Archbishop of Canterbury | (Lords) | Bishop | (2003-2012) | 0.0% |
| The Archbishop of Canterbury | (Lords) | Bishop | (1991-2002) | n/a |
| The Archbishop of Canterbury | (Lords) | Bishop | (2013-present) | 0.0% |
| Mr Ivor Caplin | Hove | Lab | (1997-2001) | 0.6% |
| Mr Ivor Caplin | Hove | Lab | (2001-2005) | 1.1% |
| Cara Hilton | Dunfermline | Lab | (2013-2016) | n/a |
| Dan Carden | Liverpool Walton | Lab | (2024-present) | 0.0% |
| Dan Carden | Liverpool, Walton | Lab | (2017-2019) | 0.3% |
| Dan Carden | Liverpool, Walton | Lab | (2019-2024) | 0.0% |
| Lord Carey of Clifton | (Lords) | Crossbench | (2002-present) | 47.0% |
| Lord Carlile of Berriew | (Lords) | Crossbench | (2017-present) | 21.1% |
| Lord Carlile of Berriew | (Lords) | LDem | (1999-2017) | 8.8% |
| Sam Carling | North West Cambridgeshire | Lab | (2024-present) | 0.0% |
| The Bishop of Carlisle | (Lords) | Bishop | (1996-2000) | n/a |
| The Bishop of Carlisle | (Lords) | Bishop | (2007-2009) | 0.0% |
| The Bishop of Carlisle | (Lords) | Bishop | (2013-2023) | 3.1% |
| Lord Carlisle of Bucklow | (Lords) | Con | (1987-2005) | 1.8% |
| Alistair Carmichael | Orkney and Shetland | LDem | (2001-2005) | 1.5% |
| Alistair Carmichael | Orkney and Shetland | LDem | (2005-2010) | 1.1% |
| Alistair Carmichael | Orkney and Shetland | LDem | (2010-2015) | 0.7% |
| Alistair Carmichael | Orkney and Shetland | LDem | (2015-2017) | 0.7% |
| Alistair Carmichael | Orkney and Shetland | LDem | (2017-2019) | 0.3% |
| Alistair Carmichael | Orkney and Shetland | LDem | (2019-2024) | 0.0% |
| Alistair Carmichael | Orkney and Shetland | LDem | (2024-present) | 0.8% |
| Lord Carmichael of Kelvingrove | (Lords) | Lab | (1983-2001) | n/a |
| Neil Carmichael | Stroud | Con | (2010-2015) | 1.1% |
| Neil Carmichael | Stroud | Con | (2015-2017) | 0.2% |
| The Earl of Carnarvon | (Lords) | Crossbench | (1987-2001) | 11.1% |
| Baroness Carnegy of Lour | (Lords) | Con | (1982-2010) | 1.2% |
| Alistair Carns | Birmingham Selly Oak | Lab | (2024-present) | 0.0% |
| Carol Mochan | South Scotland | Lab | (2021-present) | n/a |
| Carolyn Leckie | Central Scotland | SSP | (2003-2007) | 0.6% |
| Lord Carr of Hadley | (Lords) | Con | (1976-2012) | 0.0% |
| Lord Carrington | (Lords) | Con | (1999-2018) | 3.0% |
| Lord Carrington | (Lords) | Crossbench | (2018-present) | 71.7% |
| Lord Carrington of Fulham | (Lords) | Con | (2013-present) | 1.0% |
| Baroness Carr of Walton-on-the-Hill | (Lords) | Crossbench | (2023-present) | n/a |
| Lord Carswell | (Lords) | Crossbench | (2004-2019) | 27.0% |
| Douglas Carswell | Clacton | Con | (2010-2014) | 7.7% |
| Douglas Carswell | Clacton | UKIP | (2014-2015) | 0.0% |
| Douglas Carswell | Clacton | UKIP | (2015-2017) | 0.0% |
| Douglas Carswell | Harwich | Con | (2005-2010) | 2.6% |
| Lord Carter | (Lords) | Lab | (1987-2006) | 0.5% |
| Andy Carter | Warrington South | Con | (2019-2024) | 0.2% |
| Lord Carter of Barnes | (Lords) | Lab | (2008-2017) | 3.8% |
| Lord Carter of Barnes | (Lords) | Non-affiliated | (2017-present) | n/a |
| Lord Carter of Coles | (Lords) | Lab | (2004-present) | 0.7% |
| Lord Carter of Haslemere | (Lords) | Crossbench | (2019-present) | 55.6% |
| James Cartlidge | South Suffolk | Con | (2015-2017) | 0.0% |
| James Cartlidge | South Suffolk | Con | (2017-2019) | 1.8% |
| James Cartlidge | South Suffolk | Con | (2019-2024) | 0.0% |
| James Cartlidge | South Suffolk | Con | (2024-present) | 2.1% |
| Lord Carver | (Lords) | Crossbench | (1977-2001) | 28.6% |
| Mr Roger Casale | Wimbledon | Lab | (1997-2001) | 0.1% |
| Mr Roger Casale | Wimbledon | Lab | (2001-2005) | 0.9% |
| Baroness Casey of Blackstock | (Lords) | Crossbench | (2020-present) | 4.8% |
| Bill Cash | Stone | Con | (1997-2001) | 0.6% |
| Bill Cash | Stone | Con | (2001-2005) | 0.4% |
| Bill Cash | Stone | Con | (2005-2010) | 2.4% |
| Bill Cash | Stone | Con | (2010-2015) | 10.2% |
| Bill Cash | Stone | Con | (2015-2017) | 2.7% |
| Bill Cash | Stone | Con | (2017-2019) | 4.5% |
| Bill Cash | Stone | Con | (2019-2024) | 1.3% |
| Lord Cashman | (Lords) | Lab | (2014-2019) | 1.3% |
| Lord Cashman | (Lords) | Non-affiliated | (2019-present) | 7.7% |
| Baroness Cass | (Lords) | Crossbench | (2024-present) | 0.0% |
| Baroness Castle of Blackburn | (Lords) | Lab | (1990-2002) | 3.2% |
| Miriam Cates | Penistone and Stocksbridge | Con | (2019-2024) | 1.8% |
| Earl Cathcart | (Lords) | Con | (2007-present) | 1.1% |
| Cathie Craigie | Cumbernauld and Kilsyth | Lab | (2003-2007) | 0.5% |
| Cathie Craigie | Cumbernauld and Kilsyth | Lab | (1999-2003) | 0.9% |
| Cathie Craigie | Cumbernauld and Kilsyth | Lab | (2007-2011) | 0.4% |
| Cathy Jamieson | Carrick, Cumnock and Doon Valley | Lab | (2003-2007) | 0.0% |
| Cathy Jamieson | Carrick, Cumnock and Doon Valley | Lab | (1999-2003) | 0.1% |
| Cathy Jamieson | Carrick, Cumnock and Doon Valley | Lab | (2007-2011) | 0.2% |
| Cathy Peattie | Falkirk East | Lab | (2003-2007) | 0.6% |
| Cathy Peattie | Falkirk East | Lab | (1999-2003) | 1.1% |
| Cathy Peattie | Falkirk East | Lab | (2007-2011) | 1.3% |
| Martin Caton | Gower | Lab | (1997-2001) | 1.5% |
| Martin Caton | Gower | Lab | (2001-2005) | 2.6% |
| Martin Caton | Gower | Lab | (2005-2010) | 2.8% |
| Martin Caton | Gower | Lab | (2010-2015) | 0.6% |
| Maria Caulfield | Lewes | Con | (2015-2017) | 0.2% |
| Maria Caulfield | Lewes | Con | (2017-2019) | 2.3% |
| Maria Caulfield | Lewes | Con | (2019-2024) | 0.3% |
| Lord Cavendish of Furness | (Lords) | Con | (1990-2021) | 1.0% |
| Baroness Cavendish of Little Venice | (Lords) | Con | (2016-2016) | 0.0% |
| Baroness Cavendish of Little Venice | (Lords) | Crossbench | (2019-present) | 54.7% |
| Baroness Cavendish of Little Venice | (Lords) | Non-affiliated | (2016-2019) | 29.4% |
| Ian Cawsey | Brigg and Goole | Lab | (1997-2001) | 1.2% |
| Ian Cawsey | Brigg and Goole | Lab | (2001-2005) | 1.3% |
| Ian Cawsey | Brigg and Goole | Lab | (2005-2010) | 1.0% |
| Lord Chadlington | (Lords) | Con | (1996-present) | 0.2% |
| David Chadwick | Brecon, Radnor and Cwm Tawe | LDem | (2024-present) | 0.0% |
| Baroness Chakrabarti | (Lords) | Lab | (2016-present) | 0.3% |
| Lord Chalfont | (Lords) | Crossbench | (1964-2015) | 20.8% |
| Alex Chalk | Cheltenham | Con | (2015-2017) | 0.2% |
| Alex Chalk | Cheltenham | Con | (2017-2019) | 1.8% |
| Alex Chalk | Cheltenham | Con | (2019-2024) | 0.0% |
| Baroness Chalker of Wallasey | (Lords) | Con | (1992-2023) | 1.7% |
| Colin Challen | Morley and Rothwell | Lab | (2001-2005) | 1.8% |
| Colin Challen | Morley and Rothwell | Lab | (2005-2010) | 3.5% |
| Wendy Chamberlain | North East Fife | LDem | (2019-2024) | 0.0% |
| Wendy Chamberlain | North East Fife | LDem | (2024-present) | 0.0% |
| Danny Chambers | Winchester | LDem | (2024-present) | 0.0% |
| Sarah Champion | Rotherham | Lab | (2012-2015) | 0.0% |
| Sarah Champion | Rotherham | Lab | (2015-2017) | 0.6% |
| Sarah Champion | Rotherham | Lab | (2017-2019) | 2.3% |
| Sarah Champion | Rotherham | Lab | (2019-2024) | 0.1% |
| Sarah Champion | Rotherham | Lab | (2024-present) | 0.0% |
| Lord Chan | (Lords) | Crossbench | (2001-2006) | 31.5% |
| Viscount Chandos | (Lords) | Lab | (2000-present) | 0.9% |
| Baroness Chapman | (Lords) | Crossbench | (2004-2009) | 12.5% |
| Ben Chapman | Wirral South | Lab | (1997-2001) | 0.3% |
| Ben Chapman | Wirral South | Lab | (2001-2005) | 1.4% |
| Ben Chapman | Wirral South | Lab | (2005-2010) | 1.8% |
| Baroness Chapman of Darlington | (Lords) | Lab | (2021-present) | 0.2% |
| Douglas Chapman | Dunfermline and West Fife | SNP | (2015-2017) | 0.0% |
| Douglas Chapman | Dunfermline and West Fife | SNP | (2017-2019) | 0.0% |
| Douglas Chapman | Dunfermline and West Fife | SNP | (2019-2024) | 0.0% |
| Jenny Chapman | Darlington | Lab | (2010-2015) | 0.4% |
| Jenny Chapman | Darlington | Lab | (2015-2017) | 0.7% |
| Jenny Chapman | Darlington | Lab | (2017-2019) | 0.0% |
| Sir Sydney Chapman | Chipping Barnet | Con | (1997-2001) | 0.4% |
| Sir Sydney Chapman | Chipping Barnet | Con | (2001-2005) | 1.3% |
| Lord Chapple | (Lords) | Crossbench | (1985-2004) | n/a |
| Bambos Charalambous | Enfield, Southgate | whilst Independent | (2023-2024) | n/a |
| Bambos Charalambous | Enfield, Southgate | Lab | (2017-2019) | 0.0% |
| Bambos Charalambous | Enfield, Southgate | whilst Lab | (2019-2023) | 0.2% |
| Bambos Charalambous | Southgate and Wood Green | Lab | (2024-present) | 0.0% |
| Charlie Gordon | Glasgow Cathcart | Lab | (2005-2007) | 1.3% |
| Charlie Gordon | Glasgow Cathcart | Lab | (2007-2011) | 0.2% |
| Lord Charteris of Amisfield | (Lords) | Crossbench | (1978-1999) | n/a |
| Luke Charters | York Outer | Lab | (2024-present) | 0.0% |
| Lord Chartres | (Lords) | Crossbench | (2017-present) | 37.9% |
| David Chaytor | Bury North | Lab | (1997-2001) | 2.4% |
| David Chaytor | Bury North | Lab | (2001-2005) | 2.3% |
| David Chaytor | Bury North | Lab | (2005-2010) | 0.9% |
| The Bishop of Chelmsford | (Lords) | Bishop | (2000-2003) | 6.7% |
| The Bishop of Chelmsford | (Lords) | Bishop | (2014-2020) | 0.0% |
| The Bishop of Chelmsford | (Lords) | Bishop | (2003-2009) | 7.1% |
| The Bishop of Chelmsford | (Lords) | Bishop | (2021-present) | 0.0% |
| Joanna Cherry | Edinburgh South West | SNP | (2015-2017) | 0.0% |
| Joanna Cherry | Edinburgh South West | SNP | (2017-2019) | 0.0% |
| Joanna Cherry | Edinburgh South West | SNP | (2019-2024) | 0.0% |
| The Bishop of Chester | (Lords) | Bishop | (2001-2019) | 5.7% |
| Chic Brodie | South Scotland | SNP | (2011-2016) | n/a |
| The Bishop of Chichester | (Lords) | Bishop | (1978-2001) | 0.0% |
| The Bishop of Chichester | (Lords) | Bishop | (2008-2012) | 0.0% |
| The Bishop of Chichester | (Lords) | Bishop | (2018-present) | 11.1% |
| Lord Chidgey | (Lords) | LDem | (2005-2022) | 1.1% |
| Mr David Chidgey | Eastleigh | LDem | (1997-2001) | 1.5% |
| Mr David Chidgey | Eastleigh | LDem | (2001-2005) | 1.5% |
| Lord Chilver | (Lords) | Con | (1987-2012) | 0.0% |
| Malcolm Chisholm | Edinburgh North and Leith | Lab | (1997-2001) | 0.8% |
| Baroness Chisholm of Owlpen | (Lords) | Con | (2014-present) | 0.3% |
| Rehman Chishti | Gillingham and Rainham | Con | (2010-2015) | 0.8% |
| Rehman Chishti | Gillingham and Rainham | Con | (2015-2017) | 0.0% |
| Rehman Chishti | Gillingham and Rainham | Con | (2017-2019) | 2.4% |
| Rehman Chishti | Gillingham and Rainham | Con | (2019-2024) | 3.0% |
| Lord Chitnis | (Lords) | Crossbench | (1977-2013) | n/a |
| The Marquess of Cholmondeley | (Lords) | Crossbench | (1990-2010) | n/a |
| The Marquess of Cholmondeley | (Lords) | Non-affiliated | (2010-2022) | n/a |
| Christopher Chope | Christchurch | Con | (1997-2001) | 2.4% |
| Christopher Chope | Christchurch | Con | (2001-2005) | 1.6% |
| Christopher Chope | Christchurch | Con | (2005-2010) | 5.8% |
| Christopher Chope | Christchurch | Con | (2010-2015) | 18.9% |
| Christopher Chope | Christchurch | Con | (2015-2017) | 4.5% |
| Christopher Chope | Christchurch | Con | (2017-2019) | 5.4% |
| Christopher Chope | Christchurch | Con | (2019-2024) | 7.1% |
| Christopher Chope | Christchurch | Con | (2024-present) | 1.0% |
| Lord Chorley | (Lords) | Crossbench | (2001-2014) | 20.2% |
| Lord Choudrey | (Lords) | Con | (2019-present) | 0.0% |
| Ellie Chowns | North Herefordshire | Green | (2024-present) | 0.0% |
| Chris Ballance | South of Scotland | Green | (2003-2007) | 0.4% |
| Christian Allard | North East Scotland | SNP | (2013-2016) | n/a |
| Christina McKelvie | Central Scotland | SNP | (2007-2011) | 0.0% |
| Christina McKelvie | Hamilton, Larkhall and Stonehouse | SNP | (2011-2016) | n/a |
| Christina McKelvie | Hamilton, Larkhall and Stonehouse | SNP | (2016-2021) | n/a |
| Christina McKelvie | Hamilton, Larkhall and Stonehouse | SNP | (2021-present) | n/a |
| Christine May | Central Fife | Lab | (2003-2007) | 0.5% |
| Christine Grahame | Midlothian South, Tweeddale and Lauderdale | SNP | (2011-2016) | n/a |
| Christine Grahame | Midlothian South, Tweeddale and Lauderdale | SNP | (2016-2021) | n/a |
| Christine Grahame | Midlothian South, Tweeddale and Lauderdale | SNP | (2021-present) | n/a |
| Christine Grahame | South of Scotland | SNP | (2003-2007) | 1.2% |
| Christine Grahame | South of Scotland | SNP | (1999-2003) | 4.1% |
| Christine Grahame | South of Scotland | SNP | (2007-2011) | 0.3% |
| Lord Christopher | (Lords) | Lab | (1998-present) | 0.3% |
| Christopher Harvie | Mid Scotland and Fife | SNP | (2007-2011) | 0.8% |
| Jo Churchill | Bury St Edmunds | Con | (2015-2017) | 0.0% |
| Jo Churchill | Bury St Edmunds | Con | (2017-2019) | 1.4% |
| Jo Churchill | Bury St Edmunds | Con | (2019-2024) | 0.2% |
| Ms Judith Church | Dagenham | Lab | (1997-2001) | 0.5% |
| Claire Baker | Mid Scotland and Fife | Lab | (2011-2016) | n/a |
| Claire Baker | Mid Scotland and Fife | Lab | (2007-2011) | 0.2% |
| Claire Baker | Mid Scotland and Fife | Lab | (2016-2021) | n/a |
| Claire Baker | Mid Scotland and Fife | Lab | (2021-present) | n/a |
| The Earl of Clancarty | (Lords) | Crossbench | (2010-present) | 21.2% |
| Michael Clapham | Barnsley West and Penistone | Lab | (1997-2001) | 2.0% |
| Michael Clapham | Barnsley West and Penistone | Lab | (2001-2005) | 4.2% |
| Michael Clapham | Barnsley West and Penistone | Lab | (2005-2010) | 3.1% |
| James Clappison | Hertsmere | Con | (1997-2001) | 0.3% |
| James Clappison | Hertsmere | Con | (2001-2005) | 0.8% |
| James Clappison | Hertsmere | Con | (2005-2010) | 2.9% |
| James Clappison | Hertsmere | Con | (2010-2015) | 3.8% |
| Clare Adamson | Central Scotland | SNP | (2011-2016) | n/a |
| Clare Adamson | Motherwell and Wishaw | SNP | (2016-2021) | n/a |
| Clare Adamson | Motherwell and Wishaw | SNP | (2021-present) | n/a |
| Clare Haughey | Rutherglen | SNP | (2016-2021) | n/a |
| Clare Haughey | Rutherglen | SNP | (2021-present) | n/a |
| Mr Alan Clark | Kensington and Chelsea | Con | (1997-1999) | 0.7% |
| Baroness Clark of Calton | (Lords) | Judge | (2005-present) | 6.6% |
| Colin Clark | Gordon | Con | (2017-2019) | 0.5% |
| Dr David Clark | South Shields | Lab | (1997-2001) | 1.1% |
| Brendan Clarke-Smith | Bassetlaw | Con | (2019-2024) | 1.0% |
| Charles Clarke | Norwich South | Lab | (1997-2001) | 0.3% |
| Charles Clarke | Norwich South | Lab | (2001-2005) | 0.8% |
| Charles Clarke | Norwich South | Lab | (2005-2010) | 0.8% |
| Mr Eric Clarke | Midlothian | Lab | (1997-2001) | 0.6% |
| Lord Clarke of Hampstead | (Lords) | Lab | (1998-present) | 2.6% |
| Kenneth Clarke | Rushcliffe | Con | (1997-2001) | 0.9% |
| Kenneth Clarke | Rushcliffe | Con | (2001-2005) | 4.3% |
| Kenneth Clarke | Rushcliffe | Con | (2005-2010) | 6.5% |
| Kenneth Clarke | Rushcliffe | Con | (2010-2015) | 0.4% |
| Kenneth Clarke | Rushcliffe | Con | (2015-2017) | 4.6% |
| Kenneth Clarke | Rushcliffe | whilst Con | (2017-2019) | 26.4% |
| Kenneth Clarke | Rushcliffe | whilst Independent | (2019-2019) | n/a |
| Lord Clarke of Nottingham | (Lords) | Con | (2020-present) | 10.9% |
| Simon Clarke | Middlesbrough South and East Cleveland | Con | (2017-2019) | 3.0% |
| Simon Clarke | Middlesbrough South and East Cleveland | Con | (2019-2024) | 0.8% |
| Lord Clarke of Stone-cum-Ebony | (Lords) | Judge | (2009-2020) | 0.0% |
| Theo Clarke | Stafford | Con | (2019-2024) | 0.3% |
| Tom Clarke | Coatbridge and Chryston | Lab | (1997-2001) | 1.2% |
| Tom Clarke | Coatbridge and Chryston | Lab | (2001-2005) | 0.9% |
| Tom Clarke | Coatbridge, Chryston and Bellshill | Lab | (2005-2010) | 2.4% |
| Tom Clarke | Coatbridge, Chryston and Bellshill | Lab | (2010-2015) | 0.7% |
| Mr Tony Clarke | Northampton South | Lab | (1997-2001) | 2.0% |
| Mr Tony Clarke | Northampton South | Lab | (2001-2005) | 3.7% |
| Feryal Clark | Enfield North | Lab | (2019-2024) | 0.2% |
| Feryal Clark | Enfield North | Lab | (2024-present) | 2.5% |
| Greg Clark | Tunbridge Wells | Con | (2005-2010) | 2.2% |
| Greg Clark | Tunbridge Wells | Con | (2010-2015) | 0.7% |
| Greg Clark | Tunbridge Wells | Con | (2015-2017) | 0.3% |
| Greg Clark | Tunbridge Wells | whilst Con | (2017-2019) | 1.4% |
| Greg Clark | Tunbridge Wells | Con | (2019-2024) | 0.7% |
| Greg Clark | Tunbridge Wells | whilst Independent | (2019-2019) | n/a |
| Ms Helen Clark | Peterborough | Lab | (1997-2001) | 1.0% |
| Ms Helen Clark | Peterborough | Lab | (2001-2005) | 2.0% |
| Katy Clark | North Ayrshire and Arran | Lab | (2010-2015) | 1.5% |
| Katy Clark | North Ayrshire and Arran | Lab | (2005-2010) | 5.8% |
| Lord Clark of Kempston | (Lords) | Con | (1992-2004) | 0.0% |
| Baroness Clark of Kilwinning | (Lords) | Lab | (2020-present) | 1.8% |
| Dr Lynda Clark | Edinburgh Pentlands | Lab | (1997-2001) | 0.2% |
| Dr Lynda Clark | Edinburgh Pentlands | Lab | (2001-2005) | 0.4% |
| Dr Michael Clark | Rayleigh | Con | (1997-2001) | 0.8% |
| Paul Clark | Gillingham | Lab | (1997-2001) | 0.0% |
| Paul Clark | Gillingham | Lab | (2001-2005) | 0.6% |
| Paul Clark | Gillingham | Lab | (2005-2010) | 0.2% |
| Chris Clarkson | Heywood and Middleton | Con | (2019-2024) | 0.5% |
| Lord Clark of Windermere | (Lords) | Lab | (2001-present) | 0.9% |
| Claudia Beamish | South Scotland | Lab | (2011-2016) | n/a |
| Claudia Beamish | South Scotland | Lab | (2016-2021) | n/a |
| Lord Cledwyn of Penrhos | (Lords) | Lab | (1979-2001) | 4.4% |
| Nick Clegg | Sheffield, Hallam | LDem | (2005-2010) | 0.7% |
| Nick Clegg | Sheffield, Hallam | LDem | (2010-2015) | 0.4% |
| Nick Clegg | Sheffield, Hallam | LDem | (2015-2017) | 0.7% |
| David Clelland | Tyne Bridge | Lab | (1997-2001) | 0.1% |
| David Clelland | Tyne Bridge | Lab | (2001-2005) | 0.9% |
| David Clelland | Tyne Bridge | Lab | (2005-2010) | 1.6% |
| Lord Clement-Jones | (Lords) | LDem | (1998-present) | 1.3% |
| James Cleverly | Braintree | Con | (2015-2017) | 0.0% |
| James Cleverly | Braintree | Con | (2017-2019) | 0.2% |
| James Cleverly | Braintree | Con | (2019-2024) | 0.0% |
| James Cleverly | Braintree | Con | (2024-present) | 0.0% |
| Geoffrey Clifton-Brown | Cotswold | Con | (1997-2001) | 0.2% |
| Geoffrey Clifton-Brown | Cotswold | Con | (2001-2005) | 1.1% |
| Geoffrey Clifton-Brown | Cotswold | Con | (2005-2010) | 1.7% |
| Geoffrey Clifton-Brown | North Cotswolds | Con | (2024-present) | 2.3% |
| Geoffrey Clifton-Brown | The Cotswolds | Con | (2010-2015) | 1.6% |
| Geoffrey Clifton-Brown | The Cotswolds | Con | (2015-2017) | 0.3% |
| Geoffrey Clifton-Brown | The Cotswolds | Con | (2017-2019) | 2.4% |
| Geoffrey Clifton-Brown | The Cotswolds | Con | (2019-2024) | 1.3% |
| Lord Clinton-Davis | (Lords) | Lab | (1990-2018) | 1.8% |
| Ann Clwyd | Cynon Valley | Lab | (1997-2001) | 3.0% |
| Ann Clwyd | Cynon Valley | Lab | (2001-2005) | 2.6% |
| Ann Clwyd | Cynon Valley | Lab | (2005-2010) | 0.7% |
| Ann Clwyd | Cynon Valley | Lab | (2010-2015) | 1.6% |
| Ann Clwyd | Cynon Valley | Lab | (2015-2017) | 1.9% |
| Ann Clwyd | Cynon Valley | Lab | (2017-2019) | 2.4% |
| Lord Clyde | (Lords) | Crossbench | (1996-2009) | 0.0% |
| Lord Coaker | (Lords) | Lab | (2021-present) | 0.2% |
| Vernon Coaker | Gedling | Lab | (1997-2001) | 0.1% |
| Vernon Coaker | Gedling | Lab | (2001-2005) | 0.5% |
| Vernon Coaker | Gedling | Lab | (2005-2010) | 0.4% |
| Vernon Coaker | Gedling | Lab | (2010-2015) | 0.2% |
| Vernon Coaker | Gedling | Lab | (2015-2017) | 0.6% |
| Vernon Coaker | Gedling | Lab | (2017-2019) | 0.0% |
| Lord Cobbold | (Lords) | Crossbench | (1987-2014) | 17.9% |
| Lord Cockfield | (Lords) | Con | (1978-2007) | 3.8% |
| Lewis Cocking | Broxbourne | Con | (2024-present) | 0.7% |
| Lord Cocks of Hartcliffe | (Lords) | Lab | (1987-2001) | 5.8% |
| Lord Coe | (Lords) | Con | (2000-2022) | 0.7% |
| Ann Coffey | Stockport | whilst Independent | (2019-2019) | n/a |
| Ann Coffey | Stockport | Lab | (1997-2001) | 0.1% |
| Ann Coffey | Stockport | Lab | (2001-2005) | 0.2% |
| Ann Coffey | Stockport | Lab | (2005-2010) | 0.6% |
| Ann Coffey | Stockport | Lab | (2010-2015) | 0.2% |
| Ann Coffey | Stockport | Lab | (2015-2017) | 2.1% |
| Ann Coffey | Stockport | whilst Lab | (2017-2019) | 0.9% |
| Therese Coffey | Suffolk Coastal | Con | (2010-2015) | 1.5% |
| Therese Coffey | Suffolk Coastal | Con | (2015-2017) | 0.0% |
| Therese Coffey | Suffolk Coastal | Con | (2017-2019) | 0.5% |
| Therese Coffey | Suffolk Coastal | Con | (2019-2024) | 0.0% |
| Lord Coggan | (Lords) | Crossbench | (1980-2000) | n/a |
| Chris Coghlan | Dorking and Horley | LDem | (2024-present) | 0.0% |
| Harry Cohen | Leyton and Wanstead | Lab | (1997-2001) | 2.2% |
| Harry Cohen | Leyton and Wanstead | Lab | (2001-2005) | 4.0% |
| Harry Cohen | Leyton and Wanstead | Lab | (2005-2010) | 3.4% |
| Baroness Cohen of Pimlico | (Lords) | Lab | (2000-present) | 2.2% |
| Elliot Colburn | Carshalton and Wallington | Con | (2019-2024) | 1.2% |
| Ben Coleman | Chelsea and Fulham | Lab | (2024-present) | 1.2% |
| Mr Iain Coleman | Hammersmith and Fulham | Lab | (1997-2001) | 0.6% |
| Mr Iain Coleman | Hammersmith and Fulham | Lab | (2001-2005) | 4.4% |
| Lord Colgrain | (Lords) | Con | (2017-present) | 0.0% |
| Colin Keir | Edinburgh Western | SNP | (2011-2016) | n/a |
| Colin Fox | Lothians | SSP | (2003-2007) | 0.9% |
| Colin Beattie | Midlothian North and Musselburgh | SNP | (2011-2016) | n/a |
| Colin Beattie | Midlothian North and Musselburgh | SNP | (2016-2021) | n/a |
| Colin Beattie | Midlothian North and Musselburgh | SNP | (2021-present) | n/a |
| Colin Smyth | South Scotland | Lab | (2016-2021) | n/a |
| Colin Smyth | South Scotland | Lab | (2021-present) | n/a |
| Colin Campbell | West of Scotland | SNP | (1999-2003) | 0.9% |
| Collette Stevenson | East Kilbride | SNP | (2021-present) | n/a |
| Jacob Collier | Burton and Uttoxeter | Lab | (2024-present) | 0.6% |
| Lizzi Collinge | Morecambe and Lunesdale | Lab | (2024-present) | 0.0% |
| Damian Collins | Folkestone and Hythe | Con | (2010-2015) | 0.6% |
| Damian Collins | Folkestone and Hythe | Con | (2015-2017) | 0.0% |
| Damian Collins | Folkestone and Hythe | Con | (2017-2019) | 3.5% |
| Damian Collins | Folkestone and Hythe | Con | (2019-2024) | 0.5% |
| Lord Collins of Highbury | (Lords) | Lab | (2011-present) | 0.2% |
| Lord Collins of Mapesbury | (Lords) | Judge | (2009-present) | 0.0% |
| Mr Tim Collins | Westmorland and Lonsdale | Con | (1997-2001) | 0.0% |
| Mr Tim Collins | Westmorland and Lonsdale | Con | (2001-2005) | 0.4% |
| Tom Collins | Worcester | Lab | (2024-present) | 1.6% |
| Victoria Collins | Harpenden and Berkhamsted | LDem | (2024-present) | 0.0% |
| Mr Tony Colman | Putney | Lab | (1997-2001) | 0.6% |
| Mr Tony Colman | Putney | Lab | (2001-2005) | 2.3% |
| Oliver Colvile | Plymouth, Sutton and Devonport | Con | (2010-2015) | 0.8% |
| Oliver Colvile | Plymouth, Sutton and Devonport | Con | (2015-2017) | 0.0% |
| Viscount Colville of Culross | (Lords) | Crossbench | (1945-2010) | 20.7% |
| Viscount Colville of Culross | (Lords) | Crossbench | (2011-present) | 25.6% |
| Mr Michael Colvin | Romsey | Con | (1997-2000) | 0.3% |
| Lord Colwyn | (Lords) | Con | (1966-2022) | 1.2% |
| Lord Condon | (Lords) | Crossbench | (2001-2017) | 22.9% |
| Liam Conlon | Beckenham and Penge | Lab | (2024-present) | 1.6% |
| Michael Connarty | Falkirk East | Lab | (1997-2001) | 2.9% |
| Michael Connarty | Falkirk East | Lab | (2001-2005) | 5.0% |
| Michael Connarty | Linlithgow and East Falkirk | Lab | (2005-2010) | 2.0% |
| Michael Connarty | Linlithgow and East Falkirk | Lab | (2010-2015) | 1.5% |
| Lord Constantine of Stanmore | (Lords) | Con | (1981-2004) | n/a |
| Derek Conway | Old Bexley and Sidcup | Con | (2001-2005) | 1.8% |
| Derek Conway | Old Bexley and Sidcup | whilst Con | (2005-2008) | 0.6% |
| Derek Conway | Old Bexley and Sidcup | whilst Independent | (2008-2010) | n/a |
| Lord Cooke of Islandreagh | (Lords) | Crossbench | (1992-2007) | 21.2% |
| Lord Cooke of Thorndon | (Lords) | Crossbench | (1996-2006) | 40.0% |
| Frank Cook | Stockton North | Lab | (1997-2001) | 3.5% |
| Frank Cook | Stockton North | Lab | (2001-2005) | 3.9% |
| Frank Cook | Stockton North | Lab | (2005-2010) | 6.0% |
| Robin Cook | Livingston | Lab | (1997-2001) | 0.5% |
| Robin Cook | Livingston | Lab | (2001-2005) | 2.3% |
| Robin Cook | Livingston | Lab | (2005-2005) | 0.0% |
| Sarah Coombes | West Bromwich | Lab | (2024-present) | 0.0% |
| Andrew Cooper | Mid Cheshire | Lab | (2024-present) | 0.0% |
| Beccy Cooper | Worthing West | Lab | (2024-present) | 0.0% |
| Daisy Cooper | St Albans | LDem | (2019-2024) | 0.0% |
| Daisy Cooper | St Albans | LDem | (2024-present) | 0.0% |
| John Cooper | Dumfries and Galloway | Con | (2024-present) | 0.7% |
| Julie Cooper | Burnley | Lab | (2015-2017) | 0.0% |
| Julie Cooper | Burnley | Lab | (2017-2019) | 0.3% |
| Rosie Cooper | West Lancashire | Lab | (2005-2010) | 1.7% |
| Rosie Cooper | West Lancashire | Lab | (2010-2015) | 2.0% |
| Rosie Cooper | West Lancashire | Lab | (2015-2017) | 1.5% |
| Rosie Cooper | West Lancashire | Lab | (2017-2019) | 6.9% |
| Rosie Cooper | West Lancashire | Lab | (2019-2022) | 0.7% |
| Lord Cooper of Windrush | (Lords) | Con | (2014-2019) | 14.6% |
| Lord Cooper of Windrush | (Lords) | Non-affiliated | (2019-present) | 15.4% |
| Yvette Cooper | Normanton, Pontefract and Castleford | Lab | (2010-2015) | 0.0% |
| Yvette Cooper | Normanton, Pontefract and Castleford | Lab | (2015-2017) | 0.7% |
| Yvette Cooper | Normanton, Pontefract and Castleford | Lab | (2017-2019) | 0.0% |
| Yvette Cooper | Normanton, Pontefract and Castleford | Lab | (2019-2024) | 0.0% |
| Yvette Cooper | Pontefract and Castleford | Lab | (1997-2001) | 0.4% |
| Yvette Cooper | Pontefract and Castleford | Lab | (2001-2005) | 0.3% |
| Yvette Cooper | Pontefract and Castleford | Lab | (2005-2010) | 0.9% |
| Yvette Cooper | Pontefract, Castleford and Knottingley | Lab | (2024-present) | 0.0% |
| Lord Cope of Berkeley | (Lords) | Con | (1997-2020) | 1.1% |
| Lord Corbett of Castle Vale | (Lords) | Lab | (2001-2012) | 0.4% |
| Mr Robin Corbett | Birmingham, Erdington | Lab | (1997-2001) | 0.8% |
| Jeremy Corbyn | Islington North | whilst Independent | (2020-2024) | n/a |
| Jeremy Corbyn | Islington North | Independent | (2024-present) | n/a |
| Jeremy Corbyn | Islington North | Lab | (1997-2001) | 8.7% |
| Jeremy Corbyn | Islington North | Lab | (2001-2005) | 23.6% |
| Jeremy Corbyn | Islington North | Lab | (2005-2010) | 25.1% |
| Jeremy Corbyn | Islington North | Lab | (2010-2015) | 5.1% |
| Jeremy Corbyn | Islington North | Lab | (2015-2017) | 0.8% |
| Jeremy Corbyn | Islington North | Lab | (2017-2019) | 0.3% |
| Jeremy Corbyn | Islington North | whilst Lab | (2019-2020) | 0.0% |
| The Earl of Cork and Orrery | (Lords) | Crossbench | (2016-present) | 30.5% |
| Lord Cormack | (Lords) | Con | (2010-2024) | 14.0% |
| Patrick Cormack | South Staffordshire | Con | (2005-2010) | 1.7% |
| Patrick Cormack | South Staffordshire | Con | (1997-2001) | 0.2% |
| Patrick Cormack | South Staffordshire | Con | (2001-2005) | 2.0% |
| Baroness Corston | (Lords) | Lab | (2005-2024) | 0.6% |
| Ms Jean Corston | Bristol East | Lab | (1997-2001) | 0.0% |
| Ms Jean Corston | Bristol East | Lab | (2001-2005) | 0.6% |
| Alberto Costa | South Leicestershire | Con | (2015-2017) | 0.0% |
| Alberto Costa | South Leicestershire | Con | (2017-2019) | 2.2% |
| Alberto Costa | South Leicestershire | Con | (2019-2024) | 0.0% |
| Alberto Costa | South Leicestershire | Con | (2024-present) | 0.0% |
| Deirdre Costigan | Ealing Southall | Lab | (2024-present) | 0.5% |
| Lord Cotter | (Lords) | LDem | (2006-2023) | 3.2% |
| Mr Brian Cotter | Weston-Super-Mare | LDem | (1997-2001) | 1.0% |
| Mr Brian Cotter | Weston-Super-Mare | LDem | (2001-2005) | 1.8% |
| The Earl of Courtown | (Lords) | Con | (1975-present) | 0.6% |
| Robert Courts | Witney | Con | (2016-2017) | 0.0% |
| Robert Courts | Witney | Con | (2017-2019) | 2.1% |
| Robert Courts | Witney | Con | (2019-2024) | 0.2% |
| Jim Cousins | Newcastle upon Tyne Central | Lab | (1997-2001) | 2.4% |
| Jim Cousins | Newcastle upon Tyne Central | Lab | (2001-2005) | 5.0% |
| Jim Cousins | Newcastle upon Tyne Central | Lab | (2005-2010) | 4.6% |
| Baroness Coussins | (Lords) | Crossbench | (2007-present) | 9.9% |
| Claire Coutinho | East Surrey | Con | (2019-2024) | 0.5% |
| Claire Coutinho | East Surrey | Con | (2024-present) | 0.0% |
| Baroness Couttie | (Lords) | Con | (2016-2022) | 0.6% |
| The Bishop of Coventry | (Lords) | Bishop | (2003-2008) | 0.0% |
| The Bishop of Coventry | (Lords) | Bishop | (2013-2023) | 0.0% |
| Ronnie Cowan | Inverclyde | SNP | (2015-2017) | 0.0% |
| Ronnie Cowan | Inverclyde | SNP | (2017-2019) | 0.0% |
| Ronnie Cowan | Inverclyde | SNP | (2019-2024) | 0.0% |
| Lord Cowdrey of Tonbridge | (Lords) | Con | (1997-2000) | 0.0% |
| Baroness Cox | (Lords) | Con | (1983-2004) | 0.6% |
| Baroness Cox | (Lords) | Crossbench | (2004-present) | 31.5% |
| Geoffrey Cox | Torridge and Tavistock | Con | (2024-present) | 0.0% |
| Geoffrey Cox | Torridge and West Devon | Con | (2005-2010) | 0.4% |
| Geoffrey Cox | Torridge and West Devon | Con | (2010-2015) | 1.6% |
| Geoffrey Cox | Torridge and West Devon | Con | (2015-2017) | 0.9% |
| Geoffrey Cox | Torridge and West Devon | Con | (2017-2019) | 0.5% |
| Geoffrey Cox | Torridge and West Devon | Con | (2019-2024) | 0.1% |
| Jo Cox | Batley and Spen | Lab | (2015-2016) | 0.6% |
| Pam Cox | Colchester | Lab | (2024-present) | 0.0% |
| Mr Tom Cox | Tooting | Lab | (1997-2001) | 0.5% |
| Mr Tom Cox | Tooting | Lab | (2001-2005) | 3.4% |
| Neil Coyle | Bermondsey and Old Southwark | Lab | (2015-2017) | 1.7% |
| Neil Coyle | Bermondsey and Old Southwark | Lab | (2017-2019) | 0.3% |
| Neil Coyle | Bermondsey and Old Southwark | Lab | (2019-2024) | 0.0% |
| Neil Coyle | Bermondsey and Old Southwark | Lab | (2024-present) | 0.6% |
| Stephen Crabb | Preseli Pembrokeshire | Con | (2005-2010) | 1.2% |
| Stephen Crabb | Preseli Pembrokeshire | Con | (2010-2015) | 0.1% |
| Stephen Crabb | Preseli Pembrokeshire | Con | (2015-2017) | 0.0% |
| Stephen Crabb | Preseli Pembrokeshire | Con | (2017-2019) | 2.4% |
| Stephen Crabb | Preseli Pembrokeshire | Con | (2019-2024) | 0.3% |
| Jennifer Craft | Thurrock | Lab | (2024-present) | 1.8% |
| Craig Hoy | South Scotland | Con | (2021-present) | n/a |
| Viscount Craigavon | (Lords) | Crossbench | (1974-present) | 35.4% |
| Lord Craig of Radley | (Lords) | Crossbench | (1991-present) | 30.0% |
| Mr James Cran | Beverley and Holderness | Con | (1997-2001) | 0.5% |
| Mr James Cran | Beverley and Holderness | Con | (2001-2005) | 1.0% |
| Professor Ross Cranston | Dudley North | Lab | (1997-2001) | 0.1% |
| Professor Ross Cranston | Dudley North | Lab | (2001-2005) | 0.9% |
| Lord Crathorne | (Lords) | Con | (1977-present) | 0.6% |
| David Crausby | Bolton North East | Lab | (1997-2001) | 0.6% |
| David Crausby | Bolton North East | Lab | (2001-2005) | 3.3% |
| David Crausby | Bolton North East | Lab | (2005-2010) | 2.5% |
| David Crausby | Bolton North East | Lab | (2010-2015) | 2.0% |
| David Crausby | Bolton North East | Lab | (2015-2017) | 0.0% |
| David Crausby | Bolton North East | Lab | (2017-2019) | 0.0% |
| The Earl of Crawford and Balcarres | (Lords) | Con | (1974-2019) | 2.6% |
| Baroness Crawley | (Lords) | Lab | (1998-present) | 0.3% |
| Angela Crawley | Lanark and Hamilton East | SNP | (2015-2017) | 0.0% |
| Angela Crawley | Lanark and Hamilton East | SNP | (2017-2019) | 0.0% |
| Angela Crawley | Lanark and Hamilton East | SNP | (2019-2024) | 0.0% |
| Mary Creagh | Coventry East | Lab | (2024-present) | 2.2% |
| Mary Creagh | Wakefield | Lab | (2005-2010) | 1.8% |
| Mary Creagh | Wakefield | Lab | (2010-2015) | 0.1% |
| Mary Creagh | Wakefield | Lab | (2015-2017) | 2.0% |
| Mary Creagh | Wakefield | Lab | (2017-2019) | 0.6% |
| Stella Creasy | Walthamstow | Lab | (2010-2015) | 0.1% |
| Stella Creasy | Walthamstow | Lab | (2015-2017) | 2.0% |
| Stella Creasy | Walthamstow | Lab | (2017-2019) | 0.3% |
| Stella Creasy | Walthamstow | Lab | (2019-2024) | 0.0% |
| Stella Creasy | Walthamstow | Lab | (2024-present) | 0.0% |
| Torcuil Crichton | Na h-Eileanan an Iar | Lab | (2024-present) | 1.7% |
| Lord Crickhowell | (Lords) | Con | (1987-2018) | 1.4% |
| Lord Crisp | (Lords) | Crossbench | (2006-present) | 15.0% |
| Michael Crockart | Edinburgh West | LDem | (2010-2015) | 2.2% |
| Lord Croham | (Lords) | Crossbench | (1978-2011) | 13.2% |
| Lord Cromwell | (Lords) | Crossbench | (2014-present) | 21.4% |
| Virginia Crosbie | Ynys Môn | Con | (2019-2024) | 0.3% |
| Harriet Cross | Gordon and Buchan | Con | (2024-present) | 0.6% |
| Tracey Crouch | Chatham and Aylesford | Con | (2010-2015) | 2.7% |
| Tracey Crouch | Chatham and Aylesford | Con | (2015-2017) | 0.3% |
| Tracey Crouch | Chatham and Aylesford | Con | (2017-2019) | 2.1% |
| Tracey Crouch | Chatham and Aylesford | Con | (2019-2024) | 2.7% |
| Lord Cruddas | (Lords) | Con | (2021-present) | 0.2% |
| Jon Cruddas | Dagenham | Lab | (2001-2005) | 1.0% |
| Jon Cruddas | Dagenham | Lab | (2005-2010) | 2.8% |
| Jon Cruddas | Dagenham and Rainham | Lab | (2010-2015) | 0.6% |
| Jon Cruddas | Dagenham and Rainham | Lab | (2015-2017) | 0.3% |
| Jon Cruddas | Dagenham and Rainham | Lab | (2017-2019) | 1.6% |
| Jon Cruddas | Dagenham and Rainham | Lab | (2019-2024) | 0.1% |
| Lord Cryer | (Lords) | Lab | (2024-present) | 0.0% |
| Ann Cryer | Keighley | Lab | (1997-2001) | 2.8% |
| Ann Cryer | Keighley | Lab | (2001-2005) | 3.3% |
| Ann Cryer | Keighley | Lab | (2005-2010) | 2.0% |
| John Cryer | Hornchurch | Lab | (1997-2001) | 3.2% |
| John Cryer | Hornchurch | Lab | (2001-2005) | 5.7% |
| John Cryer | Leyton and Wanstead | Lab | (2010-2015) | 1.8% |
| John Cryer | Leyton and Wanstead | Lab | (2015-2017) | 0.7% |
| John Cryer | Leyton and Wanstead | Lab | (2017-2019) | 0.6% |
| John Cryer | Leyton and Wanstead | Lab | (2019-2024) | 0.0% |
| Lord Cuckney | (Lords) | Con | (1995-2008) | 0.7% |
| Pat Cullen | Fermanagh and South Tyrone | SF | (2024-present) | n/a |
| Lord Cullen of Whitekirk | (Lords) | Crossbench | (2003-2019) | 0.0% |
| Baroness Cumberlege | (Lords) | Con | (1990-present) | 2.6% |
| John Cummings | Easington | Lab | (1997-2001) | 0.8% |
| John Cummings | Easington | Lab | (2001-2005) | 2.5% |
| John Cummings | Easington | Lab | (2005-2010) | 3.4% |
| Judith Cummins | Bradford South | Lab | (2015-2017) | 0.0% |
| Judith Cummins | Bradford South | Lab | (2017-2019) | 0.0% |
| Judith Cummins | Bradford South | Lab | (2019-2024) | 0.0% |
| Judith Cummins | Bradford South | Lab | (2024-present) | 0.0% |
| Mr Lawrence Cunliffe | Leigh | Lab | (1997-2001) | 0.3% |
| Alex Cunningham | Stockton North | Lab | (2010-2015) | 0.7% |
| Alex Cunningham | Stockton North | Lab | (2015-2017) | 0.3% |
| Alex Cunningham | Stockton North | Lab | (2017-2019) | 0.0% |
| Alex Cunningham | Stockton North | Lab | (2019-2024) | 0.0% |
| Lord Cunningham of Felling | (Lords) | Lab | (2005-present) | 0.4% |
| Dr Jack Cunningham | Copeland | Lab | (1997-2001) | 0.4% |
| Dr Jack Cunningham | Copeland | Lab | (2001-2005) | 0.8% |
| Jim Cunningham | Coventry South | Lab | (1997-2001) | 0.4% |
| Jim Cunningham | Coventry South | Lab | (2001-2005) | 1.4% |
| Jim Cunningham | Coventry South | Lab | (2005-2010) | 1.3% |
| Jim Cunningham | Coventry South | Lab | (2010-2015) | 1.5% |
| Jim Cunningham | Coventry South | Lab | (2015-2017) | 0.5% |
| Jim Cunningham | Coventry South | Lab | (2017-2019) | 1.3% |
| Roseanna Cunningham | Perth | SNP | (1997-2001) | 2.8% |
| Tony Cunningham | Workington | Lab | (2001-2005) | 1.2% |
| Tony Cunningham | Workington | Lab | (2005-2010) | 1.6% |
| Tony Cunningham | Workington | Lab | (2010-2015) | 0.8% |
| Margaret Curran | Glasgow East | Lab | (2010-2015) | 0.1% |
| Lord Currie of Marylebone | (Lords) | Crossbench | (1996-present) | 46.4% |
| David Curry | Skipton and Ripon | Con | (1997-2001) | 1.3% |
| David Curry | Skipton and Ripon | Con | (2001-2005) | 3.9% |
| David Curry | Skipton and Ripon | Con | (2005-2010) | 4.9% |
| Lord Curry of Kirkharle | (Lords) | Crossbench | (2011-present) | 38.5% |
| Claire Curtis-Thomas | Crosby | Lab | (1997-2001) | 0.6% |
| Claire Curtis-Thomas | Crosby | Lab | (2001-2005) | 1.2% |
| Claire Curtis-Thomas | Crosby | Lab | (2005-2010) | 2.1% |
| Chris Curtis | Milton Keynes North | Lab | (2024-present) | 0.0% |
| Baroness D'Souza | (Lords) | Crossbench | (2004-2011) | 19.2% |
| Baroness D'Souza | (Lords) | Crossbench | (2016-present) | 10.7% |
| Baroness D'Souza | (Lords) | Non-affiliated | (2011-2016) | n/a |
| Janet Daby | Lewisham East | Lab | (2018-2019) | 0.5% |
| Janet Daby | Lewisham East | Lab | (2019-2024) | 0.0% |
| Janet Daby | Lewisham East | Lab | (2024-present) | 0.0% |
| Lord Dacre of Glanton | (Lords) | Con | (1979-2003) | 2.6% |
| Mr Cynog Dafis | Ceredigion | PC | (1997-2000) | 0.5% |
| Lord Dahrendorf | (Lords) | Crossbench | (2004-2009) | 24.1% |
| Lord Dahrendorf | (Lords) | LDem | (1993-2004) | 8.3% |
| Mr Paul Daisley | Brent East | Lab | (2001-2003) | 0.0% |
| Nicholas Dakin | Scunthorpe | Lab | (2010-2015) | 0.7% |
| Nicholas Dakin | Scunthorpe | Lab | (2015-2017) | 0.0% |
| Nicholas Dakin | Scunthorpe | Lab | (2017-2019) | 0.0% |
| Nicholas Dakin | Scunthorpe | Lab | (2024-present) | 0.0% |
| Ashley Dalton | West Lancashire | Lab | (2023-2024) | 0.0% |
| Ashley Dalton | West Lancashire | Lab | (2024-present) | 2.2% |
| Mr Tam Dalyell | Linlithgow | Lab | (1997-2001) | 6.0% |
| Mr Tam Dalyell | Linlithgow | Lab | (2001-2005) | 10.1% |
| James Daly | Bury North | Con | (2019-2024) | 0.7% |
| Adam Dance | Yeovil | LDem | (2024-present) | 0.0% |
| Simon Danczuk | Rochdale | Lab | (2010-2015) | 0.4% |
| Simon Danczuk | Rochdale | Lab | (2015-2017) | 1.4% |
| Daniel Johnson | Edinburgh Southern | Lab | (2016-2021) | n/a |
| Daniel Johnson | Edinburgh Southern | Lab | (2021-present) | n/a |
| Lord Dannatt | (Lords) | Crossbench | (2011-present) | 51.1% |
| Baroness Darcy de Knayth | (Lords) | Crossbench | (1943-2008) | 16.4% |
| Alistair Darling | Edinburgh Central | Lab | (2001-2005) | 0.3% |
| Alistair Darling | Edinburgh Central | Lab | (1997-2001) | 0.1% |
| Alistair Darling | Edinburgh South West | Lab | (2005-2010) | 0.7% |
| Alistair Darling | Edinburgh South West | Lab | (2010-2015) | 0.0% |
| Lord Darling of Roulanish | (Lords) | Lab | (2015-2020) | 0.0% |
| Steve Darling | Torbay | LDem | (2024-present) | 1.6% |
| Emily Darlington | Milton Keynes Central | Lab | (2024-present) | 0.0% |
| Lord Darroch of Kew | (Lords) | Crossbench | (2019-present) | n/a |
| Mr Keith Darvill | Upminster | Lab | (1997-2001) | 0.4% |
| Lord Darzi of Denham | (Lords) | Lab | (2007-2019) | 0.8% |
| Lord Darzi of Denham | (Lords) | Non-affiliated | (2019-present) | n/a |
| Dave Petrie | Highlands and Islands | Con | (2006-2007) | 0.7% |
| Dave Thompson | Highlands and Islands | SNP | (2007-2011) | 0.0% |
| Dave Thompson | Skye, Lochaber and Badenoch | SNP | (2011-2016) | n/a |
| Edward Davey | Kingston and Surbiton | LDem | (1997-2001) | 1.1% |
| Edward Davey | Kingston and Surbiton | LDem | (2001-2005) | 1.6% |
| Edward Davey | Kingston and Surbiton | LDem | (2005-2010) | 1.2% |
| Edward Davey | Kingston and Surbiton | LDem | (2010-2015) | 0.6% |
| Edward Davey | Kingston and Surbiton | LDem | (2017-2019) | 0.3% |
| Edward Davey | Kingston and Surbiton | LDem | (2019-2024) | 0.0% |
| Edward Davey | Kingston and Surbiton | LDem | (2024-present) | 2.2% |
| Mrs Valerie Davey | Bristol West | Lab | (1997-2001) | 0.4% |
| Mrs Valerie Davey | Bristol West | Lab | (2001-2005) | 1.8% |
| Baroness David | (Lords) | Lab | (1978-2009) | 1.5% |
| David McLetchie | Edinburgh Pentlands | Con | (2003-2007) | 0.6% |
| David McLetchie | Edinburgh Pentlands | Con | (2007-2011) | 0.0% |
| David Stewart | Highlands and Islands | Lab | (2011-2016) | n/a |
| David Stewart | Highlands and Islands | Lab | (2007-2011) | 0.0% |
| David Stewart | Highlands and Islands | Lab | (2016-2021) | n/a |
| David Torrance | Kirkcaldy | SNP | (2011-2016) | n/a |
| David Torrance | Kirkcaldy | SNP | (2016-2021) | n/a |
| David Torrance | Kirkcaldy | SNP | (2021-present) | n/a |
| David McLetchie | Lothian | Con | (2011-2013) | n/a |
| David McLetchie | Lothians | Con | (1999-2003) | 0.8% |
| Lord David [Missing last name for 80242] | Lothians | None | (1999-1999) | n/a |
| Lord David [Missing last name for 80277] | Lothians | None | (1999-2003) | n/a |
| David Davidson | North East Scotland | Con | (2003-2007) | 0.8% |
| David Davidson | North East Scotland | Con | (1999-2003) | 0.4% |
| David Mundell | South of Scotland | Con | (2003-2005) | 1.4% |
| David Mundell | South of Scotland | Con | (1999-2003) | 0.9% |
| David Whitton | Strathkelvin and Bearsden | Lab | (2007-2011) | 0.7% |
| Lord Davidson of Glen Clova | (Lords) | Lab | (2006-present) | 0.7% |
| Ian Davidson | Glasgow Pollok | Lab | (1997-2001) | 3.1% |
| Ian Davidson | Glasgow Pollok | Lab | (2001-2005) | 4.2% |
| Ian Davidson | Glasgow South West | Lab | (2005-2010) | 4.7% |
| Ian Davidson | Glasgow South West | Lab | (2010-2015) | 1.2% |
| Baroness Davidson of Lundin Links | (Lords) | Con | (2021-present) | 4.3% |
| Wayne David | Caerphilly | Lab | (2001-2005) | 1.3% |
| Wayne David | Caerphilly | Lab | (2005-2010) | 0.3% |
| Wayne David | Caerphilly | Lab | (2010-2015) | 0.2% |
| Wayne David | Caerphilly | Lab | (2015-2017) | 0.9% |
| Wayne David | Caerphilly | Lab | (2017-2019) | 0.0% |
| Wayne David | Caerphilly | Lab | (2019-2024) | 0.0% |
| Alex Davies-Jones | Pontypridd | Lab | (2019-2024) | 0.0% |
| Alex Davies-Jones | Pontypridd | Lab | (2024-present) | 0.0% |
| Lord Davies of Abersoch | (Lords) | Lab | (2009-2016) | 0.0% |
| Lord Davies of Abersoch | (Lords) | Non-affiliated | (2016-present) | 0.0% |
| Ann Davies | Caerfyrddin | PC | (2024-present) | 0.9% |
| Lord Davies of Brixton | (Lords) | Lab | (2020-present) | 0.4% |
| Byron Davies | Gower | Con | (2015-2017) | 0.0% |
| Chris Davies | Brecon and Radnorshire | Con | (2015-2017) | 0.3% |
| Chris Davies | Brecon and Radnorshire | Con | (2017-2019) | 2.0% |
| Lord Davies of Coity | (Lords) | Lab | (1997-2019) | 2.5% |
| Dai Davies | Blaenau Gwent | Independent | (2006-2010) | n/a |
| David Davies | Monmouth | Con | (2005-2010) | 1.8% |
| David Davies | Monmouth | Con | (2010-2015) | 1.3% |
| David Davies | Monmouth | Con | (2015-2017) | 0.0% |
| David Davies | Monmouth | Con | (2017-2019) | 1.0% |
| David Davies | Monmouth | Con | (2019-2024) | 0.1% |
| Mr Denzil Davies | Llanelli | Lab | (1997-2001) | 4.2% |
| Mr Denzil Davies | Llanelli | Lab | (2001-2005) | 10.0% |
| Gareth Davies | Grantham and Bourne | Con | (2024-present) | 0.0% |
| Gareth Davies | Grantham and Stamford | Con | (2019-2024) | 0.2% |
| Geraint Davies | Croydon Central | Lab | (1997-2001) | 0.2% |
| Geraint Davies | Croydon Central | Lab | (2001-2005) | 0.8% |
| Geraint Davies | Swansea West | whilst Independent | (2023-2024) | n/a |
| Geraint Davies | Swansea West | Lab | (2010-2015) | 0.4% |
| Geraint Davies | Swansea West | Lab | (2015-2017) | 2.1% |
| Geraint Davies | Swansea West | Lab | (2017-2019) | 0.9% |
| Geraint Davies | Swansea West | whilst Lab | (2019-2023) | 0.0% |
| Glyn Davies | Montgomeryshire | Con | (2010-2015) | 1.3% |
| Glyn Davies | Montgomeryshire | Con | (2015-2017) | 0.0% |
| Glyn Davies | Montgomeryshire | Con | (2017-2019) | 0.5% |
| Lord Davies of Gower | (Lords) | Con | (2019-present) | 0.9% |
| James Davies | Vale of Clwyd | Con | (2015-2017) | 0.3% |
| James Davies | Vale of Clwyd | Con | (2019-2024) | 0.3% |
| Jonathan Davies | Mid Derbyshire | Lab | (2024-present) | 1.7% |
| Mims Davies | East Grinstead and Uckfield | Con | (2024-present) | 0.7% |
| Mims Davies | Eastleigh | Con | (2015-2017) | 0.0% |
| Mims Davies | Eastleigh | Con | (2017-2019) | 1.2% |
| Mims Davies | Mid Sussex | Con | (2019-2024) | 0.1% |
| Lord Davies of Oldham | (Lords) | Lab | (1997-2024) | 0.7% |
| Paul Davies | Colne Valley | Lab | (2024-present) | 0.0% |
| Philip Davies | Shipley | Con | (2005-2010) | 4.3% |
| Philip Davies | Shipley | Con | (2010-2015) | 19.6% |
| Philip Davies | Shipley | Con | (2015-2017) | 10.6% |
| Philip Davies | Shipley | Con | (2017-2019) | 6.6% |
| Philip Davies | Shipley | Con | (2019-2024) | 7.8% |
| Quentin Davies | Grantham and Stamford | Con | (1997-2001) | 0.9% |
| Quentin Davies | Grantham and Stamford | Con | (2001-2005) | 0.8% |
| Quentin Davies | Grantham and Stamford | whilst Con | (2005-2007) | 2.5% |
| Quentin Davies | Grantham and Stamford | whilst Lab | (2007-2010) | 1.0% |
| Mr Ron Davies | Caerphilly | Lab | (1997-2001) | 0.8% |
| Shaun Davies | Telford | Lab | (2024-present) | 1.7% |
| Lord Davies of Stamford | (Lords) | Lab | (2010-2023) | 1.3% |
| David Davis | Goole and Pocklington | Con | (2024-present) | 3.8% |
| David Davis | Haltemprice and Howden | Con | (1997-2001) | 0.6% |
| David Davis | Haltemprice and Howden | Con | (2001-2005) | 0.4% |
| David Davis | Haltemprice and Howden | Con | (2005-2008) | 1.0% |
| David Davis | Haltemprice and Howden | Con | (2008-2010) | 2.5% |
| David Davis | Haltemprice and Howden | Con | (2010-2015) | 11.8% |
| David Davis | Haltemprice and Howden | Con | (2015-2017) | 2.5% |
| David Davis | Haltemprice and Howden | Con | (2017-2019) | 3.6% |
| David Davis | Haltemprice and Howden | Con | (2019-2024) | 9.2% |
| Dehenna Davison | Bishop Auckland | Con | (2019-2024) | 1.2% |
| Mr Terry Davis | Birmingham, Hodge Hill | Lab | (1997-2001) | 1.6% |
| Mr Terry Davis | Birmingham, Hodge Hill | Lab | (2001-2004) | 3.9% |
| Mr Hilton Dawson | Lancaster and Wyre | Lab | (1997-2001) | 1.8% |
| Mr Hilton Dawson | Lancaster and Wyre | Lab | (2001-2005) | 4.0% |
| Martyn Day | Linlithgow and East Falkirk | SNP | (2015-2017) | 0.0% |
| Martyn Day | Linlithgow and East Falkirk | SNP | (2017-2019) | 0.0% |
| Martyn Day | Linlithgow and East Falkirk | SNP | (2019-2024) | 0.0% |
| Mr Stephen Day | Cheadle | Con | (1997-2001) | 1.1% |
| Nick de Bois | Enfield North | Con | (2010-2015) | 3.4% |
| Lord de Clifford | (Lords) | Crossbench | (2023-present) | 19.5% |
| Marsha de Cordova | Battersea | Lab | (2017-2019) | 0.8% |
| Marsha de Cordova | Battersea | Lab | (2019-2024) | 0.0% |
| Marsha de Cordova | Battersea | Lab | (2024-present) | 2.8% |
| Lord de Mauley | (Lords) | Con | (2005-present) | 0.5% |
| Gloria De Piero | Ashfield | Lab | (2010-2015) | 0.0% |
| Gloria De Piero | Ashfield | Lab | (2015-2017) | 0.7% |
| Gloria De Piero | Ashfield | Lab | (2017-2019) | 0.3% |
| Dean Lockhart | Mid Scotland and Fife | Con | (2016-2021) | n/a |
| Dean Lockhart | Mid Scotland and Fife | Con | (2021-2022) | n/a |
| Bobby Dean | Carshalton and Wallington | LDem | (2024-present) | 1.6% |
| Lord Dean of Harptree | (Lords) | Con | (1993-2009) | 0.8% |
| Janet Dean | Burton | Lab | (1997-2001) | 0.4% |
| Janet Dean | Burton | Lab | (2001-2005) | 0.9% |
| Janet Dean | Burton | Lab | (2005-2010) | 0.9% |
| Josh Dean | Hertford and Stortford | Lab | (2024-present) | 0.0% |
| Baroness Dean of Thornton-le-Fylde | (Lords) | Lab | (1993-2018) | 0.6% |
| Lord Dear | (Lords) | Crossbench | (2006-present) | 30.9% |
| Kate Dearden | Halifax | Lab | (2024-present) | 0.0% |
| Lord Dearing | (Lords) | Crossbench | (1999-2002) | n/a |
| Lord Dearing | (Lords) | Crossbench | (2004-2009) | n/a |
| Lord Dearing | (Lords) | Other | (1998-1999) | n/a |
| Lord Dearing | (Lords) | Other | (2002-2004) | n/a |
| Thangam Debbonaire | Bristol West | Lab | (2015-2017) | 3.1% |
| Thangam Debbonaire | Bristol West | Lab | (2017-2019) | 0.3% |
| Thangam Debbonaire | Bristol West | Lab | (2019-2024) | 0.0% |
| Lord Deben | (Lords) | Con | (2010-present) | 18.3% |
| Baroness Deech | (Lords) | Crossbench | (2005-present) | 43.0% |
| Lord Deedes | (Lords) | Con | (1986-2007) | 1.1% |
| Lord Deighton | (Lords) | Con | (2012-present) | 0.4% |
| Baroness Delacourt-Smith of Alteryn | (Lords) | Lab | (1974-2010) | n/a |
| Lord Denham | (Lords) | Con | (1948-2021) | 1.9% |
| John Denham | Southampton, Itchen | Lab | (1997-2001) | 0.4% |
| John Denham | Southampton, Itchen | Lab | (2001-2005) | 0.7% |
| John Denham | Southampton, Itchen | Lab | (2005-2010) | 0.7% |
| John Denham | Southampton, Itchen | Lab | (2010-2015) | 0.6% |
| Dennis Robertson | Aberdeenshire West | SNP | (2011-2016) | n/a |
| Dennis Canavan | Falkirk West | Independent | (2003-2007) | n/a |
| Dennis Canavan | Falkirk West | Independent | (1999-2003) | n/a |
| Emma Dent Coad | Kensington | Lab | (2017-2019) | 0.6% |
| Baroness Denton of Wakefield | (Lords) | Con | (1991-2001) | 0.0% |
| Carla Denyer | Bristol Central | Green | (2024-present) | 0.0% |
| The Bishop of Derby | (Lords) | Bishop | (1999-2005) | 0.0% |
| The Bishop of Derby | (Lords) | Bishop | (2010-2018) | 0.0% |
| The Bishop of Derby | (Lords) | Bishop | (2019-present) | 0.0% |
| Derek Mackay | Renfrewshire North and West | whilst Independent | (2020-2021) | n/a |
| Derek Mackay | Renfrewshire North and West | SNP | (2011-2016) | n/a |
| Derek Mackay | Renfrewshire North and West | whilst SNP | (2016-2020) | n/a |
| Derek Brownlee | South of Scotland | Con | (2005-2007) | 1.3% |
| Derek Brownlee | South of Scotland | Con | (2007-2011) | 0.2% |
| Des McNulty | Clydebank and Milngavie | Lab | (2003-2007) | 0.4% |
| Des McNulty | Clydebank and Milngavie | Lab | (1999-2003) | 0.4% |
| Des McNulty | Clydebank and Milngavie | Lab | (2007-2011) | 0.0% |
| Lord Desai | (Lords) | Lab | (1991-2020) | 2.3% |
| Lord Desai | (Lords) | Non-affiliated | (2020-present) | 11.8% |
| Jim Devine | Livingston | Lab | (2005-2010) | 1.5% |
| The Earl of Devon | (Lords) | Crossbench | (2018-present) | 31.0% |
| Donald Dewar | Glasgow Anniesland | Lab | (1997-2000) | 0.0% |
| Charlie Dewhirst | Bridlington and The Wolds | Con | (2024-present) | 0.0% |
| Parmjit Dhanda | Gloucester | Lab | (2001-2005) | 0.5% |
| Parmjit Dhanda | Gloucester | Lab | (2005-2010) | 0.6% |
| Tan Dhesi | Slough | Lab | (2017-2019) | 0.5% |
| Tan Dhesi | Slough | Lab | (2019-2024) | 0.0% |
| Tan Dhesi | Slough | Lab | (2024-present) | 1.7% |
| Lord Dholakia | (Lords) | LDem | (1997-present) | 0.9% |
| Lord Diamond | (Lords) | Lab | (1970-2004) | 0.0% |
| Jim Dickson | Dartford | Lab | (2024-present) | 0.0% |
| Lee Dillon | Newbury | LDem | (2024-present) | 0.0% |
| Caroline Dinenage | Gosport | Con | (2010-2015) | 1.1% |
| Caroline Dinenage | Gosport | Con | (2015-2017) | 0.0% |
| Caroline Dinenage | Gosport | Con | (2017-2019) | 0.9% |
| Caroline Dinenage | Gosport | Con | (2019-2024) | 0.2% |
| Caroline Dinenage | Gosport | Con | (2024-present) | 3.3% |
| Sarah Dines | Derbyshire Dales | Con | (2019-2024) | 0.9% |
| Andrew Dismore | Hendon | Lab | (1997-2001) | 2.3% |
| Andrew Dismore | Hendon | Lab | (2001-2005) | 4.0% |
| Andrew Dismore | Hendon | Lab | (2005-2010) | 4.0% |
| Lord Dixon | (Lords) | Lab | (1997-2016) | 4.2% |
| Lord Dixon-Smith | (Lords) | Con | (1993-2023) | 0.9% |
| Anna Dixon | Shipley | Lab | (2024-present) | 1.6% |
| Samantha Dixon | Chester North and Neston | Lab | (2024-present) | 0.0% |
| Samantha Dixon | City of Chester | Lab | (2022-2024) | 0.0% |
| Jonathan Djanogly | Huntingdon | Con | (2001-2005) | 1.2% |
| Jonathan Djanogly | Huntingdon | Con | (2005-2010) | 1.6% |
| Jonathan Djanogly | Huntingdon | Con | (2010-2015) | 0.4% |
| Jonathan Djanogly | Huntingdon | Con | (2015-2017) | 0.0% |
| Jonathan Djanogly | Huntingdon | Con | (2017-2019) | 9.7% |
| Jonathan Djanogly | Huntingdon | Con | (2019-2024) | 2.0% |
| Jim Dobbin | Heywood and Middleton | Lab | (1997-2001) | 2.0% |
| Jim Dobbin | Heywood and Middleton | Lab | (2001-2005) | 4.6% |
| Jim Dobbin | Heywood and Middleton | Lab | (2005-2010) | 2.0% |
| Jim Dobbin | Heywood and Middleton | Lab | (2010-2014) | 3.7% |
| Lord Dobbs | (Lords) | Con | (2010-present) | 1.3% |
| Frank Dobson | Holborn and St Pancras | Lab | (1997-2001) | 0.0% |
| Frank Dobson | Holborn and St Pancras | Lab | (2001-2005) | 3.7% |
| Frank Dobson | Holborn and St Pancras | Lab | (2005-2010) | 4.0% |
| Frank Dobson | Holborn and St Pancras | Lab | (2010-2015) | 0.9% |
| Leo Docherty | Aldershot | Con | (2017-2019) | 0.0% |
| Leo Docherty | Aldershot | Con | (2019-2024) | 0.0% |
| Martin Docherty | West Dunbartonshire | SNP | (2015-2017) | 0.0% |
| Martin Docherty | West Dunbartonshire | SNP | (2017-2019) | 0.0% |
| Martin Docherty | West Dunbartonshire | SNP | (2019-2024) | 0.0% |
| Thomas Docherty | Dunfermline and West Fife | Lab | (2010-2015) | 1.4% |
| Anneliese Dodds | Oxford East | Lab | (2017-2019) | 0.5% |
| Anneliese Dodds | Oxford East | Lab | (2019-2024) | 0.0% |
| Anneliese Dodds | Oxford East | Lab | (2024-present) | 2.1% |
| Lord Dodds of Duncairn | (Lords) | DUP | (2020-present) | 5.1% |
| Jane Dodds | Brecon and Radnorshire | LDem | (2019-2019) | 0.0% |
| Nigel Dodds | Belfast North | DUP | (2001-2005) | 0.0% |
| Nigel Dodds | Belfast North | DUP | (2005-2010) | 0.9% |
| Nigel Dodds | Belfast North | DUP | (2010-2015) | 0.5% |
| Nigel Dodds | Belfast North | DUP | (2015-2017) | 0.4% |
| Nigel Dodds | Belfast North | DUP | (2017-2019) | 0.8% |
| Pat Doherty | West Tyrone | SF | (2001-2005) | n/a |
| Pat Doherty | West Tyrone | SF | (2005-2010) | n/a |
| Pat Doherty | West Tyrone | SF | (2010-2015) | n/a |
| Pat Doherty | West Tyrone | SF | (2015-2017) | n/a |
| Helena Dollimore | Hastings and Rye | Lab | (2024-present) | 0.6% |
| Baroness Donaghy | (Lords) | Lab | (2010-present) | 0.2% |
| Donald Gorrie | Central Scotland | LDem | (2003-2007) | 8.2% |
| Donald Gorrie | Central Scotland | LDem | (1999-2003) | 8.4% |
| Donald Dewar | Glasgow Anniesland | Lab | (1999-2000) | 1.5% |
| Donald Cameron | Highlands and Islands | Con | (2016-2021) | n/a |
| Donald Cameron | Highlands and Islands | Con | (2021-2024) | n/a |
| Jeffrey M. Donaldson | Lagan Valley | whilst DUP | (2004-2005) | 0.0% |
| Jeffrey M. Donaldson | Lagan Valley | DUP | (2005-2010) | 0.5% |
| Jeffrey M. Donaldson | Lagan Valley | DUP | (2010-2015) | 2.2% |
| Jeffrey M. Donaldson | Lagan Valley | DUP | (2015-2017) | 1.3% |
| Jeffrey M. Donaldson | Lagan Valley | DUP | (2017-2019) | 0.3% |
| Jeffrey M. Donaldson | Lagan Valley | DUP | (2019-2024) | 0.8% |
| Jeffrey M. Donaldson | Lagan Valley | whilst Independent Ulster Unionist | (2003-2004) | n/a |
| Jeffrey M. Donaldson | Lagan Valley | UUP | (1997-2001) | 0.6% |
| Jeffrey M. Donaldson | Lagan Valley | whilst UUP | (2001-2003) | 0.5% |
| Lord Donaldson of Lymington | (Lords) | Crossbench | (1988-2005) | 19.1% |
| Stuart Donaldson | West Aberdeenshire and Kincardine | SNP | (2015-2017) | 0.0% |
| Michelle Donelan | Chippenham | Con | (2015-2017) | 0.0% |
| Michelle Donelan | Chippenham | Con | (2017-2019) | 1.1% |
| Michelle Donelan | Chippenham | Con | (2019-2024) | 0.3% |
| Brian H Donohoe | Central Ayrshire | Lab | (2005-2010) | 0.7% |
| Brian H Donohoe | Central Ayrshire | Lab | (2010-2015) | 1.3% |
| Brian H Donohoe | Cunninghame South | Lab | (1997-2001) | 0.9% |
| Brian H Donohoe | Cunninghame South | Lab | (2001-2005) | 2.2% |
| Lord Donoughue | (Lords) | Lab | (1985-present) | 4.5% |
| Baroness Doocey | (Lords) | LDem | (2010-present) | 3.2% |
| Dave Doogan | Angus | SNP | (2019-2024) | 0.0% |
| Dave Doogan | Angus and Perthshire Glens | SNP | (2024-present) | 1.2% |
| Frank Doran | Aberdeen Central | Lab | (1997-2001) | 0.0% |
| Frank Doran | Aberdeen Central | Lab | (2001-2005) | 1.2% |
| Frank Doran | Aberdeen North | Lab | (2005-2010) | 0.5% |
| Frank Doran | Aberdeen North | Lab | (2010-2015) | 0.1% |
| Allan Dorans | Ayr, Carrick and Cumnock | SNP | (2019-2024) | 0.0% |
| Lord Dormand of Easington | (Lords) | Lab | (1987-2003) | 1.6% |
| Dorothy-Grace Elder | Glasgow | whilst Independent | (1999-2002) | n/a |
| Dorothy-Grace Elder | Glasgow | whilst Independent | (2002-2003) | n/a |
| Stephen Dorrell | Charnwood | Con | (1997-2001) | 0.3% |
| Stephen Dorrell | Charnwood | Con | (2001-2005) | 2.7% |
| Stephen Dorrell | Charnwood | Con | (2005-2010) | 3.2% |
| Stephen Dorrell | Charnwood | Con | (2010-2015) | 0.3% |
| Nadine Dorries | Mid Bedfordshire | Con | (2005-2010) | 0.7% |
| Nadine Dorries | Mid Bedfordshire | Con | (2010-2015) | 4.4% |
| Nadine Dorries | Mid Bedfordshire | Con | (2015-2017) | 1.8% |
| Nadine Dorries | Mid Bedfordshire | Con | (2017-2019) | 1.2% |
| Nadine Dorries | Mid Bedfordshire | Con | (2019-2023) | 0.0% |
| Steve Double | St Austell and Newquay | Con | (2015-2017) | 0.7% |
| Steve Double | St Austell and Newquay | Con | (2017-2019) | 2.8% |
| Steve Double | St Austell and Newquay | Con | (2019-2024) | 0.3% |
| Stephen Doughty | Cardiff South and Penarth | Lab | (2012-2015) | 0.0% |
| Stephen Doughty | Cardiff South and Penarth | Lab | (2015-2017) | 1.4% |
| Stephen Doughty | Cardiff South and Penarth | Lab | (2017-2019) | 0.5% |
| Stephen Doughty | Cardiff South and Penarth | Lab | (2019-2024) | 0.0% |
| Stephen Doughty | Cardiff South and Penarth | Lab | (2024-present) | 3.3% |
| Ms Sue Doughty | Guildford | LDem | (2001-2005) | 2.8% |
| Douglas Ross | Highlands and Islands | Con | (2016-2017) | n/a |
| Douglas Ross | Highlands and Islands | Con | (2021-present) | n/a |
| Douglas Lumsden | North East Scotland | Con | (2021-present) | n/a |
| Lord Douglas-Miller | (Lords) | Con | (2023-present) | 0.0% |
| Oliver Dowden | Hertsmere | Con | (2015-2017) | 0.0% |
| Oliver Dowden | Hertsmere | Con | (2017-2019) | 0.7% |
| Oliver Dowden | Hertsmere | Con | (2019-2024) | 0.0% |
| Oliver Dowden | Hertsmere | Con | (2024-present) | 2.4% |
| Jim Dowd | Lewisham West | Lab | (1997-2001) | 0.2% |
| Jim Dowd | Lewisham West | Lab | (2001-2005) | 1.0% |
| Jim Dowd | Lewisham West | Lab | (2005-2010) | 1.5% |
| Jim Dowd | Lewisham West and Penge | Lab | (2010-2015) | 0.9% |
| Jim Dowd | Lewisham West and Penge | Lab | (2015-2017) | 3.1% |
| Peter Dowd | Bootle | Lab | (2015-2017) | 0.0% |
| Peter Dowd | Bootle | Lab | (2017-2019) | 0.5% |
| Peter Dowd | Bootle | Lab | (2019-2024) | 0.0% |
| Peter Dowd | Bootle | Lab | (2024-present) | 0.0% |
| Graeme Downie | Dunfermline and Dollar | Lab | (2024-present) | 0.0% |
| Jackie Doyle-Price | Thurrock | Con | (2010-2015) | 1.1% |
| Jackie Doyle-Price | Thurrock | Con | (2015-2017) | 0.5% |
| Jackie Doyle-Price | Thurrock | Con | (2017-2019) | 0.7% |
| Jackie Doyle-Price | Thurrock | Con | (2019-2024) | 2.3% |
| Gemma Doyle | West Dunbartonshire | Lab | (2010-2015) | 0.2% |
| Baroness Drake | (Lords) | Lab | (2010-present) | 0.3% |
| Richard Drax | South Dorset | Con | (2010-2015) | 5.6% |
| Richard Drax | South Dorset | Con | (2015-2017) | 0.5% |
| Richard Drax | South Dorset | Con | (2017-2019) | 2.8% |
| Richard Drax | South Dorset | Con | (2019-2024) | 3.3% |
| Lord Drayson | (Lords) | Lab | (2004-present) | 0.7% |
| Drew Smith | Glasgow | Lab | (2011-2016) | n/a |
| David Drew | Stroud | Lab | (1997-2001) | 0.9% |
| David Drew | Stroud | Lab | (2001-2005) | 5.5% |
| David Drew | Stroud | Lab | (2005-2010) | 16.1% |
| David Drew | Stroud | Lab | (2017-2019) | 0.3% |
| Jack Dromey | Birmingham, Erdington | Lab | (2010-2015) | 0.0% |
| Jack Dromey | Birmingham, Erdington | Lab | (2015-2017) | 0.0% |
| Jack Dromey | Birmingham, Erdington | Lab | (2017-2019) | 0.0% |
| Jack Dromey | Birmingham, Erdington | Lab | (2019-2022) | 0.0% |
| Ms Julia Drown | South Swindon | Lab | (1997-2001) | 1.0% |
| Ms Julia Drown | South Swindon | Lab | (2001-2005) | 2.7% |
| Flick Drummond | Meon Valley | Con | (2019-2024) | 0.5% |
| Flick Drummond | Portsmouth South | Con | (2015-2017) | 0.0% |
| Lord Dubs | (Lords) | Lab | (1994-present) | 1.0% |
| James Duddridge | Rochford and Southend East | Con | (2005-2010) | 1.5% |
| James Duddridge | Rochford and Southend East | Con | (2010-2015) | 1.4% |
| James Duddridge | Rochford and Southend East | Con | (2015-2017) | 0.7% |
| James Duddridge | Rochford and Southend East | Con | (2017-2019) | 3.4% |
| James Duddridge | Rochford and Southend East | Con | (2019-2024) | 1.2% |
| Rosie Duffield | Canterbury | whilst Independent | (2024-present) | n/a |
| Rosie Duffield | Canterbury | Lab | (2017-2019) | 0.5% |
| Rosie Duffield | Canterbury | Lab | (2019-2024) | 0.0% |
| Rosie Duffield | Canterbury | whilst Lab | (2024-2024) | 0.0% |
| Michael Dugher | Barnsley East | Lab | (2010-2015) | 0.0% |
| Michael Dugher | Barnsley East | Lab | (2015-2017) | 0.9% |
| David Duguid | Banff and Buchan | Con | (2017-2019) | 2.3% |
| David Duguid | Banff and Buchan | Con | (2019-2024) | 0.0% |
| Duncan McNeil | Greenock and Inverclyde | Lab | (2011-2016) | n/a |
| Duncan McNeil | Greenock and Inverclyde | Lab | (2003-2007) | 0.8% |
| Duncan McNeil | Greenock and Inverclyde | Lab | (1999-2003) | 1.0% |
| Duncan McNeil | Greenock and Inverclyde | Lab | (2007-2011) | 0.2% |
| Duncan Hamilton | Highlands and Islands | SNP | (1999-2003) | 3.9% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (1997-2001) | 0.0% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (2001-2005) | 0.5% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (2005-2010) | 1.0% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (2010-2015) | 0.4% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (2015-2017) | 0.0% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (2017-2019) | 2.4% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (2019-2024) | 3.4% |
| Iain Duncan Smith | Chingford and Woodford Green | Con | (2024-present) | 0.0% |
| Neil Duncan-Jordan | Poole | Lab | (2024-present) | 1.1% |
| Alan Duncan | Rutland and Melton | Con | (1997-2001) | 0.7% |
| Alan Duncan | Rutland and Melton | Con | (2001-2005) | 0.7% |
| Alan Duncan | Rutland and Melton | Con | (2005-2010) | 0.7% |
| Alan Duncan | Rutland and Melton | Con | (2010-2015) | 1.1% |
| Alan Duncan | Rutland and Melton | Con | (2015-2017) | 0.0% |
| Alan Duncan | Rutland and Melton | Con | (2017-2019) | 1.5% |
| Mr Peter Duncan | Galloway and Upper Nithsdale | Con | (2001-2005) | 2.7% |
| Lord Duncan of Springbank | (Lords) | Con | (2017-present) | 1.9% |
| The Earl of Dundee | (Lords) | Con | (1983-present) | 1.7% |
| Lord Dunlop | (Lords) | Con | (2015-present) | 0.4% |
| Baroness Dunn | (Lords) | Crossbench | (1990-2010) | 0.0% |
| Philip Dunne | Ludlow | Con | (2005-2010) | 2.6% |
| Philip Dunne | Ludlow | Con | (2010-2015) | 0.5% |
| Philip Dunne | Ludlow | Con | (2015-2017) | 0.0% |
| Philip Dunne | Ludlow | Con | (2017-2019) | 0.9% |
| Philip Dunne | Ludlow | Con | (2019-2024) | 0.2% |
| Gwyneth Dunwoody | Crewe and Nantwich | Lab | (1997-2001) | 6.5% |
| Gwyneth Dunwoody | Crewe and Nantwich | Lab | (2001-2005) | 14.9% |
| Gwyneth Dunwoody | Crewe and Nantwich | Lab | (2005-2008) | 11.6% |
| The Bishop of Durham | (Lords) | Bishop | (1994-2003) | 15.4% |
| The Bishop of Durham | (Lords) | Bishop | (2003-2010) | 14.3% |
| The Bishop of Durham | (Lords) | Bishop | (2012-2013) | 7.7% |
| The Bishop of Durham | (Lords) | Bishop | (2014-2024) | 0.0% |
| Mark Durkan | Foyle | SDLP | (2005-2010) | 0.5% |
| Mark Durkan | Foyle | SDLP | (2010-2015) | 0.0% |
| Mark Durkan | Foyle | SDLP | (2015-2017) | 0.0% |
| Lord Dykes | (Lords) | Crossbench | (2016-present) | 16.7% |
| Lord Dykes | (Lords) | LDem | (2004-2015) | 2.8% |
| Lord Dykes | (Lords) | Non-affiliated | (2015-2016) | 14.8% |
| Sarah Dyke | Glastonbury and Somerton | LDem | (2024-present) | 1.0% |
| Sarah Dyke | Somerton and Frome | LDem | (2023-2024) | 0.0% |
| Angela Eagle | Wallasey | Lab | (1997-2001) | 0.1% |
| Angela Eagle | Wallasey | Lab | (2001-2005) | 0.9% |
| Angela Eagle | Wallasey | Lab | (2005-2010) | 0.9% |
| Angela Eagle | Wallasey | Lab | (2010-2015) | 0.3% |
| Angela Eagle | Wallasey | Lab | (2015-2017) | 1.0% |
| Angela Eagle | Wallasey | Lab | (2017-2019) | 0.0% |
| Angela Eagle | Wallasey | Lab | (2019-2024) | 0.0% |
| Angela Eagle | Wallasey | Lab | (2024-present) | 0.0% |
| Maria Eagle | Garston and Halewood | Lab | (2010-2015) | 0.1% |
| Maria Eagle | Garston and Halewood | Lab | (2015-2017) | 1.8% |
| Maria Eagle | Garston and Halewood | Lab | (2017-2019) | 0.0% |
| Maria Eagle | Garston and Halewood | Lab | (2019-2024) | 0.0% |
| Maria Eagle | Liverpool Garston | Lab | (2024-present) | 0.0% |
| Maria Eagle | Liverpool, Garston | Lab | (1997-2001) | 0.2% |
| Maria Eagle | Liverpool, Garston | Lab | (2001-2005) | 0.8% |
| Maria Eagle | Liverpool, Garston | Lab | (2005-2010) | 0.8% |
| Lord Eames | (Lords) | Crossbench | (1995-present) | 27.2% |
| Alex Easton | North Down | Independent | (2024-present) | n/a |
| Colum Eastwood | Foyle | SDLP | (2019-2024) | 0.0% |
| Colum Eastwood | Foyle | SDLP | (2024-present) | 0.0% |
| Mark Eastwood | Dewsbury | Con | (2019-2024) | 0.3% |
| Sorcha Eastwood | Lagan Valley | Alliance | (2024-present) | 0.0% |
| Baroness Eaton | (Lords) | Con | (2010-present) | 1.7% |
| Lord Eatwell | (Lords) | Lab | (1992-2014) | 0.5% |
| Lord Eatwell | (Lords) | Lab | (2020-present) | 0.3% |
| Lord Eatwell | (Lords) | Non-affiliated | (2014-2020) | 3.7% |
| Viscount Eccles | (Lords) | Con | (2005-present) | 1.1% |
| Cat Eccles | Stourbridge | Lab | (2024-present) | 0.9% |
| Baroness Eccles of Moulton | (Lords) | Con | (1990-present) | 0.5% |
| Lord Eden of Winton | (Lords) | Con | (1983-2015) | 1.3% |
| Lord Edmiston | (Lords) | Con | (2011-2015) | 1.8% |
| Edward Mountain | Highlands and Islands | Con | (2016-2021) | n/a |
| Edward Mountain | Highlands and Islands | Con | (2021-present) | n/a |
| Mr Huw Edwards | Monmouth | Lab | (1997-2001) | 0.3% |
| Mr Huw Edwards | Monmouth | Lab | (2001-2005) | 1.2% |
| Jonathan Edwards | Carmarthen East and Dinefwr | whilst Independent | (2020-2024) | n/a |
| Jonathan Edwards | Carmarthen East and Dinefwr | PC | (2010-2015) | 0.2% |
| Jonathan Edwards | Carmarthen East and Dinefwr | PC | (2015-2017) | 0.0% |
| Jonathan Edwards | Carmarthen East and Dinefwr | PC | (2017-2019) | 0.0% |
| Jonathan Edwards | Carmarthen East and Dinefwr | whilst PC | (2019-2020) | 0.0% |
| Lauren Edwards | Rochester and Strood | Lab | (2024-present) | 0.6% |
| Ruth Edwards | Rushcliffe | Con | (2019-2024) | 0.3% |
| Sarah Edwards | Tamworth | Lab | (2023-2024) | 0.0% |
| Sarah Edwards | Tamworth | Lab | (2024-present) | 0.0% |
| The Earl of Effingham | (Lords) | Con | (2022-present) | 0.3% |
| Clive Efford | Eltham | Lab | (1997-2001) | 0.5% |
| Clive Efford | Eltham | Lab | (2001-2005) | 2.9% |
| Clive Efford | Eltham | Lab | (2005-2010) | 1.5% |
| Clive Efford | Eltham | Lab | (2010-2015) | 0.3% |
| Clive Efford | Eltham | Lab | (2015-2017) | 0.3% |
| Clive Efford | Eltham | Lab | (2017-2019) | 0.3% |
| Clive Efford | Eltham | Lab | (2019-2024) | 0.0% |
| Clive Efford | Eltham and Chislehurst | Lab | (2024-present) | 0.0% |
| Damien Egan | Bristol North East | Lab | (2024-present) | 0.0% |
| Damien Egan | Kingswood | Lab | (2024-2024) | 0.0% |
| Elaine Thomson | Aberdeen North | Lab | (1999-2003) | 0.3% |
| Elaine Smith | Central Scotland | Lab | (2016-2021) | n/a |
| Elaine Smith | Coatbridge and Chryston | Lab | (2011-2016) | n/a |
| Elaine Smith | Coatbridge and Chryston | Lab | (2003-2007) | 5.6% |
| Elaine Smith | Coatbridge and Chryston | Lab | (1999-2003) | 3.9% |
| Elaine Smith | Coatbridge and Chryston | Lab | (2007-2011) | 2.1% |
| Elaine Murray | Dumfries | Lab | (2003-2007) | 0.6% |
| Elaine Murray | Dumfries | Lab | (1999-2003) | 1.4% |
| Elaine Murray | Dumfries | Lab | (2007-2011) | 0.3% |
| Elaine Murray | Dumfriesshire | Lab | (2011-2016) | n/a |
| Lord Elder | (Lords) | Lab | (1999-2023) | 0.7% |
| Eleanor Scott | Highlands and Islands | Green | (2003-2007) | 0.7% |
| Elena Whitham | Carrick, Cumnock and Doon Valley | SNP | (2021-present) | n/a |
| Lord Elis-Thomas | (Lords) | Crossbench | (1992-2012) | 31.4% |
| Lord Elis-Thomas | (Lords) | Non-affiliated | (2016-present) | 3.1% |
| Lord Elis-Thomas | (Lords) | PC | (2012-2016) | 0.0% |
| Elizabeth Smith | Mid Scotland and Fife | Con | (2011-2016) | n/a |
| Elizabeth Smith | Mid Scotland and Fife | Con | (2007-2011) | 0.0% |
| Elizabeth Smith | Mid Scotland and Fife | Con | (2016-2021) | n/a |
| Elizabeth Smith | Mid Scotland and Fife | Con | (2021-present) | n/a |
| Baroness Elles | (Lords) | Con | (1972-2009) | 0.7% |
| Lord Elliott of Ballinamallard | (Lords) | UUP | (2024-present) | 0.0% |
| Julie Elliott | Sunderland Central | Lab | (2010-2015) | 0.0% |
| Julie Elliott | Sunderland Central | Lab | (2015-2017) | 0.0% |
| Julie Elliott | Sunderland Central | Lab | (2017-2019) | 0.0% |
| Julie Elliott | Sunderland Central | Lab | (2019-2024) | 0.0% |
| Lord Elliott of Mickle Fell | (Lords) | Con | (2024-present) | 0.0% |
| Lord Elliott of Morpeth | (Lords) | Con | (1985-2011) | 0.8% |
| Tom Elliott | Fermanagh and South Tyrone | UUP | (2015-2017) | 0.0% |
| Maya Ellis | Ribble Valley | Lab | (2024-present) | 2.8% |
| Michael Ellis | Northampton North | Con | (2010-2015) | 0.8% |
| Michael Ellis | Northampton North | Con | (2015-2017) | 0.0% |
| Michael Ellis | Northampton North | Con | (2017-2019) | 0.7% |
| Michael Ellis | Northampton North | Con | (2019-2024) | 0.0% |
| Jane Ellison | Battersea | Con | (2010-2015) | 1.6% |
| Jane Ellison | Battersea | Con | (2015-2017) | 0.0% |
| Louise Ellman | Liverpool, Riverside | Lab | (1997-2001) | 0.3% |
| Louise Ellman | Liverpool, Riverside | Lab | (2001-2005) | 1.4% |
| Louise Ellman | Liverpool, Riverside | Lab | (2005-2010) | 0.8% |
| Louise Ellman | Liverpool, Riverside | Lab | (2010-2015) | 0.0% |
| Louise Ellman | Liverpool, Riverside | Lab | (2015-2017) | 1.5% |
| Louise Ellman | Liverpool, Riverside | Lab | (2017-2019) | 0.5% |
| Tobias Ellwood | Bournemouth East | Con | (2005-2010) | 0.8% |
| Tobias Ellwood | Bournemouth East | Con | (2010-2015) | 0.5% |
| Tobias Ellwood | Bournemouth East | Con | (2015-2017) | 0.0% |
| Tobias Ellwood | Bournemouth East | Con | (2017-2019) | 0.7% |
| Tobias Ellwood | Bournemouth East | Con | (2019-2024) | 1.0% |
| Chris Elmore | Bridgend | Lab | (2024-present) | 0.0% |
| Chris Elmore | Ogmore | Lab | (2016-2017) | 0.0% |
| Chris Elmore | Ogmore | Lab | (2017-2019) | 0.0% |
| Chris Elmore | Ogmore | Lab | (2019-2024) | 0.1% |
| Charlie Elphicke | Dover | Con | (2010-2015) | 1.2% |
| Charlie Elphicke | Dover | Con | (2015-2017) | 0.0% |
| Charlie Elphicke | Dover | whilst Con | (2017-2017) | 0.0% |
| Charlie Elphicke | Dover | whilst Con | (2018-2019) | 8.4% |
| Charlie Elphicke | Dover | whilst Independent | (2017-2018) | n/a |
| Charlie Elphicke | Dover | whilst Independent | (2019-2019) | n/a |
| Natalie Elphicke | Dover | whilst Con | (2019-2024) | 0.4% |
| Natalie Elphicke | Dover | whilst Lab | (2024-2024) | 0.0% |
| Lord Elton | (Lords) | Con | (1973-2020) | 1.7% |
| The Bishop of Ely | (Lords) | Bishop | (2007-2010) | n/a |
| The Bishop of Ely | (Lords) | Bishop | (2014-2023) | 0.0% |
| Lord Elystan-Morgan | (Lords) | Crossbench | (1981-2020) | 35.8% |
| Baroness Emerton | (Lords) | Crossbench | (1997-2019) | 15.0% |
| Sir Peter Emery | East Devon | Con | (1997-2001) | 1.7% |
| Emma Roddick | Highlands and Islands | SNP | (2021-present) | n/a |
| Emma Harper | South Scotland | SNP | (2016-2021) | n/a |
| Emma Harper | South Scotland | SNP | (2021-present) | n/a |
| Lord Empey | (Lords) | UUP | (2011-present) | 0.0% |
| Lord Emslie | (Lords) | Crossbench | (1980-2002) | n/a |
| Natascha Engel | North East Derbyshire | Lab | (2005-2010) | 0.9% |
| Natascha Engel | North East Derbyshire | Lab | (2010-2015) | 2.2% |
| Natascha Engel | North East Derbyshire | Lab | (2015-2017) | n/a |
| Jeff Ennis | Barnsley East and Mexborough | Lab | (1997-2001) | 0.2% |
| Jeff Ennis | Barnsley East and Mexborough | Lab | (2001-2005) | 0.8% |
| Jeff Ennis | Barnsley East and Mexborough | Lab | (2005-2010) | 0.7% |
| Kirith Entwistle | Bolton North East | Lab | (2024-present) | 0.6% |
| The Earl of Erroll | (Lords) | Crossbench | (1978-present) | 34.9% |
| Lord Erroll of Hale | (Lords) | Con | (1965-2000) | n/a |
| Florence Eshalomi | Vauxhall | Lab | (2019-2024) | 0.0% |
| Florence Eshalomi | Vauxhall and Camberwell Green | Lab | (2024-present) | 1.8% |
| Bill Esterson | Sefton Central | Lab | (2010-2015) | 0.5% |
| Bill Esterson | Sefton Central | Lab | (2015-2017) | 0.3% |
| Bill Esterson | Sefton Central | Lab | (2017-2019) | 0.0% |
| Bill Esterson | Sefton Central | Lab | (2019-2024) | 0.0% |
| Bill Esterson | Sefton Central | Lab | (2024-present) | 0.0% |
| Bill Etherington | Sunderland North | Lab | (1997-2001) | 2.8% |
| Bill Etherington | Sunderland North | Lab | (2001-2005) | 5.2% |
| Bill Etherington | Sunderland North | Lab | (2005-2010) | 3.3% |
| Lord Etherton | (Lords) | Crossbench | (2020-present) | 7.7% |
| Euan Robson | Roxburgh and Berwickshire | LDem | (2003-2007) | 0.4% |
| Euan Robson | Roxburgh and Berwickshire | LDem | (1999-2003) | 1.8% |
| George Eustice | Camborne and Redruth | Con | (2010-2015) | 1.2% |
| George Eustice | Camborne and Redruth | Con | (2015-2017) | 0.0% |
| George Eustice | Camborne and Redruth | Con | (2017-2019) | 1.9% |
| George Eustice | Camborne and Redruth | Con | (2019-2024) | 0.4% |
| Baroness Evans of Bowes Park | (Lords) | Con | (2014-present) | 0.2% |
| Chris Evans | Caerphilly | Lab | (2024-present) | 2.0% |
| Chris Evans | Islwyn | Lab | (2010-2015) | 0.2% |
| Chris Evans | Islwyn | Lab | (2015-2017) | 0.9% |
| Chris Evans | Islwyn | Lab | (2017-2019) | 0.3% |
| Chris Evans | Islwyn | Lab | (2019-2024) | 0.0% |
| Graham Evans | Weaver Vale | Con | (2010-2015) | 0.9% |
| Graham Evans | Weaver Vale | Con | (2015-2017) | 0.0% |
| Jonathan Evans | Cardiff North | Con | (2010-2015) | 1.5% |
| Luke Evans | Bosworth | Con | (2019-2024) | 0.1% |
| Luke Evans | Hinckley and Bosworth | Con | (2024-present) | 1.4% |
| Nigel Evans | Ribble Valley | Con | (1997-2001) | 0.4% |
| Nigel Evans | Ribble Valley | Con | (2001-2005) | 1.1% |
| Nigel Evans | Ribble Valley | Con | (2005-2010) | 2.2% |
| Nigel Evans | Ribble Valley | Con | (2010-2015) | 3.0% |
| Nigel Evans | Ribble Valley | Con | (2015-2017) | 0.0% |
| Nigel Evans | Ribble Valley | Con | (2017-2019) | 2.0% |
| Nigel Evans | Ribble Valley | Con | (2019-2024) | 0.0% |
| Lord Evans of Parkside | (Lords) | Lab | (1997-2015) | 2.4% |
| Lord Evans of Rainow | (Lords) | Con | (2022-present) | 0.6% |
| Lord Evans of Temple Guiting | (Lords) | Lab | (2000-2016) | 1.1% |
| Lord Evans of Watford | (Lords) | Lab | (1998-present) | 0.3% |
| Lord Evans of Weardale | (Lords) | Crossbench | (2014-present) | 35.7% |
| Evelyn Tweed | Stirling | SNP | (2021-present) | n/a |
| David Evennett | Bexleyheath and Crayford | Con | (2005-2010) | 0.7% |
| David Evennett | Bexleyheath and Crayford | Con | (2010-2015) | 0.5% |
| David Evennett | Bexleyheath and Crayford | Con | (2015-2017) | 0.0% |
| David Evennett | Bexleyheath and Crayford | Con | (2017-2019) | 0.9% |
| David Evennett | Bexleyheath and Crayford | Con | (2019-2024) | 0.1% |
| Ben Everitt | Milton Keynes North | Con | (2019-2024) | 0.6% |
| Ms Annabelle Ewing | Perth | SNP | (2001-2005) | 0.0% |
| Lord Ewing of Kirkford | (Lords) | Lab | (1992-2007) | 0.0% |
| Margaret Ewing | Moray | SNP | (1997-2001) | 0.0% |
| The Bishop of Exeter | (Lords) | Bishop | (2005-2013) | 3.2% |
| The Bishop of Exeter | (Lords) | Bishop | (2021-2023) | 0.0% |
| Lord Ezra | (Lords) | LDem | (1983-2015) | 0.3% |
| Mr David Faber | Westbury | Con | (1997-2001) | 0.5% |
| Michael Fabricant | Lichfield | Con | (1997-2001) | 1.2% |
| Michael Fabricant | Lichfield | Con | (2001-2005) | 1.4% |
| Michael Fabricant | Lichfield | Con | (2005-2010) | 1.8% |
| Michael Fabricant | Lichfield | Con | (2010-2015) | 1.2% |
| Michael Fabricant | Lichfield | Con | (2015-2017) | 0.8% |
| Michael Fabricant | Lichfield | Con | (2017-2019) | 2.8% |
| Michael Fabricant | Lichfield | Con | (2019-2024) | 1.0% |
| Miatta Fahnbulleh | Peckham | Lab | (2024-present) | 0.0% |
| Lord Fairfax of Cameron | (Lords) | Con | (2015-present) | 1.4% |
| Baroness Fairhead | (Lords) | Con | (2017-present) | 9.7% |
| Hamish Falconer | Lincoln | Lab | (2024-present) | 0.0% |
| Lord Falconer of Thoroton | (Lords) | Lab | (1997-present) | 0.4% |
| Baroness Falkender | (Lords) | Lab | (1974-2019) | 3.5% |
| Viscount Falkland | (Lords) | Crossbench | (2011-2023) | 27.9% |
| Viscount Falkland | (Lords) | LDem | (1984-2011) | 5.4% |
| Baroness Falkner of Margravine | (Lords) | Crossbench | (2020-present) | 31.8% |
| Baroness Falkner of Margravine | (Lords) | LDem | (2004-2019) | 3.5% |
| Baroness Falkner of Margravine | (Lords) | Non-affiliated | (2019-2020) | 45.8% |
| Baroness Fall | (Lords) | Con | (2015-present) | 0.5% |
| Michael Fallon | Sevenoaks | Con | (1997-2001) | 0.0% |
| Michael Fallon | Sevenoaks | Con | (2001-2005) | 1.2% |
| Michael Fallon | Sevenoaks | Con | (2005-2010) | 1.3% |
| Michael Fallon | Sevenoaks | Con | (2010-2015) | 0.5% |
| Michael Fallon | Sevenoaks | Con | (2015-2017) | 0.0% |
| Michael Fallon | Sevenoaks | Con | (2017-2019) | 1.6% |
| Lord Fanshawe of Richmond | (Lords) | Con | (1983-2001) | n/a |
| Nigel Farage | Clacton | Reform UK | (2024-present) | 1.4% |
| Lord Farmer | (Lords) | Con | (2014-present) | 1.9% |
| Linsey Farnsworth | Amber Valley | Lab | (2024-present) | 0.0% |
| Paul Farrelly | Newcastle-under-Lyme | Lab | (2001-2005) | 1.1% |
| Paul Farrelly | Newcastle-under-Lyme | Lab | (2005-2010) | 3.6% |
| Paul Farrelly | Newcastle-under-Lyme | Lab | (2010-2015) | 0.0% |
| Paul Farrelly | Newcastle-under-Lyme | Lab | (2015-2017) | 2.6% |
| Paul Farrelly | Newcastle-under-Lyme | Lab | (2017-2019) | 0.9% |
| Baroness Farrington of Ribbleton | (Lords) | Lab | (1994-2018) | 0.6% |
| Laura Farris | Newbury | Con | (2019-2024) | 0.5% |
| Tim Farron | Westmorland and Lonsdale | LDem | (2005-2010) | 2.1% |
| Tim Farron | Westmorland and Lonsdale | LDem | (2010-2015) | 3.5% |
| Tim Farron | Westmorland and Lonsdale | LDem | (2015-2017) | 0.6% |
| Tim Farron | Westmorland and Lonsdale | LDem | (2017-2019) | 1.0% |
| Tim Farron | Westmorland and Lonsdale | LDem | (2019-2024) | 0.4% |
| Tim Farron | Westmorland and Lonsdale | LDem | (2024-present) | 3.6% |
| Stephen Farry | North Down | Alliance | (2019-2024) | 0.0% |
| Mr Derek Fatchett | Leeds Central | Lab | (1997-1999) | 0.0% |
| Lord Faulkner of Worcester | (Lords) | Lab | (1999-present) | 1.3% |
| Lord Faulks | (Lords) | Con | (2010-2019) | 0.3% |
| Lord Faulks | (Lords) | Non-affiliated | (2019-present) | 64.8% |
| Lord Fearn | (Lords) | LDem | (2001-2018) | 3.6% |
| Mr Ronnie Fearn | Southport | LDem | (1997-2001) | 2.3% |
| Baroness Featherstone | (Lords) | LDem | (2015-present) | 0.1% |
| Lynne Featherstone | Hornsey and Wood Green | LDem | (2005-2010) | 0.5% |
| Lynne Featherstone | Hornsey and Wood Green | LDem | (2010-2015) | 0.2% |
| Lord Feldman | (Lords) | Con | (1996-2017) | 0.4% |
| Lord Feldman of Elstree | (Lords) | Con | (2010-present) | 0.0% |
| Lord Fellowes | (Lords) | Crossbench | (1999-2022) | 29.5% |
| Lord Fellowes of West Stafford | (Lords) | Con | (2011-present) | 0.0% |
| Marion Fellows | Motherwell and Wishaw | SNP | (2015-2017) | 0.7% |
| Marion Fellows | Motherwell and Wishaw | SNP | (2017-2019) | 0.0% |
| Marion Fellows | Motherwell and Wishaw | SNP | (2019-2024) | 0.0% |
| Simon Fell | Barrow and Furness | Con | (2019-2024) | 0.9% |
| Josh Fenton-Glynn | Calder Valley | Lab | (2024-present) | 1.2% |
| Fergus Ewing | Inverness and Nairn | SNP | (2011-2016) | n/a |
| Fergus Ewing | Inverness and Nairn | SNP | (2016-2021) | n/a |
| Fergus Ewing | Inverness and Nairn | SNP | (2021-present) | n/a |
| Fergus Ewing | Inverness East, Nairn and Lochaber | SNP | (2003-2007) | 1.5% |
| Fergus Ewing | Inverness East, Nairn and Lochaber | SNP | (1999-2003) | 5.2% |
| Fergus Ewing | Inverness East, Nairn and Lochaber | SNP | (2007-2011) | 0.0% |
| Mark Ferguson | Gateshead Central and Whickham | Lab | (2024-present) | 0.5% |
| Patricia Ferguson | Glasgow West | Lab | (2024-present) | 2.6% |
| Suella Fernandes | Fareham | Con | (2015-2017) | 0.0% |
| Earl Ferrers | (Lords) | Con | (1954-2012) | 0.9% |
| Margaret Ferrier | Rutherglen and Hamilton West | whilst Independent | (2020-2023) | n/a |
| Margaret Ferrier | Rutherglen and Hamilton West | SNP | (2015-2017) | 0.3% |
| Margaret Ferrier | Rutherglen and Hamilton West | whilst SNP | (2019-2020) | 0.0% |
| Lord Field of Birkenhead | (Lords) | Crossbench | (2020-2024) | 20.5% |
| Lord Field of Birkenhead | (Lords) | Non-affiliated | (2020-2020) | n/a |
| Frank Field | Birkenhead | whilst Independent | (2018-2019) | n/a |
| Frank Field | Birkenhead | Lab | (1997-2001) | 3.0% |
| Frank Field | Birkenhead | Lab | (2001-2005) | 6.7% |
| Frank Field | Birkenhead | Lab | (2005-2010) | 10.8% |
| Frank Field | Birkenhead | Lab | (2010-2015) | 2.8% |
| Frank Field | Birkenhead | Lab | (2015-2017) | 8.0% |
| Frank Field | Birkenhead | whilst Lab | (2017-2018) | 28.8% |
| Mark Field | Cities of London and Westminster | Con | (2001-2005) | 2.0% |
| Mark Field | Cities of London and Westminster | Con | (2005-2010) | 2.2% |
| Mark Field | Cities of London and Westminster | Con | (2010-2015) | 2.6% |
| Mark Field | Cities of London and Westminster | Con | (2015-2017) | 0.0% |
| Mark Field | Cities of London and Westminster | Con | (2017-2019) | 1.9% |
| Lord Filkin | (Lords) | Lab | (1999-2013) | 0.8% |
| Lord Filkin | (Lords) | Lab | (2019-present) | 0.0% |
| Lord Filkin | (Lords) | Non-affiliated | (2013-2019) | 0.0% |
| Lord Fink | (Lords) | Con | (2011-present) | 0.1% |
| Lord Finkelstein | (Lords) | Con | (2013-present) | 5.8% |
| Finlay Carson | Galloway and West Dumfries | Con | (2016-2021) | n/a |
| Finlay Carson | Galloway and West Dumfries | Con | (2021-present) | n/a |
| Baroness Finlay of Llandaff | (Lords) | Crossbench | (2001-present) | 16.9% |
| Baroness Finn | (Lords) | Con | (2015-present) | 0.0% |
| John Finucane | Belfast North | SF | (2019-2024) | n/a |
| John Finucane | Belfast North | SF | (2024-present) | n/a |
| Fiona Hyslop | Linlithgow | SNP | (2011-2016) | n/a |
| Fiona Hyslop | Linlithgow | SNP | (2016-2021) | n/a |
| Fiona Hyslop | Linlithgow | SNP | (2021-present) | n/a |
| Fiona Hyslop | Lothians | SNP | (2003-2007) | 0.9% |
| Fiona Hyslop | Lothians | SNP | (1999-2003) | 1.7% |
| Fiona Hyslop | Lothians | SNP | (2007-2011) | 0.2% |
| Fiona McLeod | Strathkelvin and Bearsden | SNP | (2011-2016) | n/a |
| Fiona McLeod | West of Scotland | SNP | (1999-2003) | 1.9% |
| Anna Firth | Southend West | Con | (2022-2024) | 0.2% |
| Mark Fisher | Stoke-on-Trent Central | Lab | (1997-2001) | 2.4% |
| Mark Fisher | Stoke-on-Trent Central | Lab | (2001-2005) | 11.0% |
| Mark Fisher | Stoke-on-Trent Central | Lab | (2005-2010) | 10.0% |
| Baroness Fisher of Rednal | (Lords) | Lab | (1974-2005) | n/a |
| Lord Fitt | (Lords) | Independent Socialist | (1983-2005) | n/a |
| Jim Fitzpatrick | Poplar and Canning Town | Lab | (1997-2001) | 0.3% |
| Jim Fitzpatrick | Poplar and Canning Town | Lab | (2001-2005) | 0.9% |
| Jim Fitzpatrick | Poplar and Canning Town | Lab | (2005-2010) | 1.4% |
| Jim Fitzpatrick | Poplar and Limehouse | Lab | (2010-2015) | 1.2% |
| Jim Fitzpatrick | Poplar and Limehouse | Lab | (2015-2017) | 2.1% |
| Jim Fitzpatrick | Poplar and Limehouse | Lab | (2017-2019) | 5.1% |
| Ms Lorna Fitzsimons | Rochdale | Lab | (1997-2001) | 0.3% |
| Ms Lorna Fitzsimons | Rochdale | Lab | (2001-2005) | 0.9% |
| Baroness Flather | (Lords) | Con | (1990-1998) | n/a |
| Baroness Flather | (Lords) | Con | (1999-2008) | n/a |
| Baroness Flather | (Lords) | Crossbench | (1999-1999) | n/a |
| Baroness Flather | (Lords) | Crossbench | (2008-2024) | 63.6% |
| Baroness Fleet | (Lords) | Con | (2020-present) | 0.0% |
| Natalie Fleet | Bolsover | Lab | (2024-present) | 0.0% |
| Rob Flello | Stoke-on-Trent South | Lab | (2005-2010) | 1.0% |
| Rob Flello | Stoke-on-Trent South | Lab | (2010-2015) | 1.3% |
| Rob Flello | Stoke-on-Trent South | Lab | (2015-2017) | 0.7% |
| Colleen Fletcher | Coventry North East | Lab | (2015-2017) | 0.3% |
| Colleen Fletcher | Coventry North East | Lab | (2017-2019) | 0.0% |
| Colleen Fletcher | Coventry North East | Lab | (2019-2024) | 0.0% |
| Katherine Fletcher | South Ribble | Con | (2019-2024) | 0.4% |
| Mark Fletcher | Bolsover | Con | (2019-2024) | 0.2% |
| Nicholas Fletcher | Don Valley | Con | (2019-2024) | 1.0% |
| Lord Flight | (Lords) | Con | (2011-present) | 3.2% |
| Mr Howard Flight | Arundel and South Downs | Con | (1997-2001) | 0.3% |
| Mr Howard Flight | Arundel and South Downs | whilst Con | (2001-2005) | 0.5% |
| Mr Howard Flight | Arundel and South Downs | whilst Independent | (2005-2005) | n/a |
| Caroline Flint | Don Valley | Lab | (1997-2001) | 0.1% |
| Caroline Flint | Don Valley | Lab | (2001-2005) | 0.3% |
| Caroline Flint | Don Valley | Lab | (2005-2010) | 0.4% |
| Caroline Flint | Don Valley | Lab | (2010-2015) | 0.0% |
| Caroline Flint | Don Valley | Lab | (2015-2017) | 0.9% |
| Caroline Flint | Don Valley | Lab | (2017-2019) | 8.3% |
| Mr Adrian Flook | Taunton | Con | (2001-2005) | 0.8% |
| Lord Flowers | (Lords) | Crossbench | (1979-2010) | 50.0% |
| Paul Flynn | Newport West | Lab | (1997-2001) | 3.3% |
| Paul Flynn | Newport West | Lab | (2001-2005) | 4.8% |
| Paul Flynn | Newport West | Lab | (2005-2010) | 8.7% |
| Paul Flynn | Newport West | Lab | (2010-2015) | 3.7% |
| Paul Flynn | Newport West | Lab | (2015-2017) | 3.6% |
| Paul Flynn | Newport West | Lab | (2017-2019) | 0.0% |
| Stephen Flynn | Aberdeen South | SNP | (2019-2024) | 0.0% |
| Stephen Flynn | Aberdeen South | SNP | (2024-present) | 0.0% |
| Barbara Follett | Stevenage | Lab | (1997-2001) | 0.1% |
| Barbara Follett | Stevenage | Lab | (2001-2005) | 3.0% |
| Barbara Follett | Stevenage | Lab | (2005-2010) | 0.5% |
| Emma Foody | Cramlington and Killingworth | Lab | (2024-present) | 0.0% |
| Baroness Fookes | (Lords) | Con | (1997-present) | 1.8% |
| Catherine Fookes | Monmouthshire | Lab | (2024-present) | 0.0% |
| Richard Foord | Honiton and Sidmouth | LDem | (2024-present) | 0.0% |
| Richard Foord | Tiverton and Honiton | LDem | (2022-2024) | 0.3% |
| Lisa Forbes | Peterborough | Lab | (2019-2019) | 0.0% |
| Baroness Ford | (Lords) | Crossbench | (2016-present) | 2.2% |
| Baroness Ford | (Lords) | Lab | (2006-2009) | 0.0% |
| Baroness Ford | (Lords) | Lab | (2010-2013) | n/a |
| Baroness Ford | (Lords) | Non-affiliated | (2009-2010) | n/a |
| Baroness Ford | (Lords) | Non-affiliated | (2013-2016) | 0.0% |
| Vicky Ford | Chelmsford | Con | (2017-2019) | 2.3% |
| Vicky Ford | Chelmsford | Con | (2019-2024) | 0.7% |
| Will Forster | Woking | LDem | (2024-present) | 1.5% |
| Lord Forsyth of Drumlean | (Lords) | Con | (1999-present) | 4.1% |
| Mr Clifford Forsythe | South Antrim | UUP | (1997-2000) | 1.7% |
| Lord Forte | (Lords) | Con | (1982-2007) | n/a |
| Eric Forth | Bromley and Chislehurst | Con | (1997-2001) | 2.6% |
| Eric Forth | Bromley and Chislehurst | Con | (2001-2005) | 1.6% |
| Eric Forth | Bromley and Chislehurst | Con | (2005-2006) | 5.1% |
| Peter Fortune | Bromley and Biggin Hill | Con | (2024-present) | 1.4% |
| Baroness Foster of Aghadrumsee | (Lords) | Non-affiliated | (2022-present) | 62.3% |
| Lord Foster of Bath | (Lords) | LDem | (2015-present) | 0.1% |
| Lord Foster of Bishop Auckland | (Lords) | Lab | (2005-2019) | 0.8% |
| Mr Derek Foster | Bishop Auckland | Lab | (1997-2001) | 0.9% |
| Mr Derek Foster | Bishop Auckland | Lab | (2001-2005) | 0.5% |
| Don Foster | Bath | LDem | (2010-2015) | 0.9% |
| Don Foster | Bath | LDem | (1997-2001) | 0.5% |
| Don Foster | Bath | LDem | (2001-2005) | 1.3% |
| Don Foster | Bath | LDem | (2005-2010) | 1.0% |
| Kevin Foster | Torbay | Con | (2015-2017) | 0.7% |
| Kevin Foster | Torbay | Con | (2017-2019) | 1.6% |
| Kevin Foster | Torbay | Con | (2019-2024) | 0.4% |
| Michael Foster | Worcester | Lab | (1997-2001) | 0.1% |
| Michael Foster | Worcester | Lab | (2001-2005) | 0.3% |
| Michael Foster | Worcester | Lab | (2005-2010) | 0.8% |
| Michael Jabez Foster | Hastings and Rye | Lab | (1997-2001) | 0.2% |
| Michael Jabez Foster | Hastings and Rye | Lab | (2001-2005) | 0.9% |
| Michael Jabez Foster | Hastings and Rye | Lab | (2005-2010) | 1.9% |
| Baroness Foster of Oxton | (Lords) | Con | (2021-present) | 2.0% |
| Paul Foster | South Ribble | Lab | (2024-present) | 0.0% |
| Lord Foster of Thames Bank | (Lords) | Crossbench | (1999-2010) | 0.0% |
| Lord Foulkes of Cumnock | (Lords) | Lab | (2005-present) | 0.7% |
| Mr George Foulkes | Carrick, Cumnock and Doon Valley | Lab | (1997-2001) | 0.5% |
| Mr George Foulkes | Carrick, Cumnock and Doon Valley | Lab | (2001-2005) | 0.9% |
| Yvonne Fovargue | Makerfield | Lab | (2010-2015) | 0.1% |
| Yvonne Fovargue | Makerfield | Lab | (2015-2017) | 0.0% |
| Yvonne Fovargue | Makerfield | Lab | (2017-2019) | 1.5% |
| Yvonne Fovargue | Makerfield | Lab | (2019-2024) | 0.0% |
| Lord Fowler | (Lords) | Con | (2001-2016) | 1.8% |
| Lord Fowler | (Lords) | Non-affiliated | (2016-present) | 63.1% |
| Mr Norman Fowler | Sutton Coldfield | Con | (1997-2001) | 0.7% |
| Lord Fox | (Lords) | LDem | (2014-present) | 0.1% |
| Ashley Fox | Bridgwater | Con | (2024-present) | 2.6% |
| Baroness Fox of Buckley | (Lords) | Non-affiliated | (2020-present) | 52.9% |
| Vicky Foxcroft | Lewisham North | Lab | (2024-present) | 1.6% |
| Vicky Foxcroft | Lewisham, Deptford | Lab | (2015-2017) | 1.1% |
| Vicky Foxcroft | Lewisham, Deptford | Lab | (2017-2019) | 0.3% |
| Vicky Foxcroft | Lewisham, Deptford | Lab | (2019-2024) | 0.0% |
| Liam Fox | North Somerset | Con | (2010-2015) | 1.5% |
| Liam Fox | North Somerset | Con | (2015-2017) | 0.6% |
| Liam Fox | North Somerset | Con | (2017-2019) | 0.3% |
| Liam Fox | North Somerset | Con | (2019-2024) | 0.9% |
| Liam Fox | Woodspring | Con | (1997-2001) | 0.0% |
| Liam Fox | Woodspring | Con | (2001-2005) | 0.5% |
| Liam Fox | Woodspring | Con | (2005-2010) | 1.4% |
| Mary Foy | City of Durham | Lab | (2019-2024) | 0.4% |
| Mary Foy | City of Durham | Lab | (2024-present) | 3.5% |
| Foysol Choudhury | Lothian | Lab | (2021-present) | n/a |
| Lord Framlingham | (Lords) | Con | (2011-present) | 4.2% |
| Frances Curran | West of Scotland | SSP | (2003-2007) | 0.2% |
| Daniel Francis | Bexleyheath and Crayford | Lab | (2024-present) | 2.2% |
| Hywel Francis | Aberavon | Lab | (2001-2005) | 1.0% |
| Hywel Francis | Aberavon | Lab | (2005-2010) | 0.4% |
| Hywel Francis | Aberavon | Lab | (2010-2015) | 0.2% |
| Mark Francois | Rayleigh | Con | (2001-2005) | 0.5% |
| Mark Francois | Rayleigh | Con | (2005-2010) | 0.4% |
| Mark Francois | Rayleigh and Wickford | Con | (2010-2015) | 0.5% |
| Mark Francois | Rayleigh and Wickford | Con | (2015-2017) | 0.0% |
| Mark Francois | Rayleigh and Wickford | Con | (2017-2019) | 3.2% |
| Mark Francois | Rayleigh and Wickford | Con | (2019-2024) | 3.1% |
| Mark Francois | Rayleigh and Wickford | Con | (2024-present) | 0.0% |
| Frank McAveety | Glasgow Shettleston | Lab | (2003-2007) | 0.2% |
| Frank McAveety | Glasgow Shettleston | Lab | (1999-2003) | 0.6% |
| Frank McAveety | Glasgow Shettleston | Lab | (2007-2011) | 0.9% |
| Zöe Franklin | Guildford | LDem | (2024-present) | 0.0% |
| Lord Fraser of Carmyllie | (Lords) | Con | (1989-2013) | 1.7% |
| Christopher Fraser | Mid Dorset and North Poole | Con | (1997-2001) | 0.0% |
| Christopher Fraser | South West Norfolk | Con | (2005-2010) | 0.8% |
| Lord Fraser of Corriegarth | (Lords) | Con | (2016-2021) | 1.8% |
| Baroness Fraser of Craigmaddie | (Lords) | Con | (2021-present) | 0.6% |
| Lucy Frazer | South East Cambridgeshire | Con | (2015-2017) | 0.2% |
| Lucy Frazer | South East Cambridgeshire | Con | (2017-2019) | 0.5% |
| Lucy Frazer | South East Cambridgeshire | Con | (2019-2024) | 0.1% |
| Lord Freeman | (Lords) | Con | (1997-2020) | 0.7% |
| George Freeman | Mid Norfolk | Con | (2010-2015) | 0.6% |
| George Freeman | Mid Norfolk | Con | (2015-2017) | 0.0% |
| George Freeman | Mid Norfolk | Con | (2017-2019) | 5.6% |
| George Freeman | Mid Norfolk | Con | (2019-2024) | 0.6% |
| George Freeman | Mid Norfolk | Con | (2024-present) | 1.0% |
| Baroness Freeman of Steventon | (Lords) | Crossbench | (2024-present) | 13.5% |
| Mike Freer | Finchley and Golders Green | Con | (2010-2015) | 2.0% |
| Mike Freer | Finchley and Golders Green | Con | (2015-2017) | 0.0% |
| Mike Freer | Finchley and Golders Green | Con | (2017-2019) | 2.6% |
| Mike Freer | Finchley and Golders Green | Con | (2019-2024) | 0.2% |
| Louie French | Old Bexley and Sidcup | Con | (2021-2024) | 0.2% |
| Louie French | Old Bexley and Sidcup | Con | (2024-present) | 0.0% |
| Lord Freud | (Lords) | Con | (2009-present) | 1.0% |
| Lord Freyberg | (Lords) | Crossbench | (1993-present) | 15.7% |
| Baroness Fritchie | (Lords) | Crossbench | (2005-2024) | 14.1% |
| James Frith | Bury North | Lab | (2017-2019) | 0.3% |
| James Frith | Bury North | Lab | (2024-present) | 1.7% |
| Lord Frost | (Lords) | Con | (2020-present) | 0.5% |
| Baroness Fullbrook | (Lords) | Con | (2020-present) | 0.6% |
| Lorraine Fullbrook | South Ribble | Con | (2010-2015) | 1.6% |
| Lord Fuller | (Lords) | Con | (2024-present) | 0.8% |
| Richard Fuller | Bedford | Con | (2010-2015) | 1.7% |
| Richard Fuller | Bedford | Con | (2015-2017) | 0.5% |
| Richard Fuller | North Bedfordshire | Con | (2024-present) | 0.0% |
| Richard Fuller | North East Bedfordshire | Con | (2019-2024) | 1.1% |
| Fulton MacGregor | Coatbridge and Chryston | SNP | (2016-2021) | n/a |
| Fulton MacGregor | Coatbridge and Chryston | SNP | (2021-present) | n/a |
| Gill Furniss | Sheffield Brightside and Hillsborough | Lab | (2024-present) | 0.6% |
| Gill Furniss | Sheffield, Brightside and Hillsborough | Lab | (2016-2017) | 0.7% |
| Gill Furniss | Sheffield, Brightside and Hillsborough | Lab | (2017-2019) | 0.0% |
| Gill Furniss | Sheffield, Brightside and Hillsborough | Lab | (2019-2024) | 0.6% |
| Lord Fyfe of Fairfield | (Lords) | Lab | (2000-2011) | 1.8% |
| Mrs Maria Fyfe | Glasgow Maryhill | Lab | (1997-2001) | 2.3% |
| Marcus Fysh | Yeovil | Con | (2015-2017) | 0.0% |
| Marcus Fysh | Yeovil | Con | (2017-2019) | 3.5% |
| Marcus Fysh | Yeovil | Con | (2019-2024) | 2.2% |
| Lord Gadhia | (Lords) | Con | (2016-2017) | 0.0% |
| Lord Gadhia | (Lords) | Non-affiliated | (2017-present) | 66.2% |
| Hugh Gaffney | Coatbridge, Chryston and Bellshill | Lab | (2017-2019) | 0.0% |
| Gail Ross | Caithness, Sutherland and Ross | SNP | (2016-2021) | n/a |
| Sam Galbraith | Strathkelvin and Bearsden | Lab | (1997-2001) | 1.3% |
| Baroness Gale | (Lords) | Lab | (1999-present) | 1.0% |
| Roger Gale | Herne Bay and Sandwich | Con | (2024-present) | 0.7% |
| Roger Gale | North Thanet | Con | (1997-2001) | 2.2% |
| Roger Gale | North Thanet | Con | (2001-2005) | 3.2% |
| Roger Gale | North Thanet | Con | (2005-2010) | 0.7% |
| Roger Gale | North Thanet | Con | (2010-2015) | 2.1% |
| Roger Gale | North Thanet | Con | (2015-2017) | 0.7% |
| Roger Gale | North Thanet | Con | (2017-2019) | 1.9% |
| Roger Gale | North Thanet | Con | (2019-2024) | 4.3% |
| Lord Gallacher | (Lords) | Lab | (1983-2004) | n/a |
| George Galloway | Bethnal Green and Bow | Respect | (2005-2010) | 0.0% |
| George Galloway | Bradford West | Respect | (2012-2015) | 0.0% |
| George Galloway | Glasgow Kelvin | whilst Independent | (2003-2005) | n/a |
| George Galloway | Glasgow Kelvin | Lab | (1997-2001) | 0.8% |
| George Galloway | Glasgow Kelvin | whilst Lab | (2001-2003) | 12.9% |
| George Galloway | Rochdale | Workers Party | (2024-2024) | 0.0% |
| Mike Gapes | Ilford South | whilst Independent | (2019-2019) | n/a |
| Mike Gapes | Ilford South | Lab | (1997-2001) | 0.7% |
| Mike Gapes | Ilford South | Lab | (2001-2005) | 0.9% |
| Mike Gapes | Ilford South | Lab | (2005-2010) | 0.9% |
| Mike Gapes | Ilford South | Lab | (2010-2015) | 0.5% |
| Mike Gapes | Ilford South | Lab | (2015-2017) | 2.6% |
| Mike Gapes | Ilford South | whilst Lab | (2017-2019) | 0.7% |
| Lord Garden | (Lords) | LDem | (2004-2007) | 0.6% |
| Baroness Garden of Frognal | (Lords) | LDem | (2007-present) | 0.9% |
| Barry Gardiner | Brent North | Lab | (1997-2001) | 0.5% |
| Barry Gardiner | Brent North | Lab | (2001-2005) | 0.6% |
| Barry Gardiner | Brent North | Lab | (2005-2010) | 0.4% |
| Barry Gardiner | Brent North | Lab | (2010-2015) | 0.8% |
| Barry Gardiner | Brent North | Lab | (2015-2017) | 0.3% |
| Barry Gardiner | Brent North | Lab | (2017-2019) | 0.5% |
| Barry Gardiner | Brent North | Lab | (2019-2024) | 0.1% |
| Barry Gardiner | Brent West | Lab | (2024-present) | 2.2% |
| Lord Gardiner of Kimble | (Lords) | Con | (2010-present) | 0.5% |
| Allison Gardner | Stoke-on-Trent South | Lab | (2024-present) | 1.7% |
| Baroness Gardner of Parkes | (Lords) | Con | (1981-2024) | 2.4% |
| Lord Garel-Jones | (Lords) | Con | (1997-2020) | 6.2% |
| Lord Garnier | (Lords) | Con | (2018-present) | 4.7% |
| Edward Garnier | Harborough | Con | (1997-2001) | 0.4% |
| Edward Garnier | Harborough | Con | (2001-2005) | 1.5% |
| Edward Garnier | Harborough | Con | (2005-2010) | 1.5% |
| Edward Garnier | Harborough | Con | (2010-2015) | 1.1% |
| Edward Garnier | Harborough | Con | (2015-2017) | 0.0% |
| Mark Garnier | Wyre Forest | Con | (2010-2015) | 1.6% |
| Mark Garnier | Wyre Forest | Con | (2015-2017) | 0.0% |
| Mark Garnier | Wyre Forest | Con | (2017-2019) | 1.4% |
| Mark Garnier | Wyre Forest | Con | (2019-2024) | 0.5% |
| Mark Garnier | Wyre Forest | Con | (2024-present) | 2.2% |
| Lord Gascoigne | (Lords) | Con | (2023-present) | 1.2% |
| David Gauke | South West Hertfordshire | Con | (2005-2010) | 1.1% |
| David Gauke | South West Hertfordshire | Con | (2010-2015) | 0.6% |
| David Gauke | South West Hertfordshire | Con | (2015-2017) | 0.0% |
| David Gauke | South West Hertfordshire | whilst Con | (2017-2019) | 1.6% |
| David Gauke | South West Hertfordshire | whilst Independent | (2019-2019) | n/a |
| Gavin Brown | Lothian | Con | (2011-2016) | n/a |
| Gavin Brown | Lothians | Con | (2007-2011) | 0.2% |
| Lord Gavron | (Lords) | Lab | (1999-2015) | 1.7% |
| Lord Geddes | (Lords) | Con | (1975-present) | 0.5% |
| Lord Geidt | (Lords) | Crossbench | (2017-present) | 36.5% |
| Anna Gelderd | South East Cornwall | Lab | (2024-present) | 0.0% |
| Alan Gemmell | Central Ayrshire | Lab | (2024-present) | 0.0% |
| Lord George | (Lords) | Crossbench | (2004-2009) | n/a |
| George Lyon | Argyll and Bute | LDem | (2003-2007) | 0.2% |
| George Lyon | Argyll and Bute | LDem | (1999-2003) | 1.6% |
| Lord George [Missing last name for 80312] | Lothians | Lab | (2007-2011) | 0.4% |
| George Reid | Mid Scotland and Fife | SNP | (1999-2003) | 4.1% |
| George Reid | Ochil | None | (2003-2007) | n/a |
| George Reid | Ochil | SNP | (2003-2003) | n/a |
| George Adam | Paisley | SNP | (2011-2016) | n/a |
| George Adam | Paisley | SNP | (2016-2021) | n/a |
| George Adam | Paisley | SNP | (2021-present) | n/a |
| Andrew George | St Ives | LDem | (1997-2001) | 1.1% |
| Andrew George | St Ives | LDem | (2001-2005) | 2.5% |
| Andrew George | St Ives | LDem | (2005-2010) | 0.6% |
| Andrew George | St Ives | LDem | (2010-2015) | 7.6% |
| Andrew George | St Ives | LDem | (2024-present) | 0.0% |
| Bruce George | Walsall South | Lab | (1997-2001) | 1.0% |
| Bruce George | Walsall South | Lab | (2001-2005) | 0.9% |
| Bruce George | Walsall South | Lab | (2005-2010) | 0.9% |
| Ruth George | High Peak | Lab | (2017-2019) | 0.3% |
| Lord Geraint | (Lords) | LDem | (1992-2004) | 3.8% |
| Lord German | (Lords) | LDem | (2010-present) | 0.4% |
| Gill German | Clwyd North | Lab | (2024-present) | 0.6% |
| Neil Gerrard | Walthamstow | Lab | (1997-2001) | 2.7% |
| Neil Gerrard | Walthamstow | Lab | (2001-2005) | 7.6% |
| Neil Gerrard | Walthamstow | Lab | (2005-2010) | 5.5% |
| Stephen Gethins | Arbroath and Broughty Ferry | SNP | (2024-present) | 0.0% |
| Stephen Gethins | North East Fife | SNP | (2015-2017) | 0.3% |
| Stephen Gethins | North East Fife | SNP | (2017-2019) | 0.0% |
| Nusrat Ghani | Sussex Weald | Con | (2024-present) | 0.0% |
| Nusrat Ghani | Wealden | Con | (2015-2017) | 0.2% |
| Nusrat Ghani | Wealden | Con | (2017-2019) | 0.9% |
| Nusrat Ghani | Wealden | Con | (2019-2024) | 1.2% |
| Nick Gibb | Bognor Regis and Littlehampton | Con | (1997-2001) | 0.1% |
| Nick Gibb | Bognor Regis and Littlehampton | Con | (2001-2005) | 1.5% |
| Nick Gibb | Bognor Regis and Littlehampton | Con | (2005-2010) | 0.7% |
| Nick Gibb | Bognor Regis and Littlehampton | Con | (2010-2015) | 0.8% |
| Nick Gibb | Bognor Regis and Littlehampton | Con | (2015-2017) | 0.2% |
| Nick Gibb | Bognor Regis and Littlehampton | Con | (2017-2019) | 1.2% |
| Nick Gibb | Bognor Regis and Littlehampton | Con | (2019-2024) | 0.0% |
| Lord Gibson | (Lords) | Crossbench | (1975-2004) | 0.0% |
| Lord Gibson-Watt | (Lords) | Con | (1979-2002) | n/a |
| Ian Gibson | Norwich North | Lab | (1997-2001) | 1.5% |
| Ian Gibson | Norwich North | Lab | (2001-2005) | 5.5% |
| Ian Gibson | Norwich North | Lab | (2005-2009) | 7.0% |
| Baroness Gibson of Market Rasen | (Lords) | Lab | (2000-2018) | 1.0% |
| Patricia Gibson | North Ayrshire and Arran | SNP | (2015-2017) | 0.0% |
| Patricia Gibson | North Ayrshire and Arran | SNP | (2017-2019) | 0.0% |
| Patricia Gibson | North Ayrshire and Arran | SNP | (2019-2024) | 0.0% |
| Peter Gibson | Darlington | Con | (2019-2024) | 0.7% |
| Sarah Gibson | Chippenham | LDem | (2024-present) | 0.9% |
| Lord Giddens | (Lords) | Lab | (2004-present) | 0.6% |
| Jo Gideon | Stoke-on-Trent Central | Con | (2019-2024) | 0.4% |
| Sandra Gidley | Romsey | LDem | (2000-2001) | 1.5% |
| Sandra Gidley | Romsey | LDem | (2001-2005) | 1.0% |
| Sandra Gidley | Romsey | LDem | (2005-2010) | 0.7% |
| Gil Paterson | Central Scotland | SNP | (1999-2003) | 2.2% |
| Gil Paterson | Clydebank and Milngavie | SNP | (2011-2016) | n/a |
| Gil Paterson | Clydebank and Milngavie | SNP | (2016-2021) | n/a |
| Gil Paterson | West of Scotland | SNP | (2007-2011) | 0.0% |
| Lord Gilbert | (Lords) | Lab | (1997-2013) | 3.2% |
| Lord Gilbert of Panteg | (Lords) | Con | (2015-present) | 0.6% |
| Stephen Gilbert | St Austell and Newquay | LDem | (2010-2015) | 1.6% |
| Tracy Gilbert | Edinburgh North and Leith | Lab | (2024-present) | 0.0% |
| Michelle Gildernew | Fermanagh and South Tyrone | SF | (2001-2005) | n/a |
| Michelle Gildernew | Fermanagh and South Tyrone | SF | (2005-2010) | n/a |
| Michelle Gildernew | Fermanagh and South Tyrone | SF | (2010-2015) | n/a |
| Michelle Gildernew | Fermanagh and South Tyrone | SF | (2017-2019) | n/a |
| Michelle Gildernew | Fermanagh and South Tyrone | SF | (2019-2024) | n/a |
| Dame Cheryl Gillan | Chesham and Amersham | Con | (2015-2017) | 1.7% |
| Dame Cheryl Gillan | Chesham and Amersham | Con | (2017-2019) | 3.5% |
| Dame Cheryl Gillan | Chesham and Amersham | Con | (1997-2001) | 0.0% |
| Dame Cheryl Gillan | Chesham and Amersham | Con | (2001-2005) | 0.5% |
| Dame Cheryl Gillan | Chesham and Amersham | Con | (2005-2010) | 1.2% |
| Dame Cheryl Gillan | Chesham and Amersham | Con | (2010-2015) | 2.0% |
| Dame Cheryl Gillan | Chesham and Amersham | Con | (2019-2021) | 4.4% |
| Mr Christopher Gill | Ludlow | Con | (1997-2001) | 0.3% |
| Gillian Martin | Aberdeenshire East | SNP | (2016-2021) | n/a |
| Gillian Martin | Aberdeenshire East | SNP | (2021-present) | n/a |
| Gillian Mackay | Central Scotland | Green | (2021-present) | n/a |
| Mr Parmjit Gill | Leicester South | LDem | (2004-2005) | 2.0% |
| Preet Kaur Gill | Birmingham Edgbaston | Lab | (2024-present) | 0.6% |
| Preet Kaur Gill | Birmingham, Edgbaston | Lab | (2017-2019) | 0.3% |
| Preet Kaur Gill | Birmingham, Edgbaston | Lab | (2019-2024) | 0.0% |
| Sheila Gilmore | Edinburgh East | Lab | (2010-2015) | 0.0% |
| Lord Gilmour of Craigmillar | (Lords) | Con | (1992-2007) | 4.9% |
| Rachel Gilmour | Tiverton and Minehead | LDem | (2024-present) | 1.5% |
| Linda Gilroy | Plymouth, Sutton | Lab | (1997-2001) | 0.2% |
| Linda Gilroy | Plymouth, Sutton | Lab | (2001-2005) | 0.5% |
| Linda Gilroy | Plymouth, Sutton | Lab | (2005-2010) | 0.4% |
| Paul Girvan | South Antrim | DUP | (2017-2019) | 0.0% |
| Paul Girvan | South Antrim | DUP | (2019-2024) | 0.6% |
| Becky Gittins | Clwyd East | Lab | (2024-present) | 0.0% |
| Lord Gladwin of Clee | (Lords) | Lab | (1994-2003) | 0.0% |
| The Earl of Glasgow | (Lords) | LDem | (2005-present) | 1.9% |
| Lord Glasman | (Lords) | Lab | (2011-present) | 0.7% |
| Pat Glass | North West Durham | Lab | (2010-2015) | 0.4% |
| Pat Glass | North West Durham | Lab | (2015-2017) | 0.0% |
| Lord Glenamara | (Lords) | Lab | (1977-2012) | n/a |
| Lord Glenarthur | (Lords) | Con | (1976-present) | 3.5% |
| Lord Glendonbrook | (Lords) | Con | (2011-present) | 0.4% |
| John Glen | Salisbury | Con | (2010-2015) | 0.9% |
| John Glen | Salisbury | Con | (2015-2017) | 0.0% |
| John Glen | Salisbury | Con | (2017-2019) | 0.5% |
| John Glen | Salisbury | Con | (2019-2024) | 0.1% |
| John Glen | Salisbury | Con | (2024-present) | 1.5% |
| Lord Glentoran | (Lords) | Con | (1995-2018) | 0.7% |
| Mary Glindon | Newcastle upon Tyne East and Wallsend | Lab | (2024-present) | 2.9% |
| Mary Glindon | North Tyneside | Lab | (2010-2015) | 2.5% |
| Mary Glindon | North Tyneside | Lab | (2015-2017) | 0.8% |
| Mary Glindon | North Tyneside | Lab | (2017-2019) | 1.0% |
| Mary Glindon | North Tyneside | Lab | (2019-2024) | 0.1% |
| The Bishop of Gloucester | (Lords) | Bishop | (1998-2003) | 0.0% |
| The Bishop of Gloucester | (Lords) | Bishop | (2009-2014) | 0.0% |
| The Bishop of Gloucester | (Lords) | Bishop | (2015-present) | 0.0% |
| Olly Glover | Didcot and Wantage | LDem | (2024-present) | 0.0% |
| Lord Goddard of Stockport | (Lords) | LDem | (2014-present) | 0.4% |
| Dr Norman Godman | Greenock and Inverclyde | Lab | (1997-2001) | 4.0% |
| Roger Godsiff | Birmingham, Hall Green | Lab | (2010-2015) | 2.6% |
| Roger Godsiff | Birmingham, Hall Green | Lab | (2015-2017) | 1.8% |
| Roger Godsiff | Birmingham, Hall Green | Lab | (2017-2019) | 4.0% |
| Roger Godsiff | Birmingham, Sparkbrook and Small Heath | Lab | (1997-2001) | 0.2% |
| Roger Godsiff | Birmingham, Sparkbrook and Small Heath | Lab | (2001-2005) | 1.9% |
| Roger Godsiff | Birmingham, Sparkbrook and Small Heath | Lab | (2005-2010) | 6.7% |
| Lord Godson | (Lords) | Con | (2021-present) | 0.2% |
| Lord Goff of Chieveley | (Lords) | Crossbench | (1986-2016) | 0.0% |
| Paul Goggins | Wythenshawe and Sale East | Lab | (1997-2001) | 0.1% |
| Paul Goggins | Wythenshawe and Sale East | Lab | (2001-2005) | 0.2% |
| Paul Goggins | Wythenshawe and Sale East | Lab | (2005-2010) | 1.3% |
| Paul Goggins | Wythenshawe and Sale East | Lab | (2010-2014) | 1.5% |
| Baroness Gohir | (Lords) | Crossbench | (2022-present) | 4.0% |
| Lord Gold | (Lords) | Con | (2011-present) | 1.3% |
| Baroness Goldie | (Lords) | Con | (2013-present) | 0.1% |
| Baroness Golding | (Lords) | Lab | (2001-present) | 1.4% |
| Mrs Llin Golding | Newcastle-under-Lyme | Lab | (1997-2001) | 3.3% |
| Marie Goldman | Chelmsford | LDem | (2024-present) | 0.0% |
| Ben Goldsborough | South Norfolk | Lab | (2024-present) | 0.6% |
| Lord Goldsmith | (Lords) | Lab | (1999-present) | 0.2% |
| Lord Goldsmith of Richmond Park | (Lords) | Con | (2020-present) | 0.0% |
| Zac Goldsmith | Richmond Park | Con | (2010-2015) | 9.5% |
| Zac Goldsmith | Richmond Park | Con | (2015-2016) | 3.4% |
| Zac Goldsmith | Richmond Park | Con | (2017-2019) | 2.2% |
| Julia Goldsworthy | Falmouth and Camborne | LDem | (2005-2010) | 0.2% |
| Lord Goodhart | (Lords) | LDem | (1997-2015) | 2.8% |
| Lord Goodlad | (Lords) | Con | (2005-2024) | 1.0% |
| Mr Alastair Goodlad | Eddisbury | Con | (1997-1999) | 1.0% |
| Helen Goodman | Bishop Auckland | Lab | (2005-2010) | 1.3% |
| Helen Goodman | Bishop Auckland | Lab | (2010-2015) | 0.9% |
| Helen Goodman | Bishop Auckland | Lab | (2015-2017) | 1.3% |
| Helen Goodman | Bishop Auckland | Lab | (2017-2019) | 0.8% |
| Paul Goodman | Wycombe | Con | (2001-2005) | 1.0% |
| Paul Goodman | Wycombe | Con | (2005-2010) | 0.3% |
| Lord Goodman of Wycombe | (Lords) | Con | (2024-present) | 0.0% |
| Robert Goodwill | Scarborough and Whitby | Con | (2005-2010) | 1.8% |
| Robert Goodwill | Scarborough and Whitby | Con | (2010-2015) | 0.5% |
| Robert Goodwill | Scarborough and Whitby | Con | (2015-2017) | 0.0% |
| Robert Goodwill | Scarborough and Whitby | Con | (2017-2019) | 1.4% |
| Robert Goodwill | Scarborough and Whitby | Con | (2019-2024) | 1.0% |
| Gordon MacDonald | Edinburgh Pentlands | SNP | (2011-2016) | n/a |
| Gordon MacDonald | Edinburgh Pentlands | SNP | (2016-2021) | n/a |
| Gordon MacDonald | Edinburgh Pentlands | SNP | (2021-present) | n/a |
| Gordon Jackson | Glasgow Govan | Lab | (2003-2007) | 0.2% |
| Gordon Jackson | Glasgow Govan | Lab | (1999-2003) | 1.2% |
| Gordon Lindhurst | Lothian | Con | (2016-2021) | n/a |
| Mrs Eileen Gordon | Romford | Lab | (1997-2001) | 1.1% |
| Lord Gordon of Strathblane | (Lords) | Lab | (1997-2020) | 2.9% |
| Tom Gordon | Harrogate and Knaresborough | LDem | (2024-present) | 0.0% |
| Mrs Teresa Gorman | Billericay | Con | (1997-2001) | 0.7% |
| Donald Gorrie | Edinburgh West | LDem | (1997-2001) | 2.5% |
| Viscount Goschen | (Lords) | Con | (1977-present) | 0.7% |
| Jodie Gosling | Nuneaton | Lab | (2024-present) | 0.0% |
| Baroness Goudie | (Lords) | Lab | (1998-present) | 0.3% |
| Lord Gould of Brookwood | (Lords) | Lab | (2004-2011) | 0.4% |
| Georgia Gould | Queen's Park and Maida Vale | Lab | (2024-present) | 0.0% |
| Baroness Gould of Potternewton | (Lords) | Lab | (1993-2019) | 0.6% |
| Michael Gove | Surrey Heath | Con | (2005-2010) | 1.2% |
| Michael Gove | Surrey Heath | Con | (2010-2015) | 1.1% |
| Michael Gove | Surrey Heath | Con | (2015-2017) | 0.0% |
| Michael Gove | Surrey Heath | Con | (2017-2019) | 0.5% |
| Michael Gove | Surrey Heath | Con | (2019-2024) | 0.0% |
| Lord Grabiner | (Lords) | Crossbench | (2016-present) | 33.3% |
| Lord Grabiner | (Lords) | Lab | (1999-2015) | 1.6% |
| Lord Grabiner | (Lords) | Non-affiliated | (2015-2016) | 100.0% |
| Lord Grade of Yarmouth | (Lords) | Con | (2011-present) | 1.3% |
| John Grady | Glasgow East | Lab | (2024-present) | 2.8% |
| Patrick Grady | Glasgow North | SNP | (2015-2017) | 0.3% |
| Patrick Grady | Glasgow North | SNP | (2017-2019) | 0.0% |
| Patrick Grady | Glasgow North | SNP | (2019-2024) | 0.2% |
| Graeme Dey | Angus South | SNP | (2011-2016) | n/a |
| Graeme Dey | Angus South | SNP | (2016-2021) | n/a |
| Graeme Dey | Angus South | SNP | (2021-present) | n/a |
| Graeme Pearson | South Scotland | Lab | (2011-2016) | n/a |
| Graham Simpson | Central Scotland | Con | (2016-2021) | n/a |
| Graham Simpson | Central Scotland | Con | (2021-present) | n/a |
| Lord Graham of Edmonton | (Lords) | Lab | (1983-2020) | 1.7% |
| Luke Graham | Ochil and South Perthshire | Con | (2017-2019) | 2.3% |
| Richard Graham | Gloucester | Con | (2010-2015) | 0.3% |
| Richard Graham | Gloucester | Con | (2015-2017) | 0.0% |
| Richard Graham | Gloucester | Con | (2017-2019) | 1.7% |
| Richard Graham | Gloucester | Con | (2019-2024) | 0.7% |
| Tommy Graham | West Renfrewshire | whilst Independent Labour | (1998-2001) | n/a |
| Tommy Graham | West Renfrewshire | whilst Lab | (1997-1998) | 0.0% |
| Mr Bernie Grant | Tottenham | Lab | (1997-2000) | 3.2% |
| Bill Grant | Ayr, Carrick and Cumnock | Con | (2017-2019) | 1.8% |
| Lord Grantchester | (Lords) | Lab | (2003-present) | 1.0% |
| Helen Grant | Maidstone and Malling | Con | (2024-present) | 1.8% |
| Helen Grant | Maidstone and The Weald | Con | (2010-2015) | 0.9% |
| Helen Grant | Maidstone and The Weald | Con | (2015-2017) | 0.0% |
| Helen Grant | Maidstone and The Weald | Con | (2017-2019) | 0.7% |
| Helen Grant | Maidstone and The Weald | Con | (2019-2024) | 0.2% |
| Peter Grant | Glenrothes | SNP | (2015-2017) | 0.0% |
| Peter Grant | Glenrothes | SNP | (2017-2019) | 0.3% |
| Peter Grant | Glenrothes | SNP | (2019-2024) | 0.1% |
| Lord Gray of Contin | (Lords) | Con | (1983-2006) | 2.9% |
| James Gray | North Wiltshire | Con | (1997-2001) | 0.5% |
| James Gray | North Wiltshire | Con | (2001-2005) | 0.5% |
| James Gray | North Wiltshire | Con | (2005-2010) | 1.9% |
| James Gray | North Wiltshire | Con | (2010-2015) | 4.4% |
| James Gray | North Wiltshire | Con | (2015-2017) | 1.3% |
| James Gray | North Wiltshire | Con | (2017-2019) | 3.1% |
| James Gray | North Wiltshire | Con | (2019-2024) | 1.2% |
| Lord Grayling | (Lords) | Con | (2024-present) | 0.0% |
| Chris Grayling | Epsom and Ewell | Con | (2001-2005) | 0.6% |
| Chris Grayling | Epsom and Ewell | Con | (2005-2010) | 0.9% |
| Chris Grayling | Epsom and Ewell | Con | (2010-2015) | 1.2% |
| Chris Grayling | Epsom and Ewell | Con | (2015-2017) | 0.0% |
| Chris Grayling | Epsom and Ewell | Con | (2017-2019) | 1.0% |
| Chris Grayling | Epsom and Ewell | Con | (2019-2024) | 0.7% |
| Neil Gray | Airdrie and Shotts | SNP | (2015-2017) | 0.0% |
| Neil Gray | Airdrie and Shotts | SNP | (2017-2019) | 0.0% |
| Neil Gray | Airdrie and Shotts | SNP | (2019-2021) | 0.0% |
| Tom Greatrex | Rutherglen and Hamilton West | Lab | (2010-2015) | 0.8% |
| Lord Greaves | (Lords) | LDem | (2000-2021) | 4.3% |
| Chris Green | Bolton West | Con | (2015-2017) | 0.2% |
| Chris Green | Bolton West | Con | (2017-2019) | 2.7% |
| Chris Green | Bolton West | Con | (2019-2024) | 3.1% |
| Damian Green | Ashford | Con | (1997-2001) | 0.1% |
| Damian Green | Ashford | Con | (2001-2005) | 0.6% |
| Damian Green | Ashford | Con | (2005-2010) | 0.9% |
| Damian Green | Ashford | Con | (2010-2015) | 0.8% |
| Damian Green | Ashford | Con | (2015-2017) | 0.0% |
| Damian Green | Ashford | Con | (2017-2019) | 3.1% |
| Damian Green | Ashford | Con | (2019-2024) | 2.4% |
| Lord Green of Deddington | (Lords) | Crossbench | (2014-present) | 62.3% |
| Lord Greene of Harrow Weald | (Lords) | Lab | (1975-2004) | n/a |
| Baroness Greenfield | (Lords) | Crossbench | (2001-present) | 31.3% |
| Baroness Greengross | (Lords) | Crossbench | (2000-2022) | 30.2% |
| Lord Greenhalgh | (Lords) | Con | (2020-present) | 0.0% |
| Lord Greenhill of Harrow | (Lords) | Crossbench | (1974-2000) | n/a |
| Lord Green of Hurstpierpoint | (Lords) | Con | (2010-2019) | 6.1% |
| Lord Green of Hurstpierpoint | (Lords) | Crossbench | (2021-present) | 16.5% |
| Lord Green of Hurstpierpoint | (Lords) | Non-affiliated | (2019-2021) | 14.9% |
| Justine Greening | Putney | Con | (2005-2010) | 3.1% |
| Justine Greening | Putney | Con | (2010-2015) | 0.9% |
| Justine Greening | Putney | Con | (2015-2017) | 0.0% |
| Justine Greening | Putney | whilst Con | (2017-2019) | 11.7% |
| Justine Greening | Putney | whilst Independent | (2019-2019) | n/a |
| Kate Green | Stretford and Urmston | Lab | (2010-2015) | 0.2% |
| Kate Green | Stretford and Urmston | Lab | (2015-2017) | 0.9% |
| Kate Green | Stretford and Urmston | Lab | (2017-2019) | 0.0% |
| Kate Green | Stretford and Urmston | Lab | (2019-2022) | 0.0% |
| Mr Matthew Green | Ludlow | LDem | (2001-2005) | 2.5% |
| Sarah Green | Chesham and Amersham | LDem | (2021-2024) | 0.0% |
| Sarah Green | Chesham and Amersham | LDem | (2024-present) | 0.0% |
| Lord Greenway | (Lords) | Crossbench | (1975-present) | 39.8% |
| John Greenway | Ryedale | Con | (1997-2001) | 0.2% |
| John Greenway | Ryedale | Con | (2001-2005) | 0.5% |
| John Greenway | Ryedale | Con | (2005-2010) | 1.4% |
| Lilian Greenwood | Nottingham South | Lab | (2010-2015) | 0.0% |
| Lilian Greenwood | Nottingham South | Lab | (2015-2017) | 1.3% |
| Lilian Greenwood | Nottingham South | Lab | (2017-2019) | 0.3% |
| Lilian Greenwood | Nottingham South | Lab | (2019-2024) | 1.6% |
| Lilian Greenwood | Nottingham South | Lab | (2024-present) | 0.0% |
| Margaret Greenwood | Wirral West | Lab | (2015-2017) | 0.6% |
| Margaret Greenwood | Wirral West | Lab | (2017-2019) | 0.3% |
| Margaret Greenwood | Wirral West | Lab | (2019-2024) | 0.1% |
| Lord Gregson | (Lords) | Lab | (1975-2009) | 0.0% |
| Baroness Grender | (Lords) | LDem | (2013-present) | 0.1% |
| Lord Grenfell | (Lords) | Lab | (2000-2002) | 0.6% |
| Lord Grenfell | (Lords) | Lab | (2010-2014) | n/a |
| Lord Grenfell | (Lords) | Non-affiliated | (2002-2010) | n/a |
| Baroness Grey-Thompson | (Lords) | Crossbench | (2010-present) | 15.3% |
| Dominic Grieve | Beaconsfield | Con | (1997-2001) | 0.3% |
| Dominic Grieve | Beaconsfield | Con | (2001-2005) | 0.5% |
| Dominic Grieve | Beaconsfield | Con | (2005-2010) | 1.3% |
| Dominic Grieve | Beaconsfield | Con | (2010-2015) | 0.1% |
| Dominic Grieve | Beaconsfield | Con | (2015-2017) | 0.8% |
| Dominic Grieve | Beaconsfield | whilst Con | (2017-2019) | 13.6% |
| Dominic Grieve | Beaconsfield | whilst Independent | (2019-2019) | n/a |
| Andrew Griffith | Arundel and South Downs | Con | (2019-2024) | 0.5% |
| Andrew Griffith | Arundel and South Downs | Con | (2024-present) | 0.0% |
| Nia Griffith | Llanelli | Lab | (2005-2010) | 0.5% |
| Nia Griffith | Llanelli | Lab | (2010-2015) | 0.0% |
| Nia Griffith | Llanelli | Lab | (2015-2017) | 0.3% |
| Nia Griffith | Llanelli | Lab | (2017-2019) | 0.5% |
| Nia Griffith | Llanelli | Lab | (2019-2024) | 0.0% |
| Nia Griffith | Llanelli | Lab | (2024-present) | 1.2% |
| Lord Griffiths | (Lords) | Crossbench | (1985-2015) | 0.0% |
| Alison Griffiths | Bognor Regis and Littlehampton | Con | (2024-present) | 0.0% |
| Andrew Griffiths | Burton | Con | (2010-2015) | 0.7% |
| Andrew Griffiths | Burton | Con | (2015-2017) | 0.0% |
| Andrew Griffiths | Burton | Con | (2017-2019) | 2.3% |
| Lord Griffiths of Burry Port | (Lords) | Lab | (2004-present) | 0.8% |
| Lord Griffiths of Fforestfach | (Lords) | Con | (1991-present) | 1.5% |
| Ms Jane Griffiths | Reading East | Lab | (1997-2001) | 1.1% |
| Ms Jane Griffiths | Reading East | Lab | (2001-2005) | 1.8% |
| Nigel Griffiths | Edinburgh South | Lab | (1997-2001) | 0.0% |
| Nigel Griffiths | Edinburgh South | Lab | (2001-2005) | 0.8% |
| Nigel Griffiths | Edinburgh South | Lab | (2005-2010) | 0.7% |
| Mr Win Griffiths | Bridgend | Lab | (1997-2001) | 0.1% |
| Mr Win Griffiths | Bridgend | Lab | (2001-2005) | 1.5% |
| Lord Grimstone of Boscobel | (Lords) | Con | (2020-present) | 0.0% |
| Lord Grocott | (Lords) | Lab | (2001-present) | 0.4% |
| Mr Bruce Grocott | Telford | Lab | (1997-2001) | 0.1% |
| John Grogan | Keighley | Lab | (2017-2019) | 1.0% |
| John Grogan | Selby | Lab | (1997-2001) | 0.6% |
| John Grogan | Selby | Lab | (2001-2005) | 2.4% |
| John Grogan | Selby | Lab | (2005-2010) | 7.0% |
| James Grundy | Leigh | Con | (2019-2024) | 1.0% |
| The Bishop of Guildford | (Lords) | Bishop | (2010-2013) | 16.7% |
| The Bishop of Guildford | (Lords) | Bishop | (1999-2003) | 10.3% |
| The Bishop of Guildford | (Lords) | Bishop | (2021-present) | 0.0% |
| Jonathan Gullis | Stoke-on-Trent North | Con | (2019-2024) | 1.1% |
| Ben Gummer | Ipswich | Con | (2010-2015) | 1.2% |
| Ben Gummer | Ipswich | Con | (2015-2017) | 0.0% |
| John Gummer | Suffolk Coastal | Con | (1997-2001) | 0.9% |
| John Gummer | Suffolk Coastal | Con | (2001-2005) | 1.1% |
| John Gummer | Suffolk Coastal | Con | (2005-2010) | 2.7% |
| Mr John Gunnell | Morley and Rothwell | Lab | (1997-2001) | 0.0% |
| Baroness Gustafsson | (Lords) | Lab | (2024-present) | 0.0% |
| Lord Guthrie of Craigiebank | (Lords) | Crossbench | (2001-2020) | 38.7% |
| Andrew Gwynne | Denton and Reddish | Lab | (2005-2010) | 1.1% |
| Andrew Gwynne | Denton and Reddish | Lab | (2010-2015) | 0.8% |
| Andrew Gwynne | Denton and Reddish | Lab | (2015-2017) | 0.4% |
| Andrew Gwynne | Denton and Reddish | Lab | (2017-2019) | 0.0% |
| Andrew Gwynne | Denton and Reddish | Lab | (2019-2024) | 0.3% |
| Andrew Gwynne | Gorton and Denton | Lab | (2024-present) | 1.2% |
| Sam Gyimah | East Surrey | Con | (2010-2015) | 1.1% |
| Sam Gyimah | East Surrey | Con | (2015-2017) | 0.0% |
| Sam Gyimah | East Surrey | whilst Con | (2017-2019) | 10.2% |
| Sam Gyimah | East Surrey | whilst Independent | (2019-2019) | n/a |
| Lord Habgood | (Lords) | Crossbench | (1995-2011) | 12.5% |
| Amanda Hack | North West Leicestershire | Lab | (2024-present) | 0.0% |
| Lord Hacking | (Lords) | Lab | (2021-present) | 0.6% |
| Lord Hague of Richmond | (Lords) | Con | (2015-present) | 0.9% |
| William Hague | Richmond (Yorks) | Con | (1997-2001) | 0.0% |
| William Hague | Richmond (Yorks) | Con | (2001-2005) | 0.9% |
| William Hague | Richmond (Yorks) | Con | (2005-2010) | 0.7% |
| William Hague | Richmond (Yorks) | Con | (2010-2015) | 1.9% |
| Louise Haigh | Sheffield Heeley | Lab | (2024-present) | 0.0% |
| Louise Haigh | Sheffield, Heeley | Lab | (2015-2017) | 0.6% |
| Louise Haigh | Sheffield, Heeley | Lab | (2017-2019) | 0.0% |
| Louise Haigh | Sheffield, Heeley | Lab | (2019-2024) | 0.0% |
| Viscount Hailsham | (Lords) | Con | (2015-present) | 17.8% |
| Lord Hailsham of Saint Marylebone | (Lords) | Con | (1970-2001) | n/a |
| Lord Hailsham of Saint Marylebone | (Lords) | Non-affiliated | (2001-2001) | n/a |
| Lord Hain | (Lords) | Lab | (2015-present) | 0.2% |
| Peter Hain | Neath | Lab | (1997-2001) | 0.1% |
| Peter Hain | Neath | Lab | (2001-2005) | 0.8% |
| Peter Hain | Neath | Lab | (2005-2010) | 0.4% |
| Peter Hain | Neath | Lab | (2010-2015) | 0.0% |
| Kirstene Hair | Angus | Con | (2017-2019) | 0.9% |
| Baroness Hale of Richmond | (Lords) | Judge | (2004-present) | 0.0% |
| Robert Halfon | Harlow | Con | (2010-2015) | 2.0% |
| Robert Halfon | Harlow | Con | (2015-2017) | 0.0% |
| Robert Halfon | Harlow | Con | (2017-2019) | 2.4% |
| Robert Halfon | Harlow | Con | (2019-2024) | 1.1% |
| Lord Hall of Birkenhead | (Lords) | Crossbench | (2010-present) | 14.4% |
| Baroness Hallett | (Lords) | Crossbench | (2019-present) | 26.3% |
| Luke Hall | Thornbury and Yate | Con | (2015-2017) | 0.0% |
| Luke Hall | Thornbury and Yate | Con | (2017-2019) | 1.2% |
| Luke Hall | Thornbury and Yate | Con | (2019-2024) | 0.4% |
| Mike Hall | Weaver Vale | Lab | (1997-2001) | 0.2% |
| Mike Hall | Weaver Vale | Lab | (2001-2005) | 1.2% |
| Mike Hall | Weaver Vale | Lab | (2005-2010) | 1.1% |
| Patrick Hall | Bedford | Lab | (1997-2001) | 0.3% |
| Patrick Hall | Bedford | Lab | (2001-2005) | 1.2% |
| Patrick Hall | Bedford | Lab | (2005-2010) | 1.6% |
| Sarah Hall | Warrington South | Lab | (2024-present) | 0.0% |
| Lord Hambro | (Lords) | Con | (1994-2002) | 0.0% |
| Lord Hameed | (Lords) | Crossbench | (2007-present) | 36.4% |
| Duncan Hames | Chippenham | LDem | (2010-2015) | 0.8% |
| Sir Archie Hamilton | Epsom and Ewell | Con | (1997-2001) | 0.4% |
| David Hamilton | Midlothian | Lab | (2001-2005) | 4.1% |
| David Hamilton | Midlothian | Lab | (2005-2010) | 3.5% |
| David Hamilton | Midlothian | Lab | (2010-2015) | 0.8% |
| Lord Hamilton of Epsom | (Lords) | Con | (2005-present) | 2.3% |
| Fabian Hamilton | Leeds North East | Lab | (1997-2001) | 0.2% |
| Fabian Hamilton | Leeds North East | Lab | (2001-2005) | 1.4% |
| Fabian Hamilton | Leeds North East | Lab | (2005-2010) | 1.2% |
| Fabian Hamilton | Leeds North East | Lab | (2010-2015) | 0.1% |
| Fabian Hamilton | Leeds North East | Lab | (2015-2017) | 0.4% |
| Fabian Hamilton | Leeds North East | Lab | (2017-2019) | 0.3% |
| Fabian Hamilton | Leeds North East | Lab | (2019-2024) | 0.0% |
| Fabian Hamilton | Leeds North East | Lab | (2024-present) | 0.0% |
| Paulette Hamilton | Birmingham Erdington | Lab | (2024-present) | 0.6% |
| Paulette Hamilton | Birmingham, Erdington | Lab | (2022-2024) | 0.0% |
| Lord Hamlyn | (Lords) | Lab | (1998-2001) | n/a |
| Philip Hammond | Runnymede and Weybridge | Con | (1997-2001) | 0.1% |
| Philip Hammond | Runnymede and Weybridge | Con | (2005-2010) | 0.8% |
| Philip Hammond | Runnymede and Weybridge | Con | (2010-2015) | 0.1% |
| Philip Hammond | Runnymede and Weybridge | Con | (2001-2005) | 0.2% |
| Philip Hammond | Runnymede and Weybridge | Con | (2015-2017) | 0.0% |
| Philip Hammond | Runnymede and Weybridge | whilst Con | (2017-2019) | 0.6% |
| Philip Hammond | Runnymede and Weybridge | whilst Independent | (2019-2019) | n/a |
| Lord Hammond of Runnymede | (Lords) | Con | (2020-present) | 0.0% |
| Stephen Hammond | Wimbledon | Con | (2005-2010) | 0.8% |
| Stephen Hammond | Wimbledon | Con | (2010-2015) | 0.7% |
| Stephen Hammond | Wimbledon | Con | (2015-2017) | 0.0% |
| Stephen Hammond | Wimbledon | whilst Con | (2017-2019) | 4.3% |
| Stephen Hammond | Wimbledon | Con | (2019-2024) | 1.1% |
| Stephen Hammond | Wimbledon | whilst Independent | (2019-2019) | n/a |
| Lord Hampton | (Lords) | Crossbench | (2022-present) | 13.4% |
| Baroness Hamwee | (Lords) | LDem | (1991-present) | 1.2% |
| Matthew Hancock | West Suffolk | Con | (2010-2015) | 0.9% |
| Matthew Hancock | West Suffolk | Con | (2015-2017) | 0.0% |
| Matthew Hancock | West Suffolk | Con | (2017-2019) | 1.0% |
| Matthew Hancock | West Suffolk | whilst Con | (2019-2022) | 0.0% |
| Matthew Hancock | West Suffolk | whilst Independent | (2022-2024) | n/a |
| Mike Hancock | Portsmouth South | whilst Independent | (2013-2015) | n/a |
| Mike Hancock | Portsmouth South | LDem | (1997-2001) | 2.3% |
| Mike Hancock | Portsmouth South | LDem | (2001-2005) | 3.7% |
| Mike Hancock | Portsmouth South | LDem | (2005-2010) | 3.1% |
| Mike Hancock | Portsmouth South | whilst LDem | (2010-2013) | 13.9% |
| Greg Hands | Chelsea and Fulham | Con | (2010-2015) | 0.9% |
| Greg Hands | Chelsea and Fulham | Con | (2015-2017) | 0.0% |
| Greg Hands | Chelsea and Fulham | Con | (2017-2019) | 1.4% |
| Greg Hands | Chelsea and Fulham | Con | (2019-2024) | 0.0% |
| Greg Hands | Hammersmith and Fulham | Con | (2005-2010) | 2.7% |
| Baroness Hanham | (Lords) | Con | (1999-2020) | 1.0% |
| Claire Hanna | Belfast South | SDLP | (2019-2024) | 0.0% |
| Claire Hanna | Belfast South and Mid Down | SDLP | (2024-present) | 0.0% |
| Lord Hannan of Kingsclere | (Lords) | Con | (2021-present) | 1.5% |
| Lord Hannay of Chiswick | (Lords) | Crossbench | (2001-present) | 15.7% |
| Lord Hannett of Everton | (Lords) | Lab | (2024-present) | 0.0% |
| Lord Hanningfield | (Lords) | Con | (1998-2010) | 0.3% |
| Lord Hanningfield | (Lords) | Non-affiliated | (2010-2024) | 100.0% |
| Lord Hanson | (Lords) | Con | (1983-2004) | 0.0% |
| David Hanson | Delyn | Lab | (1997-2001) | 0.1% |
| David Hanson | Delyn | Lab | (2001-2005) | 0.5% |
| David Hanson | Delyn | Lab | (2005-2010) | 0.9% |
| David Hanson | Delyn | Lab | (2010-2015) | 0.3% |
| David Hanson | Delyn | Lab | (2015-2017) | 0.0% |
| David Hanson | Delyn | Lab | (2017-2019) | 0.0% |
| Lord Hanson of Flint | (Lords) | Lab | (2024-present) | 0.0% |
| Neale Hanvey | Kirkcaldy and Cowdenbeath | whilst Alba | (2021-2024) | 0.0% |
| Neale Hanvey | Kirkcaldy and Cowdenbeath | whilst Independent | (2019-2020) | n/a |
| Neale Hanvey | Kirkcaldy and Cowdenbeath | whilst SNP | (2020-2021) | 0.0% |
| Viscount Hanworth | (Lords) | Lab | (2011-present) | 0.5% |
| Hanzala Malik | Glasgow | Lab | (2011-2016) | n/a |
| Lord Hardie | (Lords) | Judge | (1997-present) | 7.9% |
| Monica Harding | Esher and Walton | LDem | (2024-present) | 2.4% |
| Baroness Harding of Winscombe | (Lords) | Con | (2014-present) | 2.6% |
| Emma Hardy | Kingston upon Hull West and Haltemprice | Lab | (2024-present) | 1.3% |
| Emma Hardy | Kingston upon Hull West and Hessle | Lab | (2017-2019) | 0.3% |
| Emma Hardy | Kingston upon Hull West and Hessle | Lab | (2019-2024) | 0.0% |
| Lord Hardy of Wath | (Lords) | Lab | (1997-2003) | 1.3% |
| Lord Harlech | (Lords) | Con | (2021-present) | 0.5% |
| Baroness Harman | (Lords) | Lab | (2024-present) | 0.0% |
| Harriet Harman | Camberwell and Peckham | Lab | (1997-2001) | 0.0% |
| Harriet Harman | Camberwell and Peckham | Lab | (2001-2005) | 0.5% |
| Harriet Harman | Camberwell and Peckham | Lab | (2005-2010) | 0.7% |
| Harriet Harman | Camberwell and Peckham | Lab | (2010-2015) | 0.0% |
| Harriet Harman | Camberwell and Peckham | Lab | (2015-2017) | 1.2% |
| Harriet Harman | Camberwell and Peckham | Lab | (2017-2019) | 0.0% |
| Harriet Harman | Camberwell and Peckham | Lab | (2019-2024) | 0.2% |
| Lord Harmar-Nicholls | (Lords) | Con | (1975-2000) | 0.0% |
| Mark Harper | Forest of Dean | Con | (2005-2010) | 0.8% |
| Mark Harper | Forest of Dean | Con | (2010-2015) | 0.9% |
| Mark Harper | Forest of Dean | Con | (2015-2017) | 0.0% |
| Mark Harper | Forest of Dean | Con | (2017-2019) | 3.2% |
| Mark Harper | Forest of Dean | Con | (2019-2024) | 1.8% |
| Harry Harpham | Sheffield, Brightside and Hillsborough | Lab | (2015-2016) | 0.0% |
| Lord Harries of Pentregarth | (Lords) | Crossbench | (2006-present) | 17.6% |
| Richard Harrington | Watford | Con | (2010-2015) | 1.2% |
| Richard Harrington | Watford | Con | (2015-2017) | 0.0% |
| Richard Harrington | Watford | whilst Con | (2017-2019) | 6.8% |
| Richard Harrington | Watford | whilst Independent | (2019-2019) | n/a |
| Lord Harrington of Watford | (Lords) | Con | (2022-present) | 0.0% |
| Carolyn Harris | Neath and Swansea East | Lab | (2024-present) | 0.0% |
| Carolyn Harris | Swansea East | Lab | (2015-2017) | 0.6% |
| Carolyn Harris | Swansea East | Lab | (2017-2019) | 0.0% |
| Carolyn Harris | Swansea East | Lab | (2019-2024) | 0.0% |
| Evan Harris | Oxford West and Abingdon | LDem | (1997-2001) | 1.7% |
| Evan Harris | Oxford West and Abingdon | LDem | (2001-2005) | 2.2% |
| Evan Harris | Oxford West and Abingdon | LDem | (2005-2010) | 0.4% |
| Lord Harris of Greenwich | (Lords) | LDem | (1974-2001) | 0.7% |
| Lord Harris of Haringey | (Lords) | Lab | (1998-present) | 0.5% |
| Lord Harris of High Cross | (Lords) | Crossbench | (1979-2006) | 16.0% |
| Lord Harrison | (Lords) | Lab | (1999-2022) | 0.6% |
| Trudy Harrison | Copeland | Con | (2017-2017) | 4.2% |
| Trudy Harrison | Copeland | Con | (2017-2019) | 0.7% |
| Trudy Harrison | Copeland | Con | (2019-2024) | 0.2% |
| Lord Harris of Peckham | (Lords) | Con | (1996-present) | 0.7% |
| Rebecca Harris | Castle Point | Con | (2010-2015) | 0.9% |
| Rebecca Harris | Castle Point | Con | (2015-2017) | 0.0% |
| Rebecca Harris | Castle Point | Con | (2017-2019) | 0.2% |
| Rebecca Harris | Castle Point | Con | (2019-2024) | 0.0% |
| Rebecca Harris | Castle Point | Con | (2024-present) | 0.0% |
| Baroness Harris of Richmond | (Lords) | LDem | (1999-present) | 1.7% |
| Tom Harris | Glasgow Cathcart | Lab | (2001-2005) | 1.2% |
| Tom Harris | Glasgow South | Lab | (2005-2010) | 1.2% |
| Tom Harris | Glasgow South | Lab | (2010-2015) | 0.5% |
| Lord Hart of Chilton | (Lords) | Lab | (2004-2017) | 0.1% |
| Sally-Ann Hart | Hastings and Rye | Con | (2019-2024) | 0.9% |
| Simon Hart | Carmarthen West and South Pembrokeshire | Con | (2010-2015) | 0.7% |
| Simon Hart | Carmarthen West and South Pembrokeshire | Con | (2015-2017) | 0.0% |
| Simon Hart | Carmarthen West and South Pembrokeshire | Con | (2017-2019) | 1.2% |
| Simon Hart | Carmarthen West and South Pembrokeshire | Con | (2019-2024) | 0.1% |
| Lord Hartwell | (Lords) | Crossbench | (1968-2001) | n/a |
| Nick Harvey | North Devon | LDem | (1997-2001) | 2.5% |
| Nick Harvey | North Devon | LDem | (2001-2005) | 3.2% |
| Nick Harvey | North Devon | LDem | (2005-2010) | 1.8% |
| Nick Harvey | North Devon | LDem | (2010-2015) | 1.5% |
| Lord Haselhurst | (Lords) | Con | (2018-present) | 1.7% |
| Alan Haselhurst | Saffron Walden | whilst Con | (2005-2005) | n/a |
| Alan Haselhurst | Saffron Walden | Con | (2010-2015) | 0.2% |
| Alan Haselhurst | Saffron Walden | Con | (2015-2017) | 0.0% |
| Alan Haselhurst | Saffron Walden | Deputy Speaker | (1997-2001) | 0.0% |
| Alan Haselhurst | Saffron Walden | Deputy Speaker | (2001-2005) | n/a |
| Alan Haselhurst | Saffron Walden | whilst Deputy Speaker | (2005-2010) | n/a |
| Lord Haskel | (Lords) | Lab | (1993-present) | 0.6% |
| Lord Haskins | (Lords) | Crossbench | (2005-2020) | 33.0% |
| Lord Haskins | (Lords) | Lab | (1998-2005) | 9.3% |
| Lord Haslam | (Lords) | Con | (1990-2002) | 0.0% |
| Lord Hastings of Scarisbrick | (Lords) | Crossbench | (2005-present) | 23.1% |
| Lord Hattersley | (Lords) | Lab | (1997-2017) | 6.3% |
| Lloyd Hatton | South Dorset | Lab | (2024-present) | 0.0% |
| Lord Haughey | (Lords) | Lab | (2013-present) | 0.7% |
| Dai Havard | Merthyr Tydfil and Rhymney | Lab | (2001-2005) | 2.1% |
| Dai Havard | Merthyr Tydfil and Rhymney | Lab | (2005-2010) | 4.9% |
| Dai Havard | Merthyr Tydfil and Rhymney | Lab | (2010-2015) | 0.9% |
| Mr Nick Hawkins | Surrey Heath | Con | (1997-2001) | 0.1% |
| Mr Nick Hawkins | Surrey Heath | Con | (2001-2005) | 0.8% |
| Lord Haworth | (Lords) | Lab | (2004-2023) | 0.7% |
| Lord Hay of Ballyore | (Lords) | DUP | (2015-present) | 1.3% |
| Helen Hayes | Dulwich and West Norwood | Lab | (2015-2017) | 1.4% |
| Helen Hayes | Dulwich and West Norwood | Lab | (2017-2019) | 0.3% |
| Helen Hayes | Dulwich and West Norwood | Lab | (2019-2024) | 0.0% |
| Helen Hayes | Dulwich and West Norwood | Lab | (2024-present) | 1.8% |
| John Hayes | South Holland and The Deepings | Con | (1997-2001) | 0.3% |
| John Hayes | South Holland and The Deepings | Con | (2001-2005) | 0.6% |
| John Hayes | South Holland and The Deepings | Con | (2005-2010) | 0.9% |
| John Hayes | South Holland and The Deepings | Con | (2010-2015) | 0.5% |
| John Hayes | South Holland and The Deepings | Con | (2015-2017) | 0.0% |
| John Hayes | South Holland and The Deepings | Con | (2017-2019) | 1.9% |
| John Hayes | South Holland and The Deepings | Con | (2019-2024) | 1.7% |
| John Hayes | South Holland and The Deepings | Con | (2024-present) | 0.0% |
| Tom Hayes | Bournemouth East | Lab | (2024-present) | 0.0% |
| Lord Hayhoe | (Lords) | Con | (1992-2013) | 1.2% |
| Baroness Hayman | (Lords) | Crossbench | (2011-present) | 12.3% |
| Baroness Hayman | (Lords) | Lab | (1996-2006) | 1.5% |
| Baroness Hayman | (Lords) | Non-affiliated | (2006-2011) | n/a |
| Sue Hayman | Workington | Lab | (2015-2017) | 0.3% |
| Sue Hayman | Workington | Lab | (2017-2019) | 0.3% |
| Baroness Hayman of Ullock | (Lords) | Lab | (2020-present) | 0.2% |
| Baroness Hayter of Kentish Town | (Lords) | Lab | (2010-present) | 0.3% |
| Lord Hayward | (Lords) | Con | (2015-present) | 1.4% |
| Baroness Hazarika | (Lords) | Lab | (2024-present) | 0.0% |
| Claire Hazelgrove | Filton and Bradley Stoke | Lab | (2024-present) | 0.0% |
| Christopher Hazzard | South Down | SF | (2017-2019) | n/a |
| Christopher Hazzard | South Down | SF | (2019-2024) | n/a |
| Christopher Hazzard | South Down | SF | (2024-present) | n/a |
| Oliver Heald | North East Hertfordshire | Con | (1997-2001) | 0.5% |
| Oliver Heald | North East Hertfordshire | Con | (2001-2005) | 0.7% |
| Oliver Heald | North East Hertfordshire | Con | (2005-2010) | 0.6% |
| Oliver Heald | North East Hertfordshire | Con | (2010-2015) | 0.4% |
| Oliver Heald | North East Hertfordshire | Con | (2015-2017) | 0.0% |
| Oliver Heald | North East Hertfordshire | Con | (2017-2019) | 2.4% |
| Oliver Heald | North East Hertfordshire | Con | (2019-2024) | 0.2% |
| Lord Healey | (Lords) | Lab | (1992-2015) | 0.0% |
| John Healey | Rawmarsh and Conisbrough | Lab | (2024-present) | 0.0% |
| John Healey | Wentworth | Lab | (1997-2001) | 0.4% |
| John Healey | Wentworth | Lab | (2001-2005) | 0.4% |
| John Healey | Wentworth | Lab | (2005-2010) | 0.8% |
| John Healey | Wentworth and Dearne | Lab | (2010-2015) | 0.3% |
| John Healey | Wentworth and Dearne | Lab | (2015-2017) | 0.0% |
| John Healey | Wentworth and Dearne | Lab | (2017-2019) | 0.0% |
| John Healey | Wentworth and Dearne | Lab | (2019-2024) | 0.0% |
| Sylvia Heal | Halesowen and Rowley Regis | whilst Deputy Speaker | (2000-2001) | n/a |
| Sylvia Heal | Halesowen and Rowley Regis | Deputy Speaker | (2001-2005) | n/a |
| Sylvia Heal | Halesowen and Rowley Regis | whilst Deputy Speaker | (2005-2010) | n/a |
| Sylvia Heal | Halesowen and Rowley Regis | whilst Lab | (1997-2000) | 0.0% |
| Sylvia Heal | Halesowen and Rowley Regis | whilst Lab | (2005-2005) | n/a |
| Baroness Healy of Primrose Hill | (Lords) | Lab | (2010-present) | 0.4% |
| James Heappey | Wells | Con | (2015-2017) | 0.0% |
| James Heappey | Wells | Con | (2017-2019) | 0.5% |
| James Heappey | Wells | Con | (2019-2024) | 0.0% |
| David Heathcoat-Amory | Wells | Con | (1997-2001) | 0.0% |
| David Heathcoat-Amory | Wells | Con | (2001-2005) | 1.4% |
| David Heathcoat-Amory | Wells | Con | (2005-2010) | 2.1% |
| David Heath | Somerton and Frome | LDem | (1997-2001) | 2.5% |
| David Heath | Somerton and Frome | LDem | (2001-2005) | 2.2% |
| David Heath | Somerton and Frome | LDem | (2005-2010) | 0.5% |
| David Heath | Somerton and Frome | LDem | (2010-2015) | 1.1% |
| Mr Edward Heath | Old Bexley and Sidcup | Con | (1997-2001) | 5.6% |
| Chris Heaton-Harris | Daventry | Con | (2010-2015) | 2.6% |
| Chris Heaton-Harris | Daventry | Con | (2015-2017) | 0.2% |
| Chris Heaton-Harris | Daventry | Con | (2017-2019) | 1.1% |
| Chris Heaton-Harris | Daventry | Con | (2019-2024) | 0.0% |
| Peter Heaton-Jones | North Devon | Con | (2015-2017) | 0.2% |
| Peter Heaton-Jones | North Devon | Con | (2017-2019) | 1.4% |
| Helen Eadie | Cowdenbeath | Lab | (2011-2013) | n/a |
| Helen Eadie | Dunfermline East | Lab | (2003-2007) | 1.0% |
| Helen Eadie | Dunfermline East | Lab | (1999-2003) | 0.5% |
| Helen Eadie | Dunfermline East | Lab | (2007-2011) | 0.5% |
| Baroness Helic | (Lords) | Con | (2014-present) | 1.7% |
| John Hemming | Birmingham, Yardley | LDem | (2005-2010) | 1.6% |
| John Hemming | Birmingham, Yardley | LDem | (2010-2015) | 3.6% |
| Lord Henderson of Brompton | (Lords) | Crossbench | (1984-2000) | n/a |
| Doug Henderson | Newcastle upon Tyne North | Lab | (1997-2001) | 0.2% |
| Doug Henderson | Newcastle upon Tyne North | Lab | (2001-2005) | 1.8% |
| Doug Henderson | Newcastle upon Tyne North | Lab | (2005-2010) | 1.3% |
| Gordon Henderson | Sittingbourne and Sheppey | Con | (2010-2015) | 4.0% |
| Gordon Henderson | Sittingbourne and Sheppey | Con | (2015-2017) | 0.7% |
| Gordon Henderson | Sittingbourne and Sheppey | Con | (2017-2019) | 2.3% |
| Gordon Henderson | Sittingbourne and Sheppey | Con | (2019-2024) | 0.6% |
| Mr Ivan Henderson | Harwich | Lab | (1997-2001) | 0.4% |
| Mr Ivan Henderson | Harwich | Lab | (2001-2005) | 0.9% |
| Mark Hendrick | Preston | Lab | (2000-2001) | 0.0% |
| Mark Hendrick | Preston | Lab | (2001-2005) | 0.8% |
| Mark Hendrick | Preston | Lab | (2005-2010) | 1.1% |
| Mark Hendrick | Preston | Lab | (2010-2015) | 0.4% |
| Mark Hendrick | Preston | Lab | (2015-2017) | 0.0% |
| Mark Hendrick | Preston | Lab | (2017-2019) | 0.6% |
| Mark Hendrick | Preston | Lab | (2019-2024) | 0.0% |
| Mark Hendrick | Preston | Lab | (2024-present) | 2.5% |
| Charles Hendry | Wealden | Con | (2001-2005) | 1.0% |
| Charles Hendry | Wealden | Con | (2005-2010) | 0.6% |
| Charles Hendry | Wealden | Con | (2010-2015) | 1.1% |
| Drew Hendry | Inverness, Nairn, Badenoch and Strathspey | SNP | (2015-2017) | 0.0% |
| Drew Hendry | Inverness, Nairn, Badenoch and Strathspey | SNP | (2017-2019) | 0.0% |
| Drew Hendry | Inverness, Nairn, Badenoch and Strathspey | SNP | (2019-2024) | 0.0% |
| Lord Hendy | (Lords) | Lab | (2019-present) | 0.4% |
| Lord Hendy of Richmond Hill | (Lords) | Crossbench | (2022-present) | 34.8% |
| Baroness Henig | (Lords) | Lab | (2004-2024) | 0.7% |
| Lord Henley | (Lords) | Con | (1977-present) | 1.1% |
| Lord Hennessy of Nympsfield | (Lords) | Crossbench | (2010-present) | 15.7% |
| Henry McLeish | Central Fife | Lab | (1999-2003) | 0.8% |
| Darren Henry | Broxtowe | Con | (2019-2024) | 0.4% |
| Stephen Hepburn | Jarrow | Lab | (1997-2001) | 0.1% |
| Stephen Hepburn | Jarrow | Lab | (2001-2005) | 0.8% |
| Stephen Hepburn | Jarrow | Lab | (2005-2010) | 0.2% |
| Stephen Hepburn | Jarrow | Lab | (2010-2015) | 0.7% |
| Stephen Hepburn | Jarrow | Lab | (2015-2017) | 0.7% |
| Stephen Hepburn | Jarrow | Lab | (2017-2019) | 9.1% |
| John Heppell | Nottingham East | Lab | (1997-2001) | 0.4% |
| John Heppell | Nottingham East | Lab | (2001-2005) | 0.8% |
| John Heppell | Nottingham East | Lab | (2005-2010) | 0.7% |
| Nick Herbert | Arundel and South Downs | Con | (2005-2010) | 1.9% |
| Nick Herbert | Arundel and South Downs | Con | (2010-2015) | 0.9% |
| Nick Herbert | Arundel and South Downs | Con | (2015-2017) | 0.0% |
| Nick Herbert | Arundel and South Downs | Con | (2017-2019) | 3.1% |
| Lord Herbert of South Downs | (Lords) | Con | (2020-present) | 0.8% |
| The Bishop of Hereford | (Lords) | Bishop | (1997-2003) | 1.8% |
| The Bishop of Hereford | (Lords) | Bishop | (2009-2013) | 2.1% |
| The Bishop of Hereford | (Lords) | Bishop | (2023-present) | 0.0% |
| Lord Hermer | (Lords) | Lab | (2024-present) | 0.0% |
| Sylvia Hermon | North Down | Independent | (2010-2015) | n/a |
| Sylvia Hermon | North Down | Independent | (2015-2017) | n/a |
| Sylvia Hermon | North Down | Independent | (2017-2019) | n/a |
| Sylvia Hermon | North Down | UUP | (2001-2005) | 6.7% |
| Sylvia Hermon | North Down | UUP | (2005-2010) | 0.0% |
| Lord Heseltine | (Lords) | Con | (2001-2019) | 29.2% |
| Lord Heseltine | (Lords) | Non-affiliated | (2019-present) | 6.7% |
| Mr Michael Heseltine | Henley | Con | (1997-2001) | 1.6% |
| Stephen Hesford | Wirral West | Lab | (1997-2001) | 0.0% |
| Stephen Hesford | Wirral West | Lab | (2001-2005) | 1.3% |
| Stephen Hesford | Wirral West | Lab | (2005-2010) | 0.7% |
| Patricia Hewitt | Leicester West | Lab | (1997-2001) | 0.4% |
| Patricia Hewitt | Leicester West | Lab | (2001-2005) | 0.6% |
| Patricia Hewitt | Leicester West | Lab | (2005-2010) | 0.6% |
| David Heyes | Ashton-under-Lyne | Lab | (2001-2005) | 1.2% |
| David Heyes | Ashton-under-Lyne | Lab | (2005-2010) | 1.3% |
| David Heyes | Ashton-under-Lyne | Lab | (2010-2015) | 0.6% |
| Baroness Heyhoe Flint | (Lords) | Con | (2011-2017) | 0.6% |
| Pippa Heylings | South Cambridgeshire | LDem | (2024-present) | 0.0% |
| Antony Higginbotham | Burnley | Con | (2019-2024) | 0.1% |
| Lord Higgins | (Lords) | Con | (1997-2019) | 2.1% |
| Lord Hill-Norton | (Lords) | Crossbench | (1979-2004) | n/a |
| Meg Hillier | Hackney South and Shoreditch | Lab | (2010-2015) | 0.4% |
| Meg Hillier | Hackney South and Shoreditch | Lab | (2005-2010) | 1.9% |
| Meg Hillier | Hackney South and Shoreditch | Lab | (2015-2017) | 1.9% |
| Meg Hillier | Hackney South and Shoreditch | Lab | (2017-2019) | 0.0% |
| Meg Hillier | Hackney South and Shoreditch | Lab | (2019-2024) | 0.1% |
| Meg Hillier | Hackney South and Shoreditch | Lab | (2024-present) | 1.8% |
| Julie Hilling | Bolton West | Lab | (2010-2015) | 0.4% |
| Keith Hill | Streatham | Lab | (1997-2001) | 0.7% |
| Keith Hill | Streatham | Lab | (2001-2005) | 0.2% |
| Keith Hill | Streatham | Lab | (2005-2010) | 0.6% |
| Mike Hill | Hartlepool | Lab | (2017-2019) | 1.3% |
| Mike Hill | Hartlepool | Lab | (2019-2021) | 0.5% |
| Lord Hill of Oareford | (Lords) | Con | (2010-present) | 0.5% |
| Baroness Hilton of Eggardon | (Lords) | Lab | (1991-2021) | 1.0% |
| Chris Hinchliff | North East Hertfordshire | Lab | (2024-present) | 0.5% |
| Mr David Hinchliffe | Wakefield | Lab | (1997-2001) | 1.3% |
| Mr David Hinchliffe | Wakefield | Lab | (2001-2005) | 4.0% |
| Jonathan Hinder | Pendle and Clitheroe | Lab | (2024-present) | 0.6% |
| Damian Hinds | East Hampshire | Con | (2010-2015) | 1.3% |
| Damian Hinds | East Hampshire | Con | (2015-2017) | 0.0% |
| Damian Hinds | East Hampshire | Con | (2017-2019) | 0.5% |
| Damian Hinds | East Hampshire | Con | (2019-2024) | 0.0% |
| Damian Hinds | East Hampshire | Con | (2024-present) | 1.3% |
| Lord Hintze | (Lords) | Con | (2022-present) | 0.0% |
| Simon Hoare | North Dorset | Con | (2015-2017) | 0.0% |
| Simon Hoare | North Dorset | Con | (2017-2019) | 2.4% |
| Simon Hoare | North Dorset | Con | (2019-2024) | 4.2% |
| Simon Hoare | North Dorset | Con | (2024-present) | 3.3% |
| Mark Hoban | Fareham | Con | (2001-2005) | 1.2% |
| Mark Hoban | Fareham | Con | (2005-2010) | 0.8% |
| Mark Hoban | Fareham | Con | (2010-2015) | 0.6% |
| Wera Hobhouse | Bath | LDem | (2017-2019) | 0.0% |
| Wera Hobhouse | Bath | LDem | (2019-2024) | 0.0% |
| Wera Hobhouse | Bath | LDem | (2024-present) | 0.0% |
| Lord Hobhouse of Woodborough | (Lords) | Crossbench | (1998-2004) | n/a |
| Baroness Hodge of Barking | (Lords) | Lab | (2024-present) | 0.0% |
| Margaret Hodge | Barking | Lab | (1997-2001) | 0.4% |
| Margaret Hodge | Barking | Lab | (2001-2005) | 1.0% |
| Margaret Hodge | Barking | Lab | (2005-2010) | 0.6% |
| Margaret Hodge | Barking | Lab | (2010-2015) | 0.1% |
| Margaret Hodge | Barking | Lab | (2015-2017) | 2.6% |
| Margaret Hodge | Barking | Lab | (2017-2019) | 0.4% |
| Margaret Hodge | Barking | Lab | (2019-2024) | 0.2% |
| Baroness Hodgson of Abinger | (Lords) | Con | (2013-present) | 2.0% |
| Lord Hodgson of Astley Abbotts | (Lords) | Con | (2000-present) | 2.7% |
| Sharon Hodgson | Gateshead East and Washington West | Lab | (2005-2010) | 0.1% |
| Sharon Hodgson | Washington and Gateshead South | Lab | (2024-present) | 0.0% |
| Sharon Hodgson | Washington and Sunderland West | Lab | (2010-2015) | 0.1% |
| Sharon Hodgson | Washington and Sunderland West | Lab | (2015-2017) | 0.3% |
| Sharon Hodgson | Washington and Sunderland West | Lab | (2017-2019) | 0.0% |
| Sharon Hodgson | Washington and Sunderland West | Lab | (2019-2024) | 0.0% |
| Baroness Hoey | (Lords) | Non-affiliated | (2020-present) | 62.9% |
| Kate Hoey | Vauxhall | Lab | (1997-2001) | 3.2% |
| Kate Hoey | Vauxhall | Lab | (2001-2005) | 17.4% |
| Kate Hoey | Vauxhall | Lab | (2005-2010) | 25.2% |
| Kate Hoey | Vauxhall | Lab | (2010-2015) | 5.6% |
| Kate Hoey | Vauxhall | Lab | (2015-2017) | 10.0% |
| Kate Hoey | Vauxhall | Lab | (2017-2019) | 46.6% |
| Lord Hoffmann | (Lords) | Crossbench | (1995-present) | 13.6% |
| Lord Hogan-Howe | (Lords) | Crossbench | (2017-present) | 57.6% |
| Baroness Hogg | (Lords) | Con | (1995-2010) | 2.4% |
| Baroness Hogg | (Lords) | Crossbench | (2010-present) | 62.9% |
| Lord Hogg of Cumbernauld | (Lords) | Lab | (1997-2008) | 1.9% |
| Douglas Hogg | Sleaford and North Hykeham | Con | (1997-2001) | 2.0% |
| Douglas Hogg | Sleaford and North Hykeham | Con | (2001-2005) | 3.1% |
| Douglas Hogg | Sleaford and North Hykeham | Con | (2005-2010) | 3.3% |
| Richard Holden | Basildon and Billericay | Con | (2024-present) | 0.0% |
| Richard Holden | North West Durham | Con | (2019-2024) | 0.2% |
| Lord Holderness | (Lords) | Con | (1979-2002) | 0.0% |
| Kate Hollern | Blackburn | Lab | (2015-2017) | 0.7% |
| Kate Hollern | Blackburn | Lab | (2017-2019) | 0.5% |
| Kate Hollern | Blackburn | Lab | (2019-2024) | 0.1% |
| Lord Hollick | (Lords) | Lab | (1991-present) | 1.6% |
| George Hollingbery | Meon Valley | Con | (2010-2015) | 1.0% |
| George Hollingbery | Meon Valley | Con | (2015-2017) | 0.2% |
| George Hollingbery | Meon Valley | Con | (2017-2019) | 0.7% |
| Kevin Hollinrake | Thirsk and Malton | Con | (2015-2017) | 0.2% |
| Kevin Hollinrake | Thirsk and Malton | Con | (2017-2019) | 2.3% |
| Kevin Hollinrake | Thirsk and Malton | Con | (2019-2024) | 0.8% |
| Kevin Hollinrake | Thirsk and Malton | Con | (2024-present) | 0.8% |
| Baroness Hollins | (Lords) | Crossbench | (2010-present) | 17.2% |
| Baroness Hollis of Heigham | (Lords) | Lab | (1990-2018) | 0.3% |
| Philip Hollobone | Kettering | Con | (2005-2010) | 4.3% |
| Philip Hollobone | Kettering | Con | (2010-2015) | 19.9% |
| Philip Hollobone | Kettering | Con | (2015-2017) | 7.0% |
| Philip Hollobone | Kettering | Con | (2017-2019) | 8.1% |
| Philip Hollobone | Kettering | Con | (2019-2024) | 7.0% |
| Adam Holloway | Gravesham | Con | (2005-2010) | 0.6% |
| Adam Holloway | Gravesham | Con | (2010-2015) | 3.0% |
| Adam Holloway | Gravesham | Con | (2015-2017) | 0.9% |
| Adam Holloway | Gravesham | Con | (2017-2019) | 3.9% |
| Adam Holloway | Gravesham | Con | (2019-2024) | 1.7% |
| Lord Holme of Cheltenham | (Lords) | LDem | (1990-2008) | 1.9% |
| Paul Holmes | Chesterfield | LDem | (2001-2005) | 2.6% |
| Paul Holmes | Chesterfield | LDem | (2005-2010) | 0.9% |
| Paul Holmes | Eastleigh | Con | (2019-2024) | 0.4% |
| Paul Holmes | Hamble Valley | Con | (2024-present) | 0.0% |
| Lord Holmes of Richmond | (Lords) | Con | (2013-2019) | 1.6% |
| Lord Holmes of Richmond | (Lords) | Con | (2020-present) | 0.7% |
| Lord Holmes of Richmond | (Lords) | Non-affiliated | (2019-2020) | 75.0% |
| The Earl of Home | (Lords) | Con | (1995-2022) | 0.0% |
| John Home Robertson | East Lothian | Lab | (1997-2001) | 0.4% |
| Jimmy Hood | Clydesdale | Lab | (1997-2001) | 1.3% |
| Jimmy Hood | Clydesdale | Lab | (2001-2005) | 2.6% |
| Jimmy Hood | Lanark and Hamilton East | Lab | (2005-2010) | 0.7% |
| Jimmy Hood | Lanark and Hamilton East | Lab | (2010-2015) | 0.8% |
| Geoff Hoon | Ashfield | Lab | (1997-2001) | 0.0% |
| Geoff Hoon | Ashfield | Lab | (2001-2005) | 0.2% |
| Geoff Hoon | Ashfield | Lab | (2005-2010) | 0.4% |
| Baroness Hooper | (Lords) | Con | (1985-present) | 2.1% |
| Lord Hooson | (Lords) | LDem | (1979-2012) | 3.5% |
| Lord Hope of Craighead | (Lords) | Judge | (1995-present) | 2.5% |
| Phil Hope | Corby | Lab | (1997-2001) | 0.1% |
| Phil Hope | Corby | Lab | (2001-2005) | 0.6% |
| Phil Hope | Corby | Lab | (2005-2010) | 0.0% |
| Lord Hope of Thornes | (Lords) | Crossbench | (2005-2015) | n/a |
| Kelvin Hopkins | Luton North | whilst Independent | (2017-2019) | n/a |
| Kelvin Hopkins | Luton North | Lab | (1997-2001) | 4.3% |
| Kelvin Hopkins | Luton North | Lab | (2001-2005) | 10.8% |
| Kelvin Hopkins | Luton North | Lab | (2005-2010) | 14.4% |
| Kelvin Hopkins | Luton North | Lab | (2010-2015) | 4.9% |
| Kelvin Hopkins | Luton North | Lab | (2015-2017) | 6.5% |
| Kelvin Hopkins | Luton North | whilst Lab | (2017-2017) | 3.7% |
| Kris Hopkins | Keighley | Con | (2010-2015) | 1.1% |
| Kris Hopkins | Keighley | Con | (2015-2017) | 0.0% |
| Rachel Hopkins | Luton South | Lab | (2019-2024) | 0.0% |
| Rachel Hopkins | Luton South and South Bedfordshire | Lab | (2024-present) | 0.5% |
| Lord Horam | (Lords) | Con | (2013-present) | 2.0% |
| John Horam | Orpington | Con | (1997-2001) | 0.0% |
| John Horam | Orpington | Con | (2001-2005) | 1.4% |
| John Horam | Orpington | Con | (2005-2010) | 1.0% |
| Martin Horwood | Cheltenham | LDem | (2005-2010) | 1.5% |
| Martin Horwood | Cheltenham | LDem | (2010-2015) | 5.0% |
| Stewart Hosie | Dundee East | SNP | (2005-2010) | 0.6% |
| Stewart Hosie | Dundee East | SNP | (2010-2015) | 0.4% |
| Stewart Hosie | Dundee East | SNP | (2015-2017) | 0.4% |
| Stewart Hosie | Dundee East | SNP | (2017-2019) | 0.0% |
| Stewart Hosie | Dundee East | SNP | (2019-2024) | 0.0% |
| Lord Houchen of High Leven | (Lords) | Con | (2023-present) | 0.0% |
| Lord Houghton of Richmond | (Lords) | Crossbench | (2017-present) | 25.0% |
| Lord Howard of Lympne | (Lords) | Con | (2010-present) | 1.7% |
| Michael Howard | Folkestone and Hythe | Con | (1997-2001) | 0.3% |
| Michael Howard | Folkestone and Hythe | Con | (2001-2005) | 0.4% |
| Michael Howard | Folkestone and Hythe | Con | (2005-2010) | 2.5% |
| Lord Howard of Rising | (Lords) | Con | (2004-present) | 2.2% |
| Mr Alan Howarth | Newport East | Lab | (1997-2001) | 0.3% |
| Mr Alan Howarth | Newport East | Lab | (2001-2005) | 0.6% |
| Baroness Howarth of Breckland | (Lords) | Crossbench | (2001-present) | 31.5% |
| David Howarth | Cambridge | LDem | (2005-2010) | 1.0% |
| George Howarth | Knowsley | Lab | (2010-2015) | 1.3% |
| George Howarth | Knowsley | Lab | (2015-2017) | 1.1% |
| George Howarth | Knowsley | Lab | (2017-2019) | 0.9% |
| George Howarth | Knowsley | Lab | (2019-2024) | 0.0% |
| George Howarth | Knowsley North and Sefton East | Lab | (1997-2001) | 0.1% |
| George Howarth | Knowsley North and Sefton East | Lab | (2001-2005) | 1.6% |
| George Howarth | Knowsley North and Sefton East | Lab | (2005-2010) | 0.9% |
| Gerald Howarth | Aldershot | Con | (1997-2001) | 1.3% |
| Gerald Howarth | Aldershot | Con | (2001-2005) | 1.0% |
| Gerald Howarth | Aldershot | Con | (2005-2010) | 1.0% |
| Gerald Howarth | Aldershot | Con | (2010-2015) | 2.9% |
| Gerald Howarth | Aldershot | Con | (2015-2017) | 1.1% |
| Lord Howarth of Newport | (Lords) | Lab | (2005-present) | 1.1% |
| Earl Howe | (Lords) | Con | (1984-present) | 0.6% |
| Lord Howe of Aberavon | (Lords) | Con | (1992-2015) | 3.7% |
| Baroness Howe of Idlicote | (Lords) | Crossbench | (2001-2020) | 14.9% |
| Lord Howell of Guildford | (Lords) | Con | (1997-present) | 0.6% |
| John Howell | Henley | Con | (2008-2010) | 0.0% |
| John Howell | Henley | Con | (2010-2015) | 0.3% |
| John Howell | Henley | Con | (2015-2017) | 0.3% |
| John Howell | Henley | Con | (2019-2024) | 0.2% |
| John Howell | Henley | Con | (2017-2019) | 1.2% |
| Paul Howell | Sedgefield | Con | (2019-2024) | 0.0% |
| Kim Howells | Pontypridd | Lab | (1997-2001) | 0.0% |
| Kim Howells | Pontypridd | Lab | (2001-2005) | 0.6% |
| Kim Howells | Pontypridd | Lab | (2005-2010) | 0.6% |
| Baroness Howells of St Davids | (Lords) | Lab | (1999-2019) | 0.9% |
| Lord Howie of Troon | (Lords) | Lab | (1978-2018) | 4.2% |
| Ben Howlett | Bath | Con | (2015-2017) | 0.5% |
| Lord Hoyle | (Lords) | Lab | (1997-2023) | 1.5% |
| Lindsay Hoyle | Chorley | Lab | (1997-2001) | 0.7% |
| Lindsay Hoyle | Chorley | Lab | (2001-2005) | 3.0% |
| Lindsay Hoyle | Chorley | Lab | (2005-2010) | 2.4% |
| Lindsay Hoyle | Chorley | Lab | (2010-2015) | 0.0% |
| Lindsay Hoyle | Chorley | Lab | (2015-2017) | n/a |
| Lindsay Hoyle | Chorley | Lab | (2017-2019) | n/a |
| Lindsay Hoyle | Chorley | Speaker | (2019-2024) | n/a |
| Lindsay Hoyle | Chorley | Speaker | (2024-present) | n/a |
| Nigel Huddleston | Droitwich and Evesham | Con | (2024-present) | 0.0% |
| Nigel Huddleston | Mid Worcestershire | Con | (2015-2017) | 0.2% |
| Nigel Huddleston | Mid Worcestershire | Con | (2017-2019) | 0.7% |
| Nigel Huddleston | Mid Worcestershire | Con | (2019-2024) | 0.1% |
| Neil Hudson | Epping Forest | Con | (2024-present) | 0.7% |
| Neil Hudson | Penrith and The Border | Con | (2019-2024) | 1.4% |
| Hugh O'Donnell | Central Scotland | LDem | (2007-2011) | 1.3% |
| Hugh Henry | Paisley South | Lab | (2003-2007) | 0.0% |
| Hugh Henry | Paisley South | Lab | (1999-2003) | 0.3% |
| Hugh Henry | Paisley South | Lab | (2007-2011) | 0.2% |
| Hugh Henry | Renfrewshire South | Lab | (2011-2016) | n/a |
| Lord Hughes | (Lords) | Lab | (1961-1999) | n/a |
| Beverley Hughes | Stretford and Urmston | Lab | (1997-2001) | 0.2% |
| Beverley Hughes | Stretford and Urmston | Lab | (2001-2005) | 0.4% |
| Beverley Hughes | Stretford and Urmston | Lab | (2005-2010) | 0.2% |
| Claire Hughes | Bangor Aberconwy | Lab | (2024-present) | 0.0% |
| Dáire Hughes | Newry and Armagh | SF | (2024-present) | n/a |
| Eddie Hughes | Walsall North | Con | (2017-2019) | 3.0% |
| Eddie Hughes | Walsall North | Con | (2019-2024) | 0.8% |
| Mr Kevin Hughes | Doncaster North | Lab | (1997-2001) | 0.0% |
| Mr Kevin Hughes | Doncaster North | Lab | (2001-2005) | 1.5% |
| Simon Hughes | Bermondsey and Old Southwark | LDem | (2010-2015) | 1.9% |
| Simon Hughes | North Southwark and Bermondsey | LDem | (1997-2001) | 0.6% |
| Simon Hughes | North Southwark and Bermondsey | LDem | (2001-2005) | 1.8% |
| Simon Hughes | North Southwark and Bermondsey | LDem | (2005-2010) | 1.3% |
| Baroness Hughes of Stretford | (Lords) | Lab | (2010-present) | 1.0% |
| Lord Hughes of Woodside | (Lords) | Lab | (1997-2022) | 0.7% |
| Christopher Huhne | Eastleigh | LDem | (2005-2010) | 0.6% |
| Christopher Huhne | Eastleigh | LDem | (2010-2013) | 0.2% |
| Joan Humble | Blackpool North and Fleetwood | Lab | (1997-2001) | 0.1% |
| Joan Humble | Blackpool North and Fleetwood | Lab | (2001-2005) | 0.9% |
| Joan Humble | Blackpool North and Fleetwood | Lab | (2005-2010) | 1.3% |
| Alison Hume | Scarborough and Whitby | Lab | (2024-present) | 0.0% |
| Mr John Hume | Foyle | SDLP | (1997-2001) | 0.0% |
| Mr John Hume | Foyle | SDLP | (2001-2005) | 0.0% |
| Baroness Humphreys | (Lords) | LDem | (2013-present) | 0.3% |
| Humza Yousaf | Glasgow | SNP | (2011-2016) | n/a |
| Humza Yousaf | Glasgow Pollok | SNP | (2016-2021) | n/a |
| Humza Yousaf | Glasgow Pollok | SNP | (2021-present) | n/a |
| Baroness Hunt of Bethnal Green | (Lords) | Crossbench | (2019-present) | 7.9% |
| Lord Hunt of Chesterton | (Lords) | Lab | (2000-2021) | 1.2% |
| Mr Andrew Hunter | Basingstoke | Con | (1997-2001) | 3.0% |
| Mr Andrew Hunter | Basingstoke | whilst Con | (2001-2002) | 0.6% |
| Mr Andrew Hunter | Basingstoke | whilst DUP | (2004-2005) | 1.4% |
| Mr Andrew Hunter | Basingstoke | whilst Independent Conservative | (2002-2004) | n/a |
| Mark Hunter | Cheadle | LDem | (2005-2010) | 1.7% |
| Mark Hunter | Cheadle | LDem | (2010-2015) | 0.8% |
| Jane Hunt | Loughborough | Con | (2019-2024) | 0.3% |
| Jeremy Hunt | Godalming and Ash | Con | (2024-present) | 2.2% |
| Jeremy Hunt | South West Surrey | Con | (2005-2010) | 2.4% |
| Jeremy Hunt | South West Surrey | Con | (2010-2015) | 0.4% |
| Jeremy Hunt | South West Surrey | Con | (2015-2017) | 0.0% |
| Jeremy Hunt | South West Surrey | Con | (2017-2019) | 0.3% |
| Jeremy Hunt | South West Surrey | Con | (2019-2024) | 1.7% |
| Lord Hunt of Kings Heath | (Lords) | Lab | (1997-present) | 0.7% |
| Lord Hunt of Tanworth | (Lords) | Crossbench | (1980-2008) | 25.0% |
| Tom Hunt | Ipswich | Con | (2019-2024) | 1.3% |
| Tristram Hunt | Stoke-on-Trent Central | Lab | (2010-2015) | 0.0% |
| Tristram Hunt | Stoke-on-Trent Central | Lab | (2015-2017) | 0.8% |
| Lord Hunt of Wirral | (Lords) | Con | (1997-present) | 0.7% |
| Julian Huppert | Cambridge | LDem | (2010-2015) | 3.5% |
| Rupa Huq | Ealing Central and Acton | Lab | (2015-2017) | 0.9% |
| Rupa Huq | Ealing Central and Acton | Lab | (2017-2019) | 0.3% |
| Rupa Huq | Ealing Central and Acton | Lab | (2019-2024) | 0.1% |
| Rupa Huq | Ealing Central and Acton | Lab | (2024-present) | 1.9% |
| Nick Hurd | Ruislip - Northwood | Con | (2005-2010) | 1.3% |
| Nick Hurd | Ruislip, Northwood and Pinner | Con | (2010-2015) | 0.1% |
| Nick Hurd | Ruislip, Northwood and Pinner | Con | (2015-2017) | 0.0% |
| Nick Hurd | Ruislip, Northwood and Pinner | Con | (2017-2019) | 1.0% |
| Lord Hurd of Westwell | (Lords) | Con | (1997-2016) | 5.0% |
| Patrick Hurley | Southport | Lab | (2024-present) | 1.6% |
| Mr Alan Hurst | Braintree | Lab | (1997-2001) | 1.4% |
| Mr Alan Hurst | Braintree | Lab | (2001-2005) | 3.5% |
| Lord Hussain | (Lords) | LDem | (2011-2015) | 4.7% |
| Lord Hussain | (Lords) | LDem | (2015-present) | 0.5% |
| Lord Hussain | (Lords) | Non-affiliated | (2015-2015) | n/a |
| Adnan Hussain | Blackburn | Independent | (2024-present) | n/a |
| Imran Hussain | Bradford East | whilst Independent | (2024-present) | n/a |
| Imran Hussain | Bradford East | Lab | (2015-2017) | 0.6% |
| Imran Hussain | Bradford East | Lab | (2017-2019) | 0.3% |
| Imran Hussain | Bradford East | Lab | (2019-2024) | 0.0% |
| Imran Hussain | Bradford East | whilst Lab | (2024-2024) | 25.0% |
| Baroness Hussein-Ece | (Lords) | LDem | (2010-present) | 1.2% |
| Lord Hussey of North Bradley | (Lords) | Crossbench | (1996-2006) | 19.6% |
| Lord Hutchinson of Lullington | (Lords) | LDem | (1978-2011) | 2.6% |
| Lord Hutton | (Lords) | Crossbench | (1997-2018) | 8.3% |
| Lord Hutton of Furness | (Lords) | Lab | (2010-present) | 0.4% |
| John Hutton | Barrow and Furness | Lab | (1997-2001) | 0.2% |
| John Hutton | Barrow and Furness | Lab | (2001-2005) | 0.7% |
| John Hutton | Barrow and Furness | Lab | (2005-2010) | 0.8% |
| Lord Hylton | (Lords) | Crossbench | (1967-2023) | 21.3% |
| Baroness Hylton-Foster | (Lords) | Crossbench | (1965-2002) | 16.1% |
| Iain Gray | East Lothian | Lab | (2011-2016) | n/a |
| Iain Gray | East Lothian | Lab | (2007-2011) | 0.4% |
| Iain Gray | East Lothian | Lab | (2016-2021) | n/a |
| Iain Gray | Edinburgh Pentlands | Lab | (1999-2003) | 0.4% |
| Iain Smith | North East Fife | LDem | (2003-2007) | 0.9% |
| Iain Smith | North East Fife | LDem | (1999-2003) | 1.3% |
| Iain Smith | North East Fife | LDem | (2007-2011) | 1.2% |
| Ian Welsh | Ayr | Lab | (1999-1999) | 2.7% |
| Ian McKee | Lothians | SNP | (2007-2011) | 0.0% |
| Ian Jenkins | Tweeddale, Ettrick and Lauderdale | LDem | (1999-2003) | 1.4% |
| Brian Iddon | Bolton South East | Lab | (1997-2001) | 1.8% |
| Brian Iddon | Bolton South East | Lab | (2001-2005) | 3.8% |
| Brian Iddon | Bolton South East | Lab | (2005-2010) | 2.1% |
| Eric Illsley | Barnsley Central | Lab | (1997-2001) | 1.2% |
| Eric Illsley | Barnsley Central | Lab | (2001-2005) | 3.3% |
| Eric Illsley | Barnsley Central | Lab | (2005-2010) | 1.2% |
| Eric Illsley | Barnsley Central | Lab | (2010-2011) | 1.9% |
| Lord Imbert | (Lords) | Crossbench | (1999-2017) | 37.2% |
| Lord Inge | (Lords) | Crossbench | (1997-2016) | 26.7% |
| Leigh Ingham | Stafford | Lab | (2024-present) | 1.5% |
| Lord Inglewood | (Lords) | Con | (1989-2018) | 3.6% |
| Lord Inglewood | (Lords) | Non-affiliated | (2018-present) | 21.8% |
| Adam Ingram | East Kilbride | Lab | (1997-2001) | 0.0% |
| Adam Ingram | East Kilbride | Lab | (2001-2005) | 1.2% |
| Adam Ingram | East Kilbride, Strathaven and Lesmahagow | Lab | (2005-2010) | 0.7% |
| Lord Ingrow | (Lords) | Other | (1983-2002) | n/a |
| Irene Oldfather | Cunninghame South | Lab | (2003-2007) | 0.7% |
| Irene Oldfather | Cunninghame South | Lab | (1999-2003) | 0.4% |
| Irene Oldfather | Cunninghame South | Lab | (2007-2011) | 0.4% |
| Irene McGugan | North East Scotland | SNP | (1999-2003) | 1.6% |
| Natasha Irons | Croydon East | Lab | (2024-present) | 0.0% |
| Huw Irranca-Davies | Ogmore | Lab | (2002-2005) | 1.3% |
| Huw Irranca-Davies | Ogmore | Lab | (2005-2010) | 1.0% |
| Huw Irranca-Davies | Ogmore | Lab | (2010-2015) | 0.1% |
| Huw Irranca-Davies | Ogmore | Lab | (2015-2016) | 0.0% |
| Lord Irvine of Lairg | (Lords) | Lab | (1987-present) | 1.2% |
| Lord Islwyn | (Lords) | Lab | (1997-2003) | 4.4% |
| Ivan McKee | Glasgow Provan | SNP | (2016-2021) | n/a |
| Ivan McKee | Glasgow Provan | SNP | (2021-present) | n/a |
| Rt Hon Jack McConnell | Motherwell and Wishaw | Lab | (1999-2003) | 0.5% |
| Rt Hon Jack McConnell | Motherwell and Wishaw | Lab | (2003-2007) | 0.1% |
| Lord Jack Wilson [Missing last name for 80353] | Motherwell and Wishaw | Lab | (2007-2011) | 0.6% |
| Alister Jack | Dumfries and Galloway | Con | (2017-2019) | 0.7% |
| Alister Jack | Dumfries and Galloway | Con | (2019-2024) | 0.0% |
| Jackie Dunbar | Aberdeen Donside | SNP | (2021-present) | n/a |
| Jackie Baillie | Dumbarton | Lab | (2011-2016) | n/a |
| Jackie Baillie | Dumbarton | Lab | (2003-2007) | 0.5% |
| Jackie Baillie | Dumbarton | Lab | (1999-2003) | 0.4% |
| Jackie Baillie | Dumbarton | Lab | (2007-2011) | 0.0% |
| Jackie Baillie | Dumbarton | Lab | (2016-2021) | n/a |
| Jackie Baillie | Dumbarton | Lab | (2021-present) | n/a |
| Michael Jack | Fylde | Con | (1997-2001) | 0.1% |
| Michael Jack | Fylde | Con | (2001-2005) | 0.9% |
| Michael Jack | Fylde | Con | (2005-2010) | 1.7% |
| Jackson Carlaw | Eastwood | Con | (2016-2021) | n/a |
| Jackson Carlaw | Eastwood | Con | (2021-present) | n/a |
| Jackson Carlaw | West of Scotland | Con | (2007-2011) | 0.0% |
| Jackson Carlaw | West Scotland | Con | (2011-2016) | n/a |
| Glenda Jackson | Hampstead and Highgate | Lab | (1997-2001) | 0.1% |
| Glenda Jackson | Hampstead and Highgate | Lab | (2001-2005) | 8.2% |
| Glenda Jackson | Hampstead and Highgate | Lab | (2005-2010) | 9.0% |
| Glenda Jackson | Hampstead and Kilburn | Lab | (2010-2015) | 0.9% |
| Mrs Helen Jackson | Sheffield, Hillsborough | Lab | (1997-2001) | 0.4% |
| Mrs Helen Jackson | Sheffield, Hillsborough | Lab | (2001-2005) | 0.5% |
| Lord Jackson of Peterborough | (Lords) | Con | (2022-present) | 0.4% |
| Robert Jackson | Wantage | Con | (1997-2001) | 0.6% |
| Robert Jackson | Wantage | whilst Con | (2001-2005) | 1.8% |
| Robert Jackson | Wantage | whilst Lab | (2005-2005) | 0.0% |
| Stewart Jackson | Peterborough | Con | (2005-2010) | 1.1% |
| Stewart Jackson | Peterborough | Con | (2010-2015) | 4.6% |
| Stewart Jackson | Peterborough | Con | (2015-2017) | 1.3% |
| Lord Jacobs | (Lords) | LDem | (1997-2008) | 0.4% |
| Lord Jacobs | (Lords) | Non-affiliated | (2008-2014) | n/a |
| James Kelly | Glasgow | Lab | (2016-2021) | n/a |
| James Dornan | Glasgow Cathcart | SNP | (2011-2016) | n/a |
| James Dornan | Glasgow Cathcart | SNP | (2016-2021) | n/a |
| James Dornan | Glasgow Cathcart | SNP | (2021-present) | n/a |
| James Kelly | Glasgow Rutherglen | Lab | (2007-2011) | 0.0% |
| Lord James [Missing last name for 80026] | Lothians | Con | (2003-2007) | 4.0% |
| Lord James [Missing last name for 80261] | Lothians | Con | (1999-2003) | 0.3% |
| James Kelly | Rutherglen | Lab | (2011-2016) | n/a |
| Lord James of Blackheath | (Lords) | Con | (2006-present) | 2.0% |
| Baroness James of Holland Park | (Lords) | Con | (1991-2014) | 0.5% |
| Margot James | Stourbridge | Con | (2010-2015) | 1.0% |
| Margot James | Stourbridge | Con | (2015-2017) | 0.0% |
| Margot James | Stourbridge | whilst Con | (2017-2019) | 3.7% |
| Margot James | Stourbridge | whilst Independent | (2019-2019) | n/a |
| Sally Jameson | Doncaster Central | Lab | (2024-present) | 1.6% |
| Siân James | Swansea East | Lab | (2010-2015) | 0.5% |
| Siân James | Swansea East | Lab | (2005-2010) | 1.0% |
| Jamie Stone | Caithness, Sutherland and Easter Ross | LDem | (2003-2007) | 0.5% |
| Jamie Stone | Caithness, Sutherland and Easter Ross | LDem | (1999-2003) | 2.8% |
| Jamie Stone | Caithness, Sutherland and Easter Ross | LDem | (2007-2011) | 1.9% |
| Jamie Hepburn | Central Scotland | SNP | (2007-2011) | 0.2% |
| Jamie Hepburn | Cumbernauld and Kilsyth | SNP | (2011-2016) | n/a |
| Jamie Hepburn | Cumbernauld and Kilsyth | SNP | (2016-2021) | n/a |
| Jamie Hepburn | Cumbernauld and Kilsyth | SNP | (2021-present) | n/a |
| Jamie McGrigor | Highlands and Islands | Con | (2011-2016) | n/a |
| Jamie McGrigor | Highlands and Islands | Con | (2003-2007) | 1.6% |
| Jamie McGrigor | Highlands and Islands | Con | (1999-2003) | 0.9% |
| Jamie McGrigor | Highlands and Islands | Con | (2007-2011) | 0.5% |
| Jamie Halcro Johnston | Highlands and Islands | Con | (2017-2021) | n/a |
| Jamie Halcro Johnston | Highlands and Islands | Con | (2021-present) | n/a |
| Jamie Greene | West Scotland | Con | (2016-2021) | n/a |
| Jamie Greene | West Scotland | Con | (2021-present) | n/a |
| Lord Jamieson | (Lords) | Con | (2024-present) | 0.0% |
| Cathy Jamieson | Kilmarnock and Loudoun | Lab | (2010-2015) | 0.0% |
| Mr David Jamieson | Plymouth, Devonport | Lab | (1997-2001) | 0.5% |
| Mr David Jamieson | Plymouth, Devonport | Lab | (2001-2005) | 0.2% |
| Janis Hughes | Glasgow Rutherglen | Lab | (2003-2007) | 0.2% |
| Janis Hughes | Glasgow Rutherglen | Lab | (1999-2003) | 0.4% |
| Baroness Janke | (Lords) | LDem | (2014-present) | 0.4% |
| Lord Janner of Braunstone | (Lords) | Lab | (1997-2015) | 0.4% |
| Lord Janvrin | (Lords) | Crossbench | (2007-present) | 23.4% |
| Christine Jardine | Edinburgh West | LDem | (2017-2019) | 0.0% |
| Christine Jardine | Edinburgh West | LDem | (2019-2024) | 0.1% |
| Christine Jardine | Edinburgh West | LDem | (2024-present) | 0.0% |
| Dan Jarvis | Barnsley Central | Lab | (2011-2015) | 0.1% |
| Dan Jarvis | Barnsley Central | Lab | (2015-2017) | 0.6% |
| Dan Jarvis | Barnsley Central | Lab | (2017-2019) | 0.9% |
| Dan Jarvis | Barnsley Central | Lab | (2019-2024) | 0.0% |
| Dan Jarvis | Barnsley North | Lab | (2024-present) | 0.0% |
| Liz Jarvis | Eastleigh | LDem | (2024-present) | 0.0% |
| Lord Jauncey of Tullichettle | (Lords) | Crossbench | (1988-2007) | 15.0% |
| Sajid Javid | Bromsgrove | Con | (2010-2015) | 0.7% |
| Sajid Javid | Bromsgrove | Con | (2015-2017) | 0.0% |
| Sajid Javid | Bromsgrove | Con | (2017-2019) | 0.5% |
| Sajid Javid | Bromsgrove | Con | (2019-2024) | 0.0% |
| Ranil Jayawardena | North East Hampshire | Con | (2015-2017) | 0.3% |
| Ranil Jayawardena | North East Hampshire | Con | (2017-2019) | 3.1% |
| Ranil Jayawardena | North East Hampshire | Con | (2019-2024) | 0.3% |
| Lord Jay of Ewelme | (Lords) | Crossbench | (2006-present) | 30.0% |
| Jayne Baxter | Mid Scotland and Fife | Lab | (2012-2016) | n/a |
| Baroness Jay of Paddington | (Lords) | Lab | (1992-present) | 0.7% |
| Jean Urquhart | Highlands and Islands | whilst Independent | (2012-2016) | n/a |
| Jean Urquhart | Highlands and Islands | whilst SNP | (2011-2012) | n/a |
| Dr Jean Turner | Strathkelvin and Bearsden | Independent | (2003-2007) | n/a |
| Jeane Freeman | Carrick, Cumnock and Doon Valley | SNP | (2016-2021) | n/a |
| Baroness Jeger | (Lords) | Lab | (1979-2007) | 4.3% |
| Earl Jellicoe | (Lords) | Con | (1935-2007) | 3.1% |
| Bernard Jenkin | Harwich and North Essex | Con | (2010-2015) | 6.6% |
| Bernard Jenkin | Harwich and North Essex | Con | (2015-2017) | 1.6% |
| Bernard Jenkin | Harwich and North Essex | Con | (2017-2019) | 2.8% |
| Bernard Jenkin | Harwich and North Essex | Con | (2019-2024) | 1.0% |
| Bernard Jenkin | Harwich and North Essex | Con | (2024-present) | 0.0% |
| Bernard Jenkin | North Essex | Con | (1997-2001) | 0.8% |
| Bernard Jenkin | North Essex | Con | (2001-2005) | 0.1% |
| Bernard Jenkin | North Essex | Con | (2005-2010) | 2.7% |
| Baroness Jenkin of Kennington | (Lords) | Con | (2011-present) | 0.4% |
| Lord Jenkin of Roding | (Lords) | Con | (1987-2015) | 1.3% |
| Brian Jenkins | Tamworth | Lab | (1997-2001) | 0.4% |
| Brian Jenkins | Tamworth | Lab | (2001-2005) | 1.4% |
| Brian Jenkins | Tamworth | Lab | (2005-2010) | 1.2% |
| Lord Jenkins of Hillhead | (Lords) | LDem | (1987-2003) | 0.0% |
| Mark Jenkinson | Workington | Con | (2019-2024) | 1.3% |
| Lord Jenkins of Putney | (Lords) | Lab | (1981-2004) | 2.3% |
| Andrea Jenkyns | Morley and Outwood | Con | (2015-2017) | 0.0% |
| Andrea Jenkyns | Morley and Outwood | Con | (2017-2019) | 2.9% |
| Andrea Jenkyns | Morley and Outwood | Con | (2019-2024) | 1.0% |
| Jenni Minto | Argyll and Bute | SNP | (2021-present) | n/a |
| Jenny Gilruth | Mid Fife and Glenrothes | SNP | (2016-2021) | n/a |
| Jenny Gilruth | Mid Fife and Glenrothes | SNP | (2021-present) | n/a |
| Jenny Marra | North East Scotland | Lab | (2011-2016) | n/a |
| Jenny Marra | North East Scotland | Lab | (2016-2021) | n/a |
| Robert Jenrick | Newark | Con | (2014-2015) | 2.8% |
| Robert Jenrick | Newark | Con | (2015-2017) | 0.5% |
| Robert Jenrick | Newark | Con | (2017-2019) | 0.7% |
| Robert Jenrick | Newark | Con | (2019-2024) | 1.0% |
| Robert Jenrick | Newark | Con | (2024-present) | 0.0% |
| Jeremy Balfour | Lothian | Con | (2016-2021) | n/a |
| Jeremy Balfour | Lothian | Con | (2021-present) | n/a |
| Jeremy Purvis | Tweeddale, Ettrick and Lauderdale | LDem | (2003-2007) | 0.5% |
| Jeremy Purvis | Tweeddale, Ettrick and Lauderdale | LDem | (2007-2011) | 0.2% |
| Terry Jermy | South West Norfolk | Lab | (2024-present) | 0.6% |
| Jim Mather | Argyll and Bute | SNP | (2007-2011) | 0.3% |
| Jim Tolson | Dunfermline West | LDem | (2007-2011) | 0.7% |
| Jim Eadie | Edinburgh Southern | SNP | (2011-2016) | n/a |
| Jim Mather | Highlands and Islands | SNP | (2003-2007) | 0.9% |
| Jim Wallace | Orkney Islands | LDem | (2003-2007) | 0.2% |
| Jim Wallace | Orkney Islands | LDem | (1999-2003) | 1.0% |
| Jim Fairlie | Perthshire South and Kinross-shire | SNP | (2021-present) | n/a |
| Jim Hume | South of Scotland | LDem | (2007-2011) | 0.3% |
| Jim Hume | South Scotland | LDem | (2011-2016) | n/a |
| Joan McAlpine | South Scotland | SNP | (2011-2016) | n/a |
| Joan McAlpine | South Scotland | SNP | (2016-2021) | n/a |
| Joe FitzPatrick | Dundee City West | SNP | (2011-2016) | n/a |
| Joe FitzPatrick | Dundee City West | SNP | (2016-2021) | n/a |
| Joe FitzPatrick | Dundee City West | SNP | (2021-present) | n/a |
| Joe FitzPatrick | Dundee West | SNP | (2007-2011) | 0.3% |
| Lord Joffe | (Lords) | Crossbench | (2000-2007) | 35.5% |
| Lord Joffe | (Lords) | Lab | (2007-2015) | n/a |
| Adam Jogee | Newcastle-under-Lyme | Lab | (2024-present) | 1.8% |
| Johann Lamont | Glasgow | Lab | (2016-2021) | n/a |
| Johann Lamont | Glasgow Pollok | Lab | (2011-2016) | n/a |
| Johann Lamont | Glasgow Pollok | Lab | (2003-2007) | 1.2% |
| Johann Lamont | Glasgow Pollok | Lab | (1999-2003) | 0.2% |
| Johann Lamont | Glasgow Pollok | Lab | (2007-2011) | 0.4% |
| John Scott | Ayr | Con | (2011-2016) | n/a |
| John Scott | Ayr | Con | (2003-2007) | 0.9% |
| John Scott | Ayr | Con | (2000-2003) | 0.2% |
| John Scott | Ayr | Con | (2007-2011) | 0.0% |
| John Scott | Ayr | Con | (2016-2021) | n/a |
| John Wilson | Central Scotland | whilst Independent | (2014-2016) | n/a |
| John Wilson | Central Scotland | whilst SNP | (2011-2014) | n/a |
| John Wilson | Central Scotland | SNP | (2007-2011) | 0.2% |
| John Swinburne | Central Scotland | SSCUP | (2003-2007) | 0.0% |
| John McAllion | Dundee East | Lab | (1999-2003) | 6.7% |
| John Home Robertson | East Lothian | Lab | (2003-2007) | 0.5% |
| John Home Robertson | East Lothian | Lab | (1999-2003) | 2.1% |
| John Lamont | Ettrick, Roxburgh and Berwickshire | Con | (2011-2016) | n/a |
| John Lamont | Ettrick, Roxburgh and Berwickshire | Con | (2016-2017) | n/a |
| John Mason | Glasgow Shettleston | SNP | (2011-2016) | n/a |
| John Mason | Glasgow Shettleston | SNP | (2016-2021) | n/a |
| John Mason | Glasgow Shettleston | SNP | (2021-present) | n/a |
| John Finnie | Highlands and Islands | Green | (2016-2021) | n/a |
| John Finnie | Highlands and Islands | whilst Independent | (2012-2016) | n/a |
| John Finnie | Highlands and Islands | whilst SNP | (2011-2012) | n/a |
| John Park | Mid Scotland and Fife | Lab | (2011-2012) | n/a |
| John Park | Mid Scotland and Fife | Lab | (2007-2011) | 0.2% |
| John Pentland | Motherwell and Wishaw | Lab | (2011-2016) | n/a |
| John Swinney | North Tayside | SNP | (2003-2007) | 0.7% |
| John Swinney | North Tayside | SNP | (1999-2003) | 1.4% |
| John Swinney | North Tayside | SNP | (2007-2011) | 0.0% |
| John Swinney | Perthshire North | SNP | (2011-2016) | n/a |
| John Swinney | Perthshire North | SNP | (2016-2021) | n/a |
| John Swinney | Perthshire North | SNP | (2021-present) | n/a |
| John Farquhar Munro | Ross, Skye and Inverness West | LDem | (2003-2007) | 4.5% |
| John Farquhar Munro | Ross, Skye and Inverness West | LDem | (1999-2003) | 9.3% |
| John Farquhar Munro | Ross, Skye and Inverness West | LDem | (2007-2011) | 2.3% |
| John Lamont | Roxburgh and Berwickshire | Con | (2007-2011) | 0.0% |
| John Young | West of Scotland | Con | (1999-2003) | 6.0% |
| Sir Geoffrey Johnson Smith | Wealden | Con | (1997-2001) | 1.0% |
| Alan Johnson | Kingston upon Hull West and Hessle | Lab | (2001-2005) | 0.0% |
| Alan Johnson | Kingston upon Hull West and Hessle | Lab | (2005-2010) | 0.8% |
| Alan Johnson | Kingston upon Hull West and Hessle | Lab | (2010-2015) | 0.3% |
| Alan Johnson | Kingston upon Hull West and Hessle | Lab | (1997-2001) | 0.5% |
| Alan Johnson | Kingston upon Hull West and Hessle | Lab | (2015-2017) | 0.8% |
| Boris Johnson | Henley | Con | (2001-2005) | 0.5% |
| Boris Johnson | Henley | Con | (2005-2008) | 0.6% |
| Boris Johnson | Uxbridge and South Ruislip | Con | (2015-2017) | 0.0% |
| Boris Johnson | Uxbridge and South Ruislip | Con | (2017-2019) | 1.9% |
| Boris Johnson | Uxbridge and South Ruislip | Con | (2019-2023) | 0.4% |
| Dr Caroline Johnson | Sleaford and North Hykeham | Con | (2016-2017) | 0.0% |
| Dr Caroline Johnson | Sleaford and North Hykeham | Con | (2017-2019) | 0.5% |
| Dr Caroline Johnson | Sleaford and North Hykeham | Con | (2019-2024) | 0.5% |
| Dr Caroline Johnson | Sleaford and North Hykeham | Con | (2024-present) | 1.6% |
| Diana R. Johnson | Kingston upon Hull North | Lab | (2005-2010) | 0.3% |
| Diana R. Johnson | Kingston upon Hull North | Lab | (2010-2015) | 0.0% |
| Diana R. Johnson | Kingston upon Hull North | Lab | (2015-2017) | 0.0% |
| Diana R. Johnson | Kingston upon Hull North | Lab | (2017-2019) | 0.0% |
| Diana R. Johnson | Kingston upon Hull North | Lab | (2019-2024) | 0.0% |
| Diana R. Johnson | Kingston upon Hull North and Cottingham | Lab | (2024-present) | 0.0% |
| Gareth Johnson | Dartford | Con | (2010-2015) | 0.8% |
| Gareth Johnson | Dartford | Con | (2015-2017) | 0.0% |
| Gareth Johnson | Dartford | Con | (2017-2019) | 2.1% |
| Gareth Johnson | Dartford | Con | (2019-2024) | 0.2% |
| Jo Johnson | Orpington | Con | (2010-2015) | 1.2% |
| Jo Johnson | Orpington | Con | (2015-2017) | 0.2% |
| Jo Johnson | Orpington | Con | (2017-2019) | 3.9% |
| Kim Johnson | Liverpool Riverside | Lab | (2024-present) | 0.0% |
| Kim Johnson | Liverpool, Riverside | Lab | (2019-2024) | 0.1% |
| Lord Johnson of Lainston | (Lords) | Con | (2022-present) | 0.0% |
| Lord Johnson of Marylebone | (Lords) | Con | (2020-present) | 0.0% |
| Miss Melanie Johnson | Welwyn Hatfield | Lab | (1997-2001) | 0.3% |
| Miss Melanie Johnson | Welwyn Hatfield | Lab | (2001-2005) | 0.3% |
| David Johnston | Wantage | Con | (2019-2024) | 0.2% |
| Lord Johnston of Rockport | (Lords) | Con | (1987-2002) | 0.0% |
| Baroness Jolly | (Lords) | LDem | (2011-2024) | 0.4% |
| Lord Jones | (Lords) | Lab | (2001-present) | 0.7% |
| Andrew Jones | Harrogate and Knaresborough | Con | (2010-2015) | 0.7% |
| Andrew Jones | Harrogate and Knaresborough | Con | (2015-2017) | 0.0% |
| Andrew Jones | Harrogate and Knaresborough | Con | (2017-2019) | 0.7% |
| Andrew Jones | Harrogate and Knaresborough | Con | (2019-2024) | 0.2% |
| Mr Barry Jones | Alyn and Deeside | Lab | (1997-2001) | 0.3% |
| Lord Jones of Birmingham | (Lords) | Crossbench | (2008-2020) | 43.1% |
| Lord Jones of Birmingham | (Lords) | Lab | (2007-2008) | 0.0% |
| Lord Jones of Cheltenham | (Lords) | LDem | (2005-2022) | 0.6% |
| Clive Jones | Wokingham | LDem | (2024-present) | 0.0% |
| Darren Jones | Bristol North West | Lab | (2017-2019) | 0.3% |
| Darren Jones | Bristol North West | Lab | (2019-2024) | 0.0% |
| Darren Jones | Bristol North West | Lab | (2024-present) | 1.8% |
| David Jones | Clwyd West | Con | (2005-2010) | 0.9% |
| David Jones | Clwyd West | Con | (2010-2015) | 0.4% |
| David Jones | Clwyd West | Con | (2015-2017) | 1.0% |
| David Jones | Clwyd West | Con | (2017-2019) | 3.7% |
| David Jones | Clwyd West | Con | (2019-2024) | 2.5% |
| Fay Jones | Brecon and Radnorshire | Con | (2019-2024) | 0.3% |
| Fiona Jones | Newark | Lab | (1997-1999) | 0.0% |
| Fiona Jones | Newark | Lab | (1999-2001) | 0.9% |
| Gerald Jones | Merthyr Tydfil and Aberdare | Lab | (2024-present) | 0.0% |
| Gerald Jones | Merthyr Tydfil and Rhymney | Lab | (2015-2017) | 0.3% |
| Gerald Jones | Merthyr Tydfil and Rhymney | Lab | (2017-2019) | 0.0% |
| Gerald Jones | Merthyr Tydfil and Rhymney | Lab | (2019-2024) | 0.1% |
| Graham Jones | Hyndburn | Lab | (2010-2015) | 0.6% |
| Graham Jones | Hyndburn | Lab | (2015-2017) | 0.7% |
| Graham Jones | Hyndburn | Lab | (2017-2019) | 0.0% |
| Helen Jones | Warrington North | Lab | (1997-2001) | 0.3% |
| Helen Jones | Warrington North | Lab | (2001-2005) | 2.1% |
| Helen Jones | Warrington North | Lab | (2005-2010) | 2.7% |
| Helen Jones | Warrington North | Lab | (2010-2015) | 0.6% |
| Helen Jones | Warrington North | Lab | (2015-2017) | 1.1% |
| Helen Jones | Warrington North | Lab | (2017-2019) | 2.6% |
| Mr Ieuan Wyn Jones | Ynys Môn | PC | (1997-2001) | 1.9% |
| Ms Jenny Jones | Wolverhampton South West | Lab | (1997-2001) | 1.7% |
| Mr Jon Owen Jones | Cardiff Central | Lab | (1997-2001) | 1.1% |
| Mr Jon Owen Jones | Cardiff Central | Lab | (2001-2005) | 2.9% |
| Kevan Jones | North Durham | Lab | (2001-2005) | 1.2% |
| Kevan Jones | North Durham | Lab | (2005-2010) | 0.9% |
| Kevan Jones | North Durham | Lab | (2010-2015) | 0.9% |
| Kevan Jones | North Durham | Lab | (2015-2017) | 1.2% |
| Kevan Jones | North Durham | Lab | (2017-2019) | 1.8% |
| Kevan Jones | North Durham | Lab | (2019-2024) | 0.1% |
| Lillian Jones | Kilmarnock and Loudoun | Lab | (2024-present) | 2.3% |
| Louise Jones | North East Derbyshire | Lab | (2024-present) | 0.0% |
| Lynne Jones | Birmingham, Selly Oak | Lab | (1997-2001) | 5.4% |
| Lynne Jones | Birmingham, Selly Oak | Lab | (2001-2005) | 14.0% |
| Lynne Jones | Birmingham, Selly Oak | Lab | (2005-2010) | 16.4% |
| Marcus Jones | Nuneaton | Con | (2010-2015) | 1.2% |
| Marcus Jones | Nuneaton | Con | (2015-2017) | 0.0% |
| Marcus Jones | Nuneaton | Con | (2017-2019) | 0.5% |
| Marcus Jones | Nuneaton | Con | (2019-2024) | 0.0% |
| Martyn Jones | Clwyd South | Lab | (1997-2001) | 0.4% |
| Martyn Jones | Clwyd South | Lab | (2001-2005) | 2.0% |
| Martyn Jones | Clwyd South | Lab | (2005-2010) | 0.9% |
| Baroness Jones of Moulsecoomb | (Lords) | Green | (2013-present) | 0.0% |
| Mr Nigel Jones | Cheltenham | LDem | (1997-2001) | 1.4% |
| Mr Nigel Jones | Cheltenham | LDem | (2001-2005) | 1.5% |
| Ruth Jones | Newport West | Lab | (2019-2019) | 0.0% |
| Ruth Jones | Newport West | Lab | (2019-2024) | 0.0% |
| Ruth Jones | Newport West and Islwyn | Lab | (2024-present) | 1.7% |
| Sarah Jones | Croydon Central | Lab | (2017-2019) | 0.3% |
| Sarah Jones | Croydon Central | Lab | (2019-2024) | 0.0% |
| Sarah Jones | Croydon West | Lab | (2024-present) | 0.0% |
| Susan Elan Jones | Clwyd South | Lab | (2010-2015) | 0.4% |
| Susan Elan Jones | Clwyd South | Lab | (2015-2017) | 0.6% |
| Susan Elan Jones | Clwyd South | Lab | (2017-2019) | 0.0% |
| Baroness Jones of Whitchurch | (Lords) | Lab | (2006-present) | 0.5% |
| Lord Jopling | (Lords) | Con | (1997-present) | 1.1% |
| Lincoln Jopp | Spelthorne | Con | (2024-present) | 0.0% |
| Lord Jordan | (Lords) | Lab | (2000-present) | 1.3% |
| Gurinder Josan | Smethwick | Lab | (2024-present) | 2.2% |
| Sojan Joseph | Ashford | Lab | (2024-present) | 1.6% |
| Baroness Jowell | (Lords) | Lab | (2015-2018) | 0.0% |
| Tessa Jowell | Dulwich and West Norwood | Lab | (2001-2005) | 0.0% |
| Tessa Jowell | Dulwich and West Norwood | Lab | (2005-2010) | 0.5% |
| Tessa Jowell | Dulwich and West Norwood | Lab | (1997-2001) | 0.0% |
| Tessa Jowell | Dulwich and West Norwood | Lab | (2010-2015) | 0.0% |
| Eric Joyce | Falkirk | Lab | (2005-2010) | 0.8% |
| Eric Joyce | Falkirk | Lab | (2010-2015) | 0.7% |
| Eric Joyce | Falkirk West | Lab | (2000-2001) | 0.0% |
| Eric Joyce | Falkirk West | Lab | (2001-2005) | 0.3% |
| Lord Judd | (Lords) | Lab | (1991-2021) | 3.4% |
| Lord Judge | (Lords) | Judge | (2008-2023) | 5.7% |
| Simon Jupp | East Devon | Con | (2019-2024) | 0.4% |
| Warinder Juss | Wolverhampton West | Lab | (2024-present) | 0.0% |
| Lord Kakkar | (Lords) | Crossbench | (2010-present) | 43.6% |
| Lord Kalms | (Lords) | Con | (2004-2009) | 0.0% |
| Lord Kalms | (Lords) | Non-affiliated | (2009-2024) | 70.2% |
| Lord Kamall | (Lords) | Con | (2021-present) | 0.9% |
| Chris Kane | Stirling and Strathallan | Lab | (2024-present) | 0.0% |
| Mike Kane | Wythenshawe and Sale East | Lab | (2014-2015) | 0.5% |
| Mike Kane | Wythenshawe and Sale East | Lab | (2015-2017) | 0.3% |
| Mike Kane | Wythenshawe and Sale East | Lab | (2017-2019) | 0.6% |
| Mike Kane | Wythenshawe and Sale East | Lab | (2019-2024) | 0.3% |
| Mike Kane | Wythenshawe and Sale East | Lab | (2024-present) | 2.9% |
| Karen Whitefield | Airdrie and Shotts | Lab | (2003-2007) | 1.4% |
| Karen Whitefield | Airdrie and Shotts | Lab | (1999-2003) | 0.2% |
| Karen Whitefield | Airdrie and Shotts | Lab | (2007-2011) | 0.7% |
| Karen Adam | Banffshire and Buchan Coast | SNP | (2021-present) | n/a |
| Karen Gillon | Clydesdale | Lab | (2003-2007) | 1.5% |
| Karen Gillon | Clydesdale | Lab | (1999-2003) | 1.3% |
| Karen Gillon | Clydesdale | Lab | (2007-2011) | 0.0% |
| Kate Maclean | Dundee West | Lab | (2003-2007) | 2.6% |
| Kate Maclean | Dundee West | Lab | (1999-2003) | 1.2% |
| Kate Forbes | Skye, Lochaber and Badenoch | SNP | (2016-2021) | n/a |
| Kate Forbes | Skye, Lochaber and Badenoch | SNP | (2021-present) | n/a |
| Baroness Katy [Missing last name for 80714] | West Scotland | Lab | (2021-present) | n/a |
| Gerald Kaufman | Manchester, Gorton | Lab | (1997-2001) | 0.1% |
| Gerald Kaufman | Manchester, Gorton | Lab | (2001-2005) | 0.9% |
| Gerald Kaufman | Manchester, Gorton | Lab | (2005-2010) | 1.7% |
| Gerald Kaufman | Manchester, Gorton | Lab | (2010-2015) | 1.1% |
| Gerald Kaufman | Manchester, Gorton | Lab | (2015-2017) | 0.0% |
| Kaukab Stewart | Glasgow Kelvin | SNP | (2021-present) | n/a |
| Satvir Kaur | Southampton Test | Lab | (2024-present) | 1.5% |
| Daniel Kawczynski | Shrewsbury and Atcham | Con | (2005-2010) | 1.5% |
| Daniel Kawczynski | Shrewsbury and Atcham | Con | (2010-2015) | 1.7% |
| Daniel Kawczynski | Shrewsbury and Atcham | Con | (2015-2017) | 0.0% |
| Daniel Kawczynski | Shrewsbury and Atcham | Con | (2017-2019) | 2.3% |
| Daniel Kawczynski | Shrewsbury and Atcham | Con | (2019-2024) | 0.4% |
| Kay Ullrich | West of Scotland | SNP | (1999-2003) | 1.7% |
| Alicia Kearns | Rutland and Melton | Con | (2019-2024) | 1.4% |
| Alicia Kearns | Rutland and Stamford | Con | (2024-present) | 3.4% |
| Sally Keeble | Northampton North | Lab | (1997-2001) | 0.2% |
| Sally Keeble | Northampton North | Lab | (2001-2005) | 1.0% |
| Sally Keeble | Northampton North | Lab | (2005-2010) | 0.7% |
| Gillian Keegan | Chichester | Con | (2017-2019) | 1.4% |
| Gillian Keegan | Chichester | Con | (2019-2024) | 0.0% |
| Baroness Keeley | (Lords) | Lab | (2024-present) | 1.2% |
| Barbara Keeley | Worsley | Lab | (2005-2010) | 0.5% |
| Barbara Keeley | Worsley and Eccles South | Lab | (2010-2015) | 0.1% |
| Barbara Keeley | Worsley and Eccles South | Lab | (2015-2017) | 0.3% |
| Barbara Keeley | Worsley and Eccles South | Lab | (2017-2019) | 0.3% |
| Barbara Keeley | Worsley and Eccles South | Lab | (2019-2024) | 0.0% |
| Alan Keen | Feltham and Heston | Lab | (1997-2001) | 0.9% |
| Alan Keen | Feltham and Heston | Lab | (2001-2005) | 1.3% |
| Alan Keen | Feltham and Heston | Lab | (2005-2010) | 0.5% |
| Alan Keen | Feltham and Heston | Lab | (2010-2011) | 0.0% |
| Ann Keen | Brentford and Isleworth | Lab | (1997-2001) | 0.1% |
| Ann Keen | Brentford and Isleworth | Lab | (2001-2005) | 0.6% |
| Ann Keen | Brentford and Isleworth | Lab | (2005-2010) | 0.4% |
| Lord Keen of Elie | (Lords) | Con | (2015-present) | 0.2% |
| Paul Keetch | Hereford | LDem | (1997-2001) | 1.6% |
| Paul Keetch | Hereford | LDem | (2001-2005) | 2.7% |
| Paul Keetch | Hereford | LDem | (2005-2010) | 0.5% |
| Keith Brown | Clackmannanshire and Dunblane | SNP | (2011-2016) | n/a |
| Keith Brown | Clackmannanshire and Dunblane | SNP | (2016-2021) | n/a |
| Keith Brown | Clackmannanshire and Dunblane | SNP | (2021-present) | n/a |
| Keith Harding | Mid Scotland and Fife | Con | (1999-2003) | 0.9% |
| Keith Raffan | Mid Scotland and Fife | LDem | (2003-2005) | 0.6% |
| Keith Raffan | Mid Scotland and Fife | LDem | (1999-2003) | 3.1% |
| Keith Brown | Ochil | SNP | (2007-2011) | 0.0% |
| Lord Keith of Castleacre | (Lords) | Con | (1980-2004) | 0.0% |
| Lord Keith of Kinkel | (Lords) | Crossbench | (1977-2002) | n/a |
| Chris Kelly | Dudley South | Con | (2010-2015) | 2.4% |
| Ruth Kelly | Bolton West | Lab | (1997-2001) | 0.8% |
| Ruth Kelly | Bolton West | Lab | (2001-2005) | 0.9% |
| Ruth Kelly | Bolton West | Lab | (2005-2010) | 2.9% |
| Lord Kelvedon | (Lords) | Con | (1997-2007) | 0.0% |
| Fraser Kemp | Houghton and Washington East | Lab | (1997-2001) | 0.1% |
| Fraser Kemp | Houghton and Washington East | Lab | (2001-2005) | 0.7% |
| Fraser Kemp | Houghton and Washington East | Lab | (2005-2010) | 0.2% |
| Lord Kempsell | (Lords) | Con | (2023-present) | 0.9% |
| Liz Kendall | Leicester West | Lab | (2010-2015) | 0.2% |
| Liz Kendall | Leicester West | Lab | (2015-2017) | 1.0% |
| Liz Kendall | Leicester West | Lab | (2017-2019) | 0.6% |
| Liz Kendall | Leicester West | Lab | (2019-2024) | 0.0% |
| Liz Kendall | Leicester West | Lab | (2024-present) | 0.0% |
| Charles Kennedy | Ross, Skye and Inverness West | LDem | (1997-2001) | 1.1% |
| Charles Kennedy | Ross, Skye and Inverness West | LDem | (2001-2005) | 1.9% |
| Charles Kennedy | Ross, Skye and Lochaber | LDem | (2005-2010) | 1.7% |
| Charles Kennedy | Ross, Skye and Lochaber | LDem | (2010-2015) | 3.2% |
| Baroness Kennedy of Cradley | (Lords) | Lab | (2013-2020) | 0.3% |
| Baroness Kennedy of Cradley | (Lords) | Non-affiliated | (2020-present) | 7.8% |
| Jane Kennedy | Liverpool, Wavertree | Lab | (1997-2001) | 0.6% |
| Jane Kennedy | Liverpool, Wavertree | Lab | (2001-2005) | 0.4% |
| Jane Kennedy | Liverpool, Wavertree | Lab | (2005-2010) | 0.7% |
| Seema Kennedy | South Ribble | Con | (2015-2017) | 0.0% |
| Seema Kennedy | South Ribble | Con | (2017-2019) | 0.7% |
| Lord Kennedy of Southwark | (Lords) | Lab | (2010-present) | 0.4% |
| Baroness Kennedy of The Shaws | (Lords) | Lab | (1997-present) | 11.5% |
| Kenneth Gibson | Cunninghame North | SNP | (2011-2016) | n/a |
| Kenneth Gibson | Cunninghame North | SNP | (2007-2011) | 0.8% |
| Kenneth Gibson | Cunninghame North | SNP | (2016-2021) | n/a |
| Kenneth Gibson | Cunninghame North | SNP | (2021-present) | n/a |
| Kenneth Macintosh | Eastwood | Lab | (2011-2016) | n/a |
| Kenneth Macintosh | Eastwood | Lab | (2003-2007) | 0.5% |
| Kenneth Macintosh | Eastwood | Lab | (1999-2003) | 0.4% |
| Kenneth Macintosh | Eastwood | Lab | (2007-2011) | 0.0% |
| Kenneth Gibson | Glasgow | SNP | (1999-2003) | 1.8% |
| Kenneth Macintosh | West Scotland | Lab | (2016-2021) | n/a |
| Kenny MacAskill | Edinburgh East and Musselburgh | SNP | (2007-2011) | 0.0% |
| Kenny MacAskill | Edinburgh Eastern | SNP | (2011-2016) | n/a |
| Kenny MacAskill | Lothians | SNP | (2003-2007) | 1.0% |
| Kenny MacAskill | Lothians | SNP | (1999-2003) | 1.3% |
| George Kerevan | East Lothian | SNP | (2015-2017) | 0.0% |
| Calum Kerr | Berwickshire, Roxburgh and Selkirk | SNP | (2015-2017) | 0.0% |
| Lord Kerr of Kinlochard | (Lords) | Crossbench | (2004-present) | 19.3% |
| Stephen Kerr | Stirling | Con | (2017-2019) | 2.1% |
| Lord Kerr of Tonaghmore | (Lords) | Judge | (2009-2020) | n/a |
| Lord Kerslake | (Lords) | Crossbench | (2015-2023) | 11.6% |
| Lord Kestenbaum | (Lords) | Lab | (2011-present) | 0.0% |
| Kevin Stewart | Aberdeen Central | SNP | (2011-2016) | n/a |
| Kevin Stewart | Aberdeen Central | SNP | (2016-2021) | n/a |
| Kevin Stewart | Aberdeen Central | SNP | (2021-present) | n/a |
| Robert Key | Salisbury | Con | (1997-2001) | 1.2% |
| Robert Key | Salisbury | Con | (2001-2005) | 1.6% |
| Robert Key | Salisbury | Con | (2005-2010) | 3.9% |
| Kezia Dugdale | Lothian | Lab | (2011-2016) | n/a |
| Kezia Dugdale | Lothian | Lab | (2016-2019) | n/a |
| Piara S Khabra | Ealing, Southall | Lab | (1997-2001) | 0.1% |
| Piara S Khabra | Ealing, Southall | Lab | (2001-2005) | 1.1% |
| Piara S Khabra | Ealing, Southall | Lab | (2005-2007) | 0.8% |
| Afzal Khan | Manchester Rusholme | Lab | (2024-present) | 0.7% |
| Afzal Khan | Manchester, Gorton | Lab | (2017-2019) | 0.0% |
| Afzal Khan | Manchester, Gorton | Lab | (2019-2024) | 0.0% |
| Ayoub Khan | Birmingham Perry Barr | Independent | (2024-present) | n/a |
| Lord Khan of Burnley | (Lords) | Lab | (2021-present) | 0.2% |
| Imran Ahmad Khan | Wakefield | Con | (2019-2022) | 1.6% |
| Naushabah Khan | Gillingham and Rainham | Lab | (2024-present) | 0.6% |
| Sadiq Khan | Tooting | Lab | (2005-2010) | 1.8% |
| Sadiq Khan | Tooting | Lab | (2010-2015) | 0.1% |
| Sadiq Khan | Tooting | Lab | (2015-2016) | 0.0% |
| David Kidney | Stafford | Lab | (1997-2001) | 0.9% |
| David Kidney | Stafford | Lab | (2001-2005) | 1.1% |
| David Kidney | Stafford | Lab | (2005-2010) | 1.2% |
| Baroness Kidron | (Lords) | Crossbench | (2012-present) | 11.0% |
| Lord Kilclooney | (Lords) | Crossbench | (2001-present) | 41.1% |
| Peter Kilfoyle | Liverpool, Walton | Lab | (1997-2001) | 0.3% |
| Peter Kilfoyle | Liverpool, Walton | Lab | (2001-2005) | 4.9% |
| Peter Kilfoyle | Liverpool, Walton | Lab | (2005-2010) | 6.2% |
| Ged Killen | Rutherglen and Hamilton West | Lab | (2017-2019) | 0.5% |
| Lord Kilpatrick of Kincraig | (Lords) | Crossbench | (1996-2015) | n/a |
| Lord Kimball | (Lords) | Con | (1985-2014) | 0.3% |
| Danny Kinahan | South Antrim | UUP | (2015-2017) | 0.0% |
| Mr Andy King | Rugby and Kenilworth | Lab | (1997-2001) | 0.4% |
| Mr Andy King | Rugby and Kenilworth | Lab | (2001-2005) | 2.0% |
| Baroness King of Bow | (Lords) | Lab | (2011-2024) | 0.3% |
| Lord King of Bridgwater | (Lords) | Con | (2001-present) | 1.3% |
| Ms Tess Kingham | Gloucester | Lab | (1997-2001) | 0.9% |
| Lord King of Lothbury | (Lords) | Crossbench | (2013-present) | 70.6% |
| Ms Oona King | Bethnal Green and Bow | Lab | (1997-2001) | 0.4% |
| Ms Oona King | Bethnal Green and Bow | Lab | (2001-2005) | 0.9% |
| Lord Kingsdown | (Lords) | Crossbench | (1993-2013) | 22.6% |
| Lord Kingsland | (Lords) | Con | (1994-2009) | 0.8% |
| Baroness Kingsmill | (Lords) | Lab | (2006-present) | 0.2% |
| Mr Tom King | Bridgwater | Con | (1997-2001) | 0.3% |
| Lord King of Wartnaby | (Lords) | Con | (1983-2005) | 0.0% |
| Lord King of West Bromwich | (Lords) | Lab | (1999-2013) | 0.5% |
| Lord Kinnock | (Lords) | Lab | (2005-present) | 0.6% |
| Baroness Kinnock of Holyhead | (Lords) | Lab | (2009-2021) | 0.0% |
| Stephen Kinnock | Aberafan Maesteg | Lab | (2024-present) | 0.0% |
| Stephen Kinnock | Aberavon | Lab | (2015-2017) | 0.3% |
| Stephen Kinnock | Aberavon | Lab | (2017-2019) | 0.6% |
| Stephen Kinnock | Aberavon | Lab | (2019-2024) | 0.0% |
| The Earl of Kinnoull | (Lords) | Crossbench | (2015-2019) | 40.8% |
| The Earl of Kinnoull | (Lords) | Non-affiliated | (2019-present) | 31.6% |
| Simon Kirby | Brighton, Kemptown | Con | (2010-2015) | 1.5% |
| Simon Kirby | Brighton, Kemptown | Con | (2015-2017) | 0.0% |
| Julie Kirkbride | Bromsgrove | Con | (1997-2001) | 0.1% |
| Julie Kirkbride | Bromsgrove | Con | (2001-2005) | 1.8% |
| Julie Kirkbride | Bromsgrove | Con | (2005-2010) | 2.8% |
| Lord Kirkham | (Lords) | Con | (1999-present) | 0.4% |
| Jayne Kirkham | Truro and Falmouth | Lab | (2024-present) | 0.0% |
| Lord Kirkhill | (Lords) | Lab | (1975-2018) | 2.3% |
| Lord Kirkhope of Harrogate | (Lords) | Con | (2016-present) | 9.2% |
| Mr Archy Kirkwood | Roxburgh and Berwickshire | LDem | (1997-2001) | 2.2% |
| Mr Archy Kirkwood | Roxburgh and Berwickshire | LDem | (2001-2005) | 3.6% |
| Lord Kirkwood of Kirkhope | (Lords) | LDem | (2005-2020) | 2.5% |
| Gen Kitchen | Wellingborough | Lab | (2024-2024) | 0.0% |
| Gen Kitchen | Wellingborough and Rushden | Lab | (2024-present) | 0.0% |
| Baroness Knight of Collingtree | (Lords) | Con | (1997-2016) | 1.3% |
| Greg Knight | East Yorkshire | Con | (2001-2005) | 1.0% |
| Greg Knight | East Yorkshire | Con | (2005-2010) | 3.6% |
| Greg Knight | East Yorkshire | Con | (2010-2015) | 1.5% |
| Greg Knight | East Yorkshire | Con | (2015-2017) | 0.5% |
| Greg Knight | East Yorkshire | Con | (2017-2019) | 2.0% |
| Greg Knight | East Yorkshire | Con | (2019-2024) | 0.7% |
| Jim Knight | South Dorset | Lab | (2001-2005) | 0.5% |
| Jim Knight | South Dorset | Lab | (2005-2010) | 0.4% |
| Julian Knight | Solihull | Con | (2015-2017) | 0.0% |
| Julian Knight | Solihull | Con | (2017-2019) | 0.2% |
| Julian Knight | Solihull | whilst Con | (2019-2022) | 0.6% |
| Julian Knight | Solihull | whilst Independent | (2022-2024) | n/a |
| Lord Knights | (Lords) | Crossbench | (1987-2014) | 0.0% |
| Lord Knight of Weymouth | (Lords) | Lab | (2010-present) | 0.5% |
| Kate Kniveton | Burton | Con | (2019-2024) | 0.4% |
| Paul Kohler | Wimbledon | LDem | (2024-present) | 2.5% |
| Baroness Kramer | (Lords) | LDem | (2011-present) | 0.4% |
| Susan Kramer | Richmond Park | LDem | (2005-2010) | 0.7% |
| Lord Krebs | (Lords) | Crossbench | (2007-present) | 11.2% |
| Danny Kruger | Devizes | Con | (2019-2024) | 1.2% |
| Danny Kruger | East Wiltshire | Con | (2024-present) | 0.0% |
| Uma Kumaran | Stratford and Bow | Lab | (2024-present) | 2.1% |
| Ashok Kumar | Middlesbrough South and East Cleveland | Lab | (1997-2001) | 0.2% |
| Ashok Kumar | Middlesbrough South and East Cleveland | Lab | (2001-2005) | 0.8% |
| Ashok Kumar | Middlesbrough South and East Cleveland | Lab | (2005-2010) | 0.7% |
| Sonia Kumar | Dudley | Lab | (2024-present) | 0.0% |
| Kwasi Kwarteng | Spelthorne | Con | (2010-2015) | 0.4% |
| Kwasi Kwarteng | Spelthorne | Con | (2015-2017) | 0.0% |
| Kwasi Kwarteng | Spelthorne | Con | (2017-2019) | 0.7% |
| Kwasi Kwarteng | Spelthorne | Con | (2019-2024) | 0.0% |
| Peter Kyle | Hove | Lab | (2015-2017) | 2.1% |
| Peter Kyle | Hove | Lab | (2017-2019) | 0.5% |
| Peter Kyle | Hove | Lab | (2019-2024) | 0.0% |
| Peter Kyle | Hove and Portslade | Lab | (2024-present) | 0.0% |
| Laura Kyrke-Smith | Aylesbury | Lab | (2024-present) | 0.0% |
| Stephen Ladyman | South Thanet | Lab | (1997-2001) | 0.5% |
| Stephen Ladyman | South Thanet | Lab | (2001-2005) | 0.3% |
| Stephen Ladyman | South Thanet | Lab | (2005-2010) | 0.5% |
| Lord Laidlaw | (Lords) | Con | (2004-2010) | 3.0% |
| Lord Laing of Dunphail | (Lords) | Con | (1991-2010) | 0.7% |
| Baroness Laing of Elderslie | (Lords) | Con | (2024-present) | 0.0% |
| Eleanor Laing | Epping Forest | Con | (1997-2001) | 1.4% |
| Eleanor Laing | Epping Forest | Con | (2001-2005) | 0.9% |
| Eleanor Laing | Epping Forest | Con | (2005-2010) | 2.1% |
| Eleanor Laing | Epping Forest | Con | (2010-2015) | 0.9% |
| Eleanor Laing | Epping Forest | Con | (2015-2017) | n/a |
| Eleanor Laing | Epping Forest | Con | (2017-2019) | n/a |
| Eleanor Laing | Epping Forest | Con | (2019-2024) | 0.0% |
| Lord Laird | (Lords) | Crossbench | (1999-2009) | n/a |
| Lord Laird | (Lords) | Non-affiliated | (2013-2018) | 13.0% |
| Lord Laird | (Lords) | UUP | (1999-1999) | n/a |
| Lord Laird | (Lords) | UUP | (2009-2013) | n/a |
| Lesley Laird | Kirkcaldy and Cowdenbeath | Lab | (2017-2019) | 0.3% |
| Jacqui Lait | Beckenham | Con | (1997-2001) | 0.3% |
| Jacqui Lait | Beckenham | Con | (2001-2005) | 0.5% |
| Jacqui Lait | Beckenham | Con | (2005-2010) | 2.6% |
| Ben Lake | Ceredigion | PC | (2017-2019) | 0.0% |
| Ben Lake | Ceredigion | PC | (2019-2024) | 0.0% |
| Ben Lake | Ceredigion Preseli | PC | (2024-present) | 0.9% |
| Norman Lamb | North Norfolk | LDem | (2001-2005) | 3.0% |
| Norman Lamb | North Norfolk | LDem | (2005-2010) | 0.5% |
| Norman Lamb | North Norfolk | LDem | (2010-2015) | 0.2% |
| Norman Lamb | North Norfolk | LDem | (2015-2017) | 1.7% |
| Norman Lamb | North Norfolk | LDem | (2017-2019) | 0.7% |
| Peter Lamb | Crawley | Lab | (2024-present) | 1.6% |
| Lord Laming | (Lords) | Crossbench | (1998-present) | 33.1% |
| Katie Lam | Weald of Kent | Con | (2024-present) | 0.0% |
| David Lammy | Tottenham | Lab | (2000-2001) | 0.0% |
| David Lammy | Tottenham | Lab | (2001-2005) | 0.1% |
| David Lammy | Tottenham | Lab | (2005-2010) | 0.6% |
| David Lammy | Tottenham | Lab | (2010-2015) | 0.4% |
| David Lammy | Tottenham | Lab | (2015-2017) | 2.4% |
| David Lammy | Tottenham | Lab | (2017-2019) | 0.3% |
| David Lammy | Tottenham | Lab | (2019-2024) | 0.0% |
| David Lammy | Tottenham | Lab | (2024-present) | 5.6% |
| John Lamont | Berwickshire, Roxburgh and Selkirk | Con | (2017-2019) | 1.4% |
| John Lamont | Berwickshire, Roxburgh and Selkirk | Con | (2019-2024) | 0.1% |
| John Lamont | Berwickshire, Roxburgh and Selkirk | Con | (2024-present) | 1.3% |
| Lord Lamont of Lerwick | (Lords) | Con | (1998-present) | 1.6% |
| Baroness Lampard | (Lords) | Con | (2022-present) | 0.0% |
| Lord Lancaster of Kimbolton | (Lords) | Con | (2020-present) | 0.2% |
| Mark Lancaster | Milton Keynes North | Con | (2010-2015) | 0.6% |
| Mark Lancaster | Milton Keynes North | Con | (2015-2017) | 0.0% |
| Mark Lancaster | Milton Keynes North | Con | (2017-2019) | 0.2% |
| Mark Lancaster | North East Milton Keynes | Con | (2005-2010) | 2.1% |
| Lord Lane | (Lords) | Crossbench | (1990-2005) | 0.0% |
| Baroness Lane-Fox of Soho | (Lords) | Crossbench | (2013-present) | 13.6% |
| Lord Lane of Horsell | (Lords) | Con | (1990-2009) | 0.8% |
| Lord Lang of Monkton | (Lords) | Con | (1997-2022) | 0.6% |
| Lord Lansley | (Lords) | Con | (2015-present) | 3.9% |
| Andrew Lansley | South Cambridgeshire | Con | (1997-2001) | 0.5% |
| Andrew Lansley | South Cambridgeshire | Con | (2001-2005) | 1.2% |
| Andrew Lansley | South Cambridgeshire | Con | (2005-2010) | 2.2% |
| Andrew Lansley | South Cambridgeshire | Con | (2010-2015) | 1.0% |
| Robert Largan | High Peak | Con | (2019-2024) | 0.9% |
| Pauline Latham | Mid Derbyshire | Con | (2010-2015) | 1.0% |
| Pauline Latham | Mid Derbyshire | Con | (2015-2017) | 0.0% |
| Pauline Latham | Mid Derbyshire | Con | (2017-2019) | 2.6% |
| Pauline Latham | Mid Derbyshire | Con | (2019-2024) | 2.7% |
| Ian Lavery | Blyth and Ashington | Lab | (2024-present) | 1.3% |
| Ian Lavery | Wansbeck | Lab | (2010-2015) | 0.5% |
| Ian Lavery | Wansbeck | Lab | (2015-2017) | 0.3% |
| Ian Lavery | Wansbeck | Lab | (2017-2019) | 0.3% |
| Ian Lavery | Wansbeck | Lab | (2019-2024) | 0.4% |
| Chris Law | Dundee Central | SNP | (2024-present) | 1.4% |
| Chris Law | Dundee West | SNP | (2015-2017) | 0.0% |
| Chris Law | Dundee West | SNP | (2017-2019) | 0.0% |
| Chris Law | Dundee West | SNP | (2019-2024) | 0.0% |
| Baroness Lawlor | (Lords) | Con | (2022-present) | 0.0% |
| Noah Law | St Austell and Newquay | Lab | (2024-present) | 0.0% |
| Peter Law | Blaenau Gwent | Independent | (2005-2006) | n/a |
| Baroness Lawrence of Clarendon | (Lords) | Lab | (2013-present) | 0.4% |
| Mrs Jackie Lawrence | Preseli Pembrokeshire | Lab | (1997-2001) | 0.4% |
| Mrs Jackie Lawrence | Preseli Pembrokeshire | Lab | (2001-2005) | 1.4% |
| David Laws | Yeovil | LDem | (2001-2005) | 2.1% |
| David Laws | Yeovil | LDem | (2005-2010) | 0.8% |
| David Laws | Yeovil | LDem | (2010-2015) | 0.5% |
| Lord Lawson of Blaby | (Lords) | Con | (1992-2022) | 3.2% |
| Bob Laxton | Derby North | Lab | (1997-2001) | 0.8% |
| Bob Laxton | Derby North | Lab | (2001-2005) | 0.3% |
| Bob Laxton | Derby North | Lab | (2005-2010) | 0.6% |
| Lord Layard | (Lords) | Lab | (2000-present) | 0.8% |
| Mark Lazarowicz | Edinburgh North and Leith | Lab | (2001-2005) | 1.3% |
| Mark Lazarowicz | Edinburgh North and Leith | Lab | (2005-2010) | 1.7% |
| Mark Lazarowicz | Edinburgh North and Leith | Lab | (2010-2015) | 0.8% |
| Lord Leach of Fairford | (Lords) | Con | (2006-2016) | 1.2% |
| Lord Lea of Crondall | (Lords) | Lab | (1999-2020) | 0.3% |
| Lord Lea of Crondall | (Lords) | Non-affiliated | (2020-2022) | 5.4% |
| Kim Leadbeater | Batley and Spen | Lab | (2021-2024) | 0.0% |
| Kim Leadbeater | Spen Valley | Lab | (2024-present) | 0.0% |
| Graham Leadbitter | Moray West, Nairn and Strathspey | SNP | (2024-present) | 0.0% |
| Andrea Leadsom | South Northamptonshire | Con | (2010-2015) | 1.2% |
| Andrea Leadsom | South Northamptonshire | Con | (2015-2017) | 0.0% |
| Andrea Leadsom | South Northamptonshire | Con | (2017-2019) | 1.0% |
| Andrea Leadsom | South Northamptonshire | Con | (2019-2024) | 0.6% |
| Baroness Lea of Lymm | (Lords) | Con | (2022-present) | 0.0% |
| Lord Lebedev | (Lords) | Crossbench | (2020-present) | n/a |
| John Leech | Manchester, Withington | LDem | (2005-2010) | 0.4% |
| John Leech | Manchester, Withington | LDem | (2010-2015) | 6.2% |
| The Bishop of Leeds | (Lords) | Bishop | (2015-present) | 2.1% |
| Jessica Lee | Erewash | Con | (2010-2015) | 1.2% |
| Karen Lee | Lincoln | Lab | (2017-2019) | 0.5% |
| Phillip Lee | Bracknell | Con | (2010-2015) | 0.8% |
| Phillip Lee | Bracknell | Con | (2015-2017) | 0.0% |
| Phillip Lee | Bracknell | whilst Con | (2017-2019) | 11.6% |
| Phillip Lee | Bracknell | whilst LDem | (2019-2019) | 0.0% |
| Lord Lee of Trafford | (Lords) | LDem | (2006-present) | 1.2% |
| Jeremy Lefroy | Stafford | Con | (2010-2015) | 3.5% |
| Jeremy Lefroy | Stafford | Con | (2015-2017) | 1.4% |
| Jeremy Lefroy | Stafford | Con | (2017-2019) | 6.8% |
| The Bishop of Leicester | (Lords) | Bishop | (2003-2015) | 0.0% |
| The Bishop of Leicester | (Lords) | Bishop | (2022-present) | n/a |
| The Earl of Leicester | (Lords) | Con | (2021-present) | 0.8% |
| Edward Leigh | Gainsborough | Con | (1997-2001) | 1.1% |
| Edward Leigh | Gainsborough | Con | (2001-2005) | 2.2% |
| Edward Leigh | Gainsborough | Con | (2005-2010) | 2.2% |
| Edward Leigh | Gainsborough | Con | (2010-2015) | 6.9% |
| Edward Leigh | Gainsborough | Con | (2015-2017) | 1.7% |
| Edward Leigh | Gainsborough | Con | (2017-2019) | 1.8% |
| Edward Leigh | Gainsborough | Con | (2019-2024) | 1.6% |
| Edward Leigh | Gainsborough | Con | (2024-present) | 0.0% |
| Lord Leigh of Hurley | (Lords) | Con | (2013-present) | 0.6% |
| Brian Leishman | Alloa and Grangemouth | Lab | (2024-present) | 1.6% |
| Lord Leitch | (Lords) | Lab | (2004-2024) | 1.0% |
| Lord Lennie | (Lords) | Lab | (2014-present) | 0.2% |
| Lord Leong | (Lords) | Lab | (2022-present) | 0.0% |
| David Lepper | Brighton, Pavilion | Lab | (1997-2001) | 1.1% |
| David Lepper | Brighton, Pavilion | Lab | (2001-2005) | 0.8% |
| David Lepper | Brighton, Pavilion | Lab | (2005-2010) | 0.7% |
| Lesley Brennan | North East Scotland | Lab | (2016-2016) | n/a |
| Charlotte Leslie | Bristol North West | Con | (2010-2015) | 1.7% |
| Charlotte Leslie | Bristol North West | Con | (2015-2017) | 0.0% |
| Chris Leslie | Nottingham East | whilst Independent | (2019-2019) | n/a |
| Chris Leslie | Nottingham East | Lab | (2010-2015) | 0.3% |
| Chris Leslie | Nottingham East | Lab | (2015-2017) | 1.4% |
| Chris Leslie | Nottingham East | whilst Lab | (2017-2019) | 0.7% |
| Chris Leslie | Shipley | Lab | (1997-2001) | 0.0% |
| Chris Leslie | Shipley | Lab | (2001-2005) | 0.5% |
| Lord Lester of Herne Hill | (Lords) | LDem | (1993-2018) | 2.6% |
| Lord Lester of Herne Hill | (Lords) | Non-affiliated | (2018-2018) | n/a |
| Oliver Letwin | West Dorset | Con | (1997-2001) | 0.1% |
| Oliver Letwin | West Dorset | Con | (2001-2005) | 1.0% |
| Oliver Letwin | West Dorset | Con | (2005-2010) | 1.7% |
| Oliver Letwin | West Dorset | Con | (2010-2015) | 0.6% |
| Oliver Letwin | West Dorset | Con | (2015-2017) | 0.0% |
| Oliver Letwin | West Dorset | whilst Con | (2017-2019) | 9.2% |
| Oliver Letwin | West Dorset | whilst Independent | (2019-2019) | n/a |
| Lord Levene of Portsoken | (Lords) | Crossbench | (1997-2024) | 20.0% |
| Tom Levitt | High Peak | Lab | (1997-2001) | 0.3% |
| Tom Levitt | High Peak | Lab | (2001-2005) | 0.3% |
| Tom Levitt | High Peak | Lab | (2005-2010) | 0.6% |
| Lord Levy | (Lords) | Lab | (1997-present) | 0.2% |
| Ian Levy | Blyth Valley | Con | (2019-2024) | 0.1% |
| Emma Lewell-Buck | South Shields | Lab | (2013-2015) | 0.0% |
| Emma Lewell-Buck | South Shields | Lab | (2015-2017) | 0.3% |
| Emma Lewell-Buck | South Shields | Lab | (2017-2019) | 2.0% |
| Emma Lewell-Buck | South Shields | Lab | (2019-2024) | 0.8% |
| Emma Lewell-Buck | South Shields | Lab | (2024-present) | 1.8% |
| Andrew Lewer | Northampton South | Con | (2017-2019) | 2.7% |
| Andrew Lewer | Northampton South | Con | (2019-2024) | 2.5% |
| Andrew Lewin | Welwyn Hatfield | Lab | (2024-present) | 0.5% |
| Lewis Macdonald | Aberdeen Central | Lab | (2003-2007) | 0.0% |
| Lewis Macdonald | Aberdeen Central | Lab | (1999-2003) | 0.3% |
| Lewis Macdonald | Aberdeen Central | Lab | (2007-2011) | 0.4% |
| Lewis Macdonald | North East Scotland | Lab | (2011-2016) | n/a |
| Lewis Macdonald | North East Scotland | Lab | (2016-2021) | n/a |
| Brandon Lewis | Great Yarmouth | Con | (2010-2015) | 1.0% |
| Brandon Lewis | Great Yarmouth | Con | (2015-2017) | 0.0% |
| Brandon Lewis | Great Yarmouth | Con | (2017-2019) | 0.8% |
| Brandon Lewis | Great Yarmouth | Con | (2019-2024) | 0.2% |
| Clive Lewis | Norwich South | Lab | (2015-2017) | 1.0% |
| Clive Lewis | Norwich South | Lab | (2017-2019) | 0.6% |
| Clive Lewis | Norwich South | Lab | (2019-2024) | 0.5% |
| Clive Lewis | Norwich South | Lab | (2024-present) | 0.0% |
| Ivan Lewis | Bury South | whilst Independent | (2017-2019) | n/a |
| Ivan Lewis | Bury South | Lab | (1997-2001) | 0.1% |
| Ivan Lewis | Bury South | Lab | (2001-2005) | 0.4% |
| Ivan Lewis | Bury South | Lab | (2005-2010) | 0.4% |
| Ivan Lewis | Bury South | Lab | (2010-2015) | 0.0% |
| Ivan Lewis | Bury South | Lab | (2015-2017) | 0.0% |
| Ivan Lewis | Bury South | whilst Lab | (2017-2017) | 0.0% |
| Julian Lewis | New Forest East | Con | (1997-2001) | 0.5% |
| Julian Lewis | New Forest East | Con | (2001-2005) | 0.3% |
| Julian Lewis | New Forest East | Con | (2005-2010) | 0.9% |
| Julian Lewis | New Forest East | Con | (2010-2015) | 8.7% |
| Julian Lewis | New Forest East | Con | (2015-2017) | 3.9% |
| Julian Lewis | New Forest East | Con | (2017-2019) | 2.9% |
| Julian Lewis | New Forest East | whilst Con | (2019-2020) | 0.0% |
| Julian Lewis | New Forest East | whilst Con | (2020-2024) | 3.5% |
| Julian Lewis | New Forest East | Con | (2024-present) | 0.7% |
| Julian Lewis | New Forest East | whilst Independent | (2020-2020) | n/a |
| Lord Lewis of Newnham | (Lords) | Crossbench | (1989-2014) | 14.1% |
| Mr Terry Lewis | Worsley | Lab | (1997-2001) | 2.5% |
| Mr Terry Lewis | Worsley | Lab | (2001-2005) | 10.2% |
| Lord Lexden | (Lords) | Con | (2011-present) | 1.2% |
| Liam Kerr | North East Scotland | Con | (2016-2021) | n/a |
| Liam Kerr | North East Scotland | Con | (2021-present) | n/a |
| Liam McArthur | Orkney Islands | LDem | (2007-2011) | 0.2% |
| Liam McArthur | Orkney Islands | LDem | (2011-2016) | n/a |
| Liam McArthur | Orkney Islands | LDem | (2016-2021) | n/a |
| Liam McArthur | Orkney Islands | LDem | (2021-present) | n/a |
| The Bishop of Lichfield | (Lords) | Bishop | (1989-2003) | 0.0% |
| The Bishop of Lichfield | (Lords) | Bishop | (2009-2015) | 0.0% |
| The Bishop of Lichfield | (Lords) | Bishop | (2022-present) | 0.0% |
| Ian Liddell-Grainger | Bridgwater | Con | (2001-2005) | 1.0% |
| Ian Liddell-Grainger | Bridgwater | Con | (2005-2010) | 1.2% |
| Ian Liddell-Grainger | Bridgwater and West Somerset | Con | (2010-2015) | 1.7% |
| Ian Liddell-Grainger | Bridgwater and West Somerset | Con | (2015-2017) | 0.0% |
| Ian Liddell-Grainger | Bridgwater and West Somerset | Con | (2017-2019) | 2.8% |
| Ian Liddell-Grainger | Bridgwater and West Somerset | Con | (2019-2024) | 0.7% |
| Baroness Liddell of Coatdyke | (Lords) | Lab | (2010-present) | 0.6% |
| Mrs Helen Liddell | Airdrie and Shotts | Lab | (1997-2001) | 0.5% |
| Mrs Helen Liddell | Airdrie and Shotts | Lab | (2001-2005) | 0.3% |
| Lord Liddle | (Lords) | Lab | (2010-present) | 1.3% |
| David Lidington | Aylesbury | Con | (1997-2001) | 0.1% |
| David Lidington | Aylesbury | Con | (2001-2005) | 0.9% |
| David Lidington | Aylesbury | Con | (2005-2010) | 1.7% |
| David Lidington | Aylesbury | Con | (2010-2015) | 0.3% |
| David Lidington | Aylesbury | Con | (2015-2017) | 0.0% |
| David Lidington | Aylesbury | Con | (2017-2019) | 1.6% |
| Simon Lightwood | Wakefield | Lab | (2022-2024) | 0.3% |
| Simon Lightwood | Wakefield and Rothwell | Lab | (2024-present) | 0.0% |
| Lord Lilley | (Lords) | Con | (2018-present) | 1.5% |
| Peter Lilley | Hitchin and Harpenden | Con | (1997-2001) | 1.1% |
| Peter Lilley | Hitchin and Harpenden | Con | (2005-2010) | 2.5% |
| Peter Lilley | Hitchin and Harpenden | Con | (2010-2015) | 1.5% |
| Peter Lilley | Hitchin and Harpenden | Con | (2001-2005) | 1.5% |
| Peter Lilley | Hitchin and Harpenden | Con | (2015-2017) | 0.6% |
| The Bishop of Lincoln | (Lords) | Bishop | (1993-2001) | 0.0% |
| The Bishop of Lincoln | (Lords) | Bishop | (2008-2011) | 0.0% |
| The Bishop of Lincoln | (Lords) | Bishop | (2017-2021) | 2.8% |
| The Bishop of Lincoln | (Lords) | Bishop | (2023-present) | 0.0% |
| Linda Fabiani | Central Scotland | SNP | (2003-2007) | 2.3% |
| Linda Fabiani | Central Scotland | SNP | (1999-2003) | 1.9% |
| Linda Fabiani | Central Scotland | SNP | (2007-2011) | 0.2% |
| Linda Fabiani | East Kilbride | SNP | (2011-2016) | n/a |
| Linda Fabiani | East Kilbride | SNP | (2016-2021) | n/a |
| David Linden | Glasgow East | SNP | (2017-2019) | 0.3% |
| David Linden | Glasgow East | SNP | (2019-2024) | 0.0% |
| The Earl of Lindsay | (Lords) | Con | (1989-present) | 0.5% |
| Lord Lingfield | (Lords) | Con | (2010-present) | 0.2% |
| Baroness Linklater of Butterstone | (Lords) | LDem | (1997-2016) | 3.9% |
| Martin Linton | Battersea | Lab | (1997-2001) | 0.7% |
| Martin Linton | Battersea | Lab | (2001-2005) | 0.4% |
| Martin Linton | Battersea | Lab | (2005-2010) | 1.3% |
| Lord Lipsey | (Lords) | Lab | (1999-present) | 1.5% |
| Baroness Lister of Burtersett | (Lords) | Lab | (2011-present) | 0.3% |
| The Earl of Listowel | (Lords) | Crossbench | (1997-2022) | 17.0% |
| Lord Lisvane | (Lords) | Crossbench | (2015-present) | 5.0% |
| Emma Little-Pengelly | Belfast South | DUP | (2017-2019) | 0.3% |
| Lord Livermore | (Lords) | Lab | (2015-present) | 0.4% |
| The Bishop of Liverpool | (Lords) | Bishop | (2003-2013) | 2.6% |
| The Bishop of Liverpool | (Lords) | Bishop | (2021-2022) | n/a |
| The Earl of Liverpool | (Lords) | Con | (1969-present) | 2.5% |
| Ken Livingstone | Brent East | whilst Independent | (2000-2001) | n/a |
| Ken Livingstone | Brent East | whilst Lab | (1997-2000) | 3.3% |
| Lord Livingston of Parkhead | (Lords) | Con | (2013-present) | 6.6% |
| Mr Richard Livsey | Brecon and Radnorshire | LDem | (1997-2001) | 3.2% |
| Lord Livsey of Talgarth | (Lords) | LDem | (2001-2010) | 1.5% |
| Lord Llewellyn of Steep | (Lords) | Con | (2016-present) | n/a |
| Lloyd Quinan | West of Scotland | SNP | (1999-2003) | 7.8% |
| Lord Lloyd-Webber | (Lords) | Con | (1997-2017) | 19.0% |
| Lord Lloyd of Berwick | (Lords) | Crossbench | (1993-2015) | 20.3% |
| Baroness Lloyd of Highbury | (Lords) | Crossbench | (1996-2006) | n/a |
| Sir Peter Lloyd | Fareham | Con | (1997-2001) | 1.4% |
| Stephen Lloyd | Eastbourne | whilst Independent | (2018-2019) | n/a |
| Stephen Lloyd | Eastbourne | LDem | (2010-2015) | 1.1% |
| Stephen Lloyd | Eastbourne | whilst LDem | (2017-2018) | 0.0% |
| Tony Lloyd | Manchester Central | Lab | (1997-2001) | 0.3% |
| Tony Lloyd | Manchester Central | Lab | (2001-2005) | 2.9% |
| Tony Lloyd | Manchester Central | Lab | (2005-2010) | 1.0% |
| Tony Lloyd | Manchester Central | Lab | (2010-2012) | 0.7% |
| Tony Lloyd | Rochdale | Lab | (2017-2019) | 0.3% |
| Tony Lloyd | Rochdale | Lab | (2019-2024) | 0.0% |
| Elfyn Llwyd | Dwyfor Meirionnydd | PC | (2010-2015) | 0.9% |
| Elfyn Llwyd | Meirionnydd Nant Conwy | PC | (1997-2001) | 0.6% |
| Elfyn Llwyd | Meirionnydd Nant Conwy | PC | (2001-2005) | 0.7% |
| Elfyn Llwyd | Meirionnydd Nant Conwy | PC | (2005-2010) | 0.5% |
| Mr David Lock | Wyre Forest | Lab | (1997-2001) | 0.6% |
| Carla Lockhart | Upper Bann | DUP | (2019-2024) | 0.2% |
| Carla Lockhart | Upper Bann | DUP | (2024-present) | 0.0% |
| Baroness Lockwood | (Lords) | Lab | (1978-2017) | 0.8% |
| Chris Loder | West Dorset | Con | (2019-2024) | 1.0% |
| Lord Lofthouse of Pontefract | (Lords) | Lab | (1997-2012) | 3.7% |
| Mark Logan | Bolton North East | Con | (2019-2024) | 0.3% |
| Seamus Logan | Aberdeenshire North and Moray East | SNP | (2024-present) | 0.0% |
| Lord Londesborough | (Lords) | Crossbench | (2021-present) | 16.3% |
| The Bishop of London | (Lords) | Bishop | (1996-2017) | 0.0% |
| The Bishop of London | (Lords) | Bishop | (2018-present) | 0.0% |
| Rebecca Long-Bailey | Salford | whilst Independent | (2024-present) | n/a |
| Rebecca Long-Bailey | Salford | whilst Lab | (2024-2024) | 25.0% |
| Rebecca Long-Bailey | Salford and Eccles | Lab | (2015-2017) | 0.6% |
| Rebecca Long-Bailey | Salford and Eccles | Lab | (2017-2019) | 0.0% |
| Rebecca Long-Bailey | Salford and Eccles | Lab | (2019-2024) | 0.4% |
| The Earl of Longford | (Lords) | Lab | (1961-2001) | 10.1% |
| Marco Longhi | Dudley North | Con | (2019-2024) | 1.1% |
| Naomi Long | Belfast East | Alliance | (2010-2015) | 0.0% |
| Lord Loomba | (Lords) | Crossbench | (2017-present) | 26.8% |
| Lord Loomba | (Lords) | LDem | (2011-2016) | 1.4% |
| Lord Loomba | (Lords) | Non-affiliated | (2016-2017) | 15.6% |
| Julia Lopez | Hornchurch and Upminster | Con | (2017-2019) | 2.8% |
| Julia Lopez | Hornchurch and Upminster | Con | (2019-2024) | 0.2% |
| Julia Lopez | Hornchurch and Upminster | Con | (2024-present) | 0.0% |
| Jack Lopresti | Filton and Bradley Stoke | Con | (2010-2015) | 0.5% |
| Jack Lopresti | Filton and Bradley Stoke | Con | (2015-2017) | 0.0% |
| Jack Lopresti | Filton and Bradley Stoke | Con | (2017-2019) | 0.2% |
| Jack Lopresti | Filton and Bradley Stoke | Con | (2019-2024) | 0.5% |
| Jonathan Lord | Woking | Con | (2010-2015) | 0.6% |
| Jonathan Lord | Woking | Con | (2015-2017) | 0.3% |
| Jonathan Lord | Woking | Con | (2017-2019) | 2.2% |
| Jonathan Lord | Woking | Con | (2019-2024) | 1.8% |
| Michael Lord | Central Suffolk and North Ipswich | whilst Con | (2005-2005) | n/a |
| Michael Lord | Central Suffolk and North Ipswich | Deputy Speaker | (2001-2005) | n/a |
| Michael Lord | Central Suffolk and North Ipswich | whilst Deputy Speaker | (2005-2010) | n/a |
| Michael Lord | Central Suffolk and North Ipswich | Deputy Speaker | (1997-2001) | 0.0% |
| Lorna Slater | Lothian | Green | (2021-present) | n/a |
| The Marquess of Lothian | (Lords) | Con | (2010-2024) | 1.3% |
| Tim Loughton | East Worthing and Shoreham | Con | (1997-2001) | 0.5% |
| Tim Loughton | East Worthing and Shoreham | Con | (2001-2005) | 0.4% |
| Tim Loughton | East Worthing and Shoreham | Con | (2005-2010) | 0.6% |
| Tim Loughton | East Worthing and Shoreham | Con | (2010-2015) | 1.5% |
| Tim Loughton | East Worthing and Shoreham | Con | (2015-2017) | 1.2% |
| Tim Loughton | East Worthing and Shoreham | Con | (2017-2019) | 3.3% |
| Tim Loughton | East Worthing and Shoreham | Con | (2019-2024) | 4.9% |
| Andrew Love | Edmonton | Lab | (1997-2001) | 0.3% |
| Andrew Love | Edmonton | Lab | (2001-2005) | 0.8% |
| Andrew Love | Edmonton | Lab | (2005-2010) | 1.4% |
| Andrew Love | Edmonton | Lab | (2010-2015) | 0.6% |
| Lord Lovell-Davis | (Lords) | Lab | (1974-2001) | 0.0% |
| Lord Low of Dalston | (Lords) | Crossbench | (2006-present) | 23.2% |
| Rupert Lowe | Great Yarmouth | Reform UK | (2024-present) | 1.2% |
| Lord Lucas | (Lords) | Con | (1991-present) | 3.7% |
| Caroline Lucas | Brighton, Pavilion | Green | (2010-2015) | 0.0% |
| Caroline Lucas | Brighton, Pavilion | Green | (2015-2017) | 0.0% |
| Caroline Lucas | Brighton, Pavilion | Green | (2017-2019) | 0.0% |
| Caroline Lucas | Brighton, Pavilion | Green | (2019-2024) | 0.0% |
| Ian Lucas | Wrexham | Lab | (2001-2005) | 1.3% |
| Ian Lucas | Wrexham | Lab | (2005-2010) | 0.3% |
| Ian Lucas | Wrexham | Lab | (2010-2015) | 0.4% |
| Ian Lucas | Wrexham | Lab | (2015-2017) | 0.0% |
| Ian Lucas | Wrexham | Lab | (2017-2019) | 1.2% |
| Lord Luce | (Lords) | Crossbench | (2000-2020) | 35.4% |
| Baroness Ludford | (Lords) | LDem | (1997-present) | 0.9% |
| Peter Luff | Mid Worcestershire | Con | (1997-2001) | 0.1% |
| Peter Luff | Mid Worcestershire | Con | (2001-2005) | 1.2% |
| Peter Luff | Mid Worcestershire | Con | (2005-2010) | 1.5% |
| Peter Luff | Mid Worcestershire | Con | (2010-2015) | 0.4% |
| Lord Luke | (Lords) | Con | (1996-2015) | 0.5% |
| Mr Iain Luke | Dundee East | Lab | (2001-2005) | 1.5% |
| Karen Lumley | Redditch | Con | (2010-2015) | 1.7% |
| Karen Lumley | Redditch | Con | (2015-2017) | 0.0% |
| Lord Lupton | (Lords) | Con | (2015-2019) | 0.5% |
| Lord Lupton | (Lords) | Non-affiliated | (2019-present) | 74.8% |
| Lord Lyell | (Lords) | Con | (1943-2017) | 1.4% |
| Lord Lyell of Markyate | (Lords) | Con | (2005-2010) | 2.2% |
| Sir Nicholas Lyell | North East Bedfordshire | Con | (1997-2001) | 0.2% |
| Holly Lynch | Halifax | Lab | (2015-2017) | 0.9% |
| Holly Lynch | Halifax | Lab | (2017-2019) | 0.0% |
| Holly Lynch | Halifax | Lab | (2019-2024) | 0.1% |
| Lyndsay McIntosh | Central Scotland | Con | (1999-2003) | 0.5% |
| Mr John Lyons | Strathkelvin and Bearsden | Lab | (2001-2005) | 1.8% |
| The Earl of Lytton | (Lords) | Crossbench | (2011-present) | 20.6% |
| Màiri McAllan | Clydesdale | SNP | (2021-present) | n/a |
| Josh MacAlister | Whitehaven and Workington | Lab | (2024-present) | 0.0% |
| Kenny MacAskill | East Lothian | whilst Alba | (2021-2024) | 0.0% |
| Kenny MacAskill | East Lothian | whilst SNP | (2019-2021) | 0.0% |
| Lord Macaulay of Bragar | (Lords) | Lab | (1989-2002) | n/a |
| Lord Macaulay of Bragar | (Lords) | Lab | (2005-2013) | n/a |
| Lord Macaulay of Bragar | (Lords) | Non-affiliated | (2013-2014) | n/a |
| Lord Macaulay of Bragar | (Lords) | Other | (2002-2005) | n/a |
| James MacCleary | Lewes | LDem | (2024-present) | 0.0% |
| Alice Macdonald | Norwich North | Lab | (2024-present) | 0.0% |
| Angus MacDonald | Inverness, Skye and West Ross-shire | LDem | (2024-present) | 2.8% |
| Mr Calum MacDonald | Na h-Eileanan an Iar | Lab | (1997-2001) | 0.3% |
| Mr Calum MacDonald | Na h-Eileanan an Iar | Lab | (2001-2005) | 1.4% |
| Lord Macdonald of River Glaven | (Lords) | Crossbench | (2019-present) | 4.5% |
| Lord Macdonald of River Glaven | (Lords) | LDem | (2010-2018) | 7.9% |
| Lord Macdonald of River Glaven | (Lords) | Non-affiliated | (2018-2019) | 0.0% |
| Lord Macdonald of Tradeston | (Lords) | Lab | (1998-2017) | 0.5% |
| John MacDougall | Central Fife | Lab | (2001-2005) | 0.8% |
| John MacDougall | Glenrothes | Lab | (2005-2008) | 0.4% |
| Lord Macfarlane of Bearsden | (Lords) | Con | (1991-2016) | 2.0% |
| Mr John MacGregor | South Norfolk | Con | (1997-2001) | 0.4% |
| Lord MacGregor of Pulham Market | (Lords) | Con | (2001-2019) | 1.4% |
| Andrew MacKay | Bracknell | Con | (1997-2001) | 0.5% |
| Andrew MacKay | Bracknell | Con | (2001-2005) | 2.5% |
| Andrew MacKay | Bracknell | Con | (2005-2010) | 2.9% |
| Lord MacKay of Ardbrecknish | (Lords) | Crossbench | (1991-2001) | 18.0% |
| Lord Mackay of Clashfern | (Lords) | Con | (1979-2022) | 5.7% |
| Lord Mackay of Drumadoon | (Lords) | Judge | (1995-2017) | 0.0% |
| Lord Mackenzie-Stuart | (Lords) | Crossbench | (1988-2000) | n/a |
| Lord MacKenzie of Culkein | (Lords) | Lab | (1999-2024) | 0.9% |
| Lord Mackenzie of Framwellgate | (Lords) | Lab | (1998-2013) | 0.9% |
| Lord Mackenzie of Framwellgate | (Lords) | Non-affiliated | (2013-present) | 6.5% |
| Lord Mackie of Benshie | (Lords) | LDem | (1974-2015) | 3.7% |
| Andrew MacKinlay | Thurrock | Lab | (1997-2001) | 2.1% |
| Andrew MacKinlay | Thurrock | Lab | (2001-2005) | 5.9% |
| Andrew MacKinlay | Thurrock | Lab | (2005-2010) | 8.6% |
| Craig Mackinlay | South Thanet | Con | (2015-2017) | 0.2% |
| Craig Mackinlay | South Thanet | Con | (2017-2019) | 3.2% |
| Craig Mackinlay | South Thanet | Con | (2019-2024) | 3.2% |
| Lord Mackinlay of Richborough | (Lords) | Con | (2024-present) | 0.0% |
| David Mackintosh | Northampton South | Con | (2015-2017) | 0.0% |
| Cherilyn Mackrory | Truro and Falmouth | Con | (2019-2024) | 0.0% |
| Lord MacLaurin of Knebworth | (Lords) | Con | (1996-2017) | 0.9% |
| David Maclean | Penrith and The Border | Con | (1997-2001) | 0.7% |
| David Maclean | Penrith and The Border | Con | (2001-2005) | 0.9% |
| David Maclean | Penrith and The Border | Con | (2005-2010) | 0.5% |
| Rachel Maclean | Redditch | Con | (2017-2019) | 0.5% |
| Rachel Maclean | Redditch | Con | (2019-2024) | 0.3% |
| Lord MacLehose of Beoch | (Lords) | Crossbench | (1982-2000) | n/a |
| Mr Robert Maclennan | Caithness, Sutherland and Easter Ross | LDem | (1997-2001) | 0.6% |
| Lord Maclennan of Rogart | (Lords) | LDem | (2001-2020) | 4.6% |
| Baroness Macleod of Borve | (Lords) | Con | (1971-1999) | n/a |
| Mary Macleod | Brentford and Isleworth | Con | (2010-2015) | 1.0% |
| Andy MacNae | Rossendale and Darwen | Lab | (2024-present) | 0.0% |
| Angus MacNeil | Na h-Eileanan an Iar | whilst Independent | (2023-2024) | n/a |
| Angus MacNeil | Na h-Eileanan an Iar | SNP | (2005-2010) | 3.0% |
| Angus MacNeil | Na h-Eileanan an Iar | SNP | (2010-2015) | 0.7% |
| Angus MacNeil | Na h-Eileanan an Iar | SNP | (2015-2017) | 0.0% |
| Angus MacNeil | Na h-Eileanan an Iar | SNP | (2017-2019) | 0.0% |
| Angus MacNeil | Na h-Eileanan an Iar | whilst SNP | (2019-2023) | 0.0% |
| Lord Macpherson of Earl's Court | (Lords) | Crossbench | (2016-present) | 20.4% |
| Denis MacShane | Rotherham | Lab | (1997-2001) | 0.2% |
| Denis MacShane | Rotherham | Lab | (2001-2005) | 0.7% |
| Denis MacShane | Rotherham | Lab | (2005-2010) | 1.3% |
| Denis MacShane | Rotherham | Lab | (2010-2012) | 2.5% |
| Fiona Mactaggart | Slough | Lab | (1997-2001) | 0.4% |
| Fiona Mactaggart | Slough | Lab | (2001-2005) | 0.6% |
| Fiona Mactaggart | Slough | Lab | (2005-2010) | 1.7% |
| Fiona Mactaggart | Slough | Lab | (2010-2015) | 0.6% |
| Fiona Mactaggart | Slough | Lab | (2015-2017) | 1.3% |
| Justin Madders | Ellesmere Port and Bromborough | Lab | (2024-present) | 1.6% |
| Justin Madders | Ellesmere Port and Neston | Lab | (2015-2017) | 0.3% |
| Justin Madders | Ellesmere Port and Neston | Lab | (2017-2019) | 0.8% |
| Justin Madders | Ellesmere Port and Neston | Lab | (2019-2024) | 0.0% |
| Baroness Maddock | (Lords) | LDem | (1997-2020) | 0.7% |
| Mr David Madel | South West Bedfordshire | Con | (1997-2001) | 0.4% |
| Lord Magan of Castletown | (Lords) | Con | (2011-present) | 0.7% |
| Maggie Chapman | North East Scotland | Green | (2021-present) | n/a |
| Lord Maginnis of Drumglass | (Lords) | Crossbench | (2002-2009) | n/a |
| Lord Maginnis of Drumglass | (Lords) | Independent Ulster Unionist | (2013-present) | n/a |
| Lord Maginnis of Drumglass | (Lords) | Non-affiliated | (2012-2013) | 0.0% |
| Lord Maginnis of Drumglass | (Lords) | UUP | (2001-2002) | 0.0% |
| Lord Maginnis of Drumglass | (Lords) | UUP | (2009-2012) | n/a |
| Mr Ken Maginnis | Fermanagh and South Tyrone | UUP | (1997-2001) | 1.1% |
| Ben Maguire | North Cornwall | LDem | (2024-present) | 0.0% |
| Helen Maguire | Epsom and Ewell | LDem | (2024-present) | 0.0% |
| Khalid Mahmood | Birmingham, Perry Barr | Lab | (2001-2005) | 0.6% |
| Khalid Mahmood | Birmingham, Perry Barr | Lab | (2005-2010) | 1.4% |
| Khalid Mahmood | Birmingham, Perry Barr | Lab | (2010-2015) | 0.5% |
| Khalid Mahmood | Birmingham, Perry Barr | Lab | (2015-2017) | 0.0% |
| Khalid Mahmood | Birmingham, Perry Barr | Lab | (2017-2019) | 0.0% |
| Khalid Mahmood | Birmingham, Perry Barr | Lab | (2019-2024) | 0.0% |
| Shabana Mahmood | Birmingham Ladywood | Lab | (2024-present) | 5.0% |
| Shabana Mahmood | Birmingham, Ladywood | Lab | (2010-2015) | 0.1% |
| Shabana Mahmood | Birmingham, Ladywood | Lab | (2015-2017) | 0.0% |
| Shabana Mahmood | Birmingham, Ladywood | Lab | (2017-2019) | 0.0% |
| Shabana Mahmood | Birmingham, Ladywood | Lab | (2019-2024) | 0.0% |
| Mrs Alice Mahon | Halifax | Lab | (1997-2001) | 2.7% |
| Mrs Alice Mahon | Halifax | Lab | (2001-2005) | 9.7% |
| Anne Main | St Albans | Con | (2005-2010) | 1.8% |
| Anne Main | St Albans | Con | (2010-2015) | 8.5% |
| Anne Main | St Albans | Con | (2015-2017) | 1.8% |
| Anne Main | St Albans | Con | (2017-2019) | 1.5% |
| Lord Mair | (Lords) | Crossbench | (2016-present) | 12.3% |
| Mairi Gougeon | Angus North and Mearns | SNP | (2016-2021) | n/a |
| Mairi Gougeon | Angus North and Mearns | SNP | (2021-present) | n/a |
| Mr John Major | Huntingdon | Con | (1997-2001) | 1.2% |
| Alan Mak | Havant | Con | (2015-2017) | 0.0% |
| Alan Mak | Havant | Con | (2017-2019) | 0.7% |
| Alan Mak | Havant | Con | (2019-2024) | 0.0% |
| Alan Mak | Havant | Con | (2024-present) | 0.0% |
| Malcolm Chisholm | Edinburgh North and Leith | Lab | (2003-2007) | 0.4% |
| Malcolm Chisholm | Edinburgh North and Leith | Lab | (1999-2003) | 0.4% |
| Malcolm Chisholm | Edinburgh North and Leith | Lab | (2007-2011) | 1.2% |
| Malcolm Chisholm | Edinburgh Northern and Leith | Lab | (2011-2016) | n/a |
| Seema Malhotra | Feltham and Heston | Lab | (2011-2015) | 0.3% |
| Seema Malhotra | Feltham and Heston | Lab | (2015-2017) | 0.0% |
| Seema Malhotra | Feltham and Heston | Lab | (2017-2019) | 0.0% |
| Seema Malhotra | Feltham and Heston | Lab | (2019-2024) | 0.0% |
| Seema Malhotra | Feltham and Heston | Lab | (2024-present) | 2.2% |
| Shahid Malik | Dewsbury | Lab | (2005-2010) | 0.5% |
| Humfrey Malins | Woking | Con | (1997-2001) | 0.2% |
| Humfrey Malins | Woking | Con | (2001-2005) | 0.6% |
| Humfrey Malins | Woking | Con | (2005-2010) | 0.5% |
| Judy Mallaber | Amber Valley | Lab | (1997-2001) | 0.2% |
| Judy Mallaber | Amber Valley | Lab | (2001-2005) | 0.8% |
| Judy Mallaber | Amber Valley | Lab | (2005-2010) | 0.7% |
| Cathal Mallaghan | Mid Ulster | SF | (2024-present) | n/a |
| Baroness Mallalieu | (Lords) | Lab | (1991-present) | 9.0% |
| Lord Malloch-Brown | (Lords) | Crossbench | (2012-present) | 0.0% |
| Lord Malloch-Brown | (Lords) | Lab | (2007-2012) | 0.0% |
| Lord Malloch-Brown | (Lords) | Other | (2012-2012) | n/a |
| Mr Seamus Mallon | Newry and Armagh | SDLP | (1997-2001) | 0.0% |
| Mr Seamus Mallon | Newry and Armagh | SDLP | (2001-2005) | 0.0% |
| Kit Malthouse | North West Hampshire | Con | (2015-2017) | 0.2% |
| Kit Malthouse | North West Hampshire | Con | (2017-2019) | 0.2% |
| Kit Malthouse | North West Hampshire | Con | (2019-2024) | 0.5% |
| Kit Malthouse | North West Hampshire | Con | (2024-present) | 2.0% |
| Lord Mance | (Lords) | Judge | (2005-present) | 0.0% |
| The Bishop of Manchester | (Lords) | Bishop | (1998-2002) | 0.0% |
| The Bishop of Manchester | (Lords) | Bishop | (2002-2013) | 5.1% |
| The Bishop of Manchester | (Lords) | Bishop | (2020-present) | 0.0% |
| Lord Mancroft | (Lords) | Con | (1987-present) | 1.7% |
| Lord Mandelson | (Lords) | Lab | (2008-present) | 0.4% |
| Mr Peter Mandelson | Hartlepool | Lab | (1997-2001) | 0.4% |
| Mr Peter Mandelson | Hartlepool | Lab | (2001-2004) | 0.4% |
| Anthony Mangnall | Totnes | Con | (2019-2024) | 1.2% |
| Lord Mann | (Lords) | Non-affiliated | (2019-present) | 15.5% |
| Baroness Manningham-Buller | (Lords) | Crossbench | (2008-present) | 19.1% |
| John Mann | Bassetlaw | Lab | (2001-2005) | 1.5% |
| John Mann | Bassetlaw | Lab | (2005-2010) | 0.9% |
| John Mann | Bassetlaw | Lab | (2010-2015) | 0.8% |
| John Mann | Bassetlaw | Lab | (2015-2017) | 1.6% |
| Scott Mann | North Cornwall | Con | (2015-2017) | 0.2% |
| Scott Mann | North Cornwall | Con | (2017-2019) | 2.5% |
| Scott Mann | North Cornwall | Con | (2019-2024) | 0.0% |
| Baroness Manzoor | (Lords) | Con | (2016-present) | 0.3% |
| Baroness Manzoor | (Lords) | Crossbench | (2016-2016) | n/a |
| Baroness Manzoor | (Lords) | LDem | (2013-2016) | 2.0% |
| Lord Maples | (Lords) | Con | (2010-2012) | 1.3% |
| John Maples | Stratford-on-Avon | Con | (1997-2001) | 0.5% |
| John Maples | Stratford-on-Avon | Con | (2001-2005) | 0.9% |
| John Maples | Stratford-on-Avon | Con | (2005-2010) | 2.9% |
| The Countess of Mar | (Lords) | Crossbench | (1975-2020) | 19.5% |
| The Earl of Mar and Kellie | (Lords) | LDem | (2000-2017) | 1.1% |
| Marco Biagi | Edinburgh Central | SNP | (2011-2016) | n/a |
| Maree Todd | Caithness, Sutherland and Ross | SNP | (2021-present) | n/a |
| Maree Todd | Highlands and Islands | SNP | (2016-2021) | n/a |
| Dr John Marek | Wrexham | Lab | (1997-2001) | 4.4% |
| Margaret Mitchell | Central Scotland | Con | (2011-2016) | n/a |
| Margaret Mitchell | Central Scotland | Con | (2003-2007) | 0.8% |
| Margaret Mitchell | Central Scotland | Con | (2007-2011) | 0.6% |
| Margaret Mitchell | Central Scotland | Con | (2016-2021) | n/a |
| Margaret McCulloch | Central Scotland | Lab | (2011-2016) | n/a |
| Margaret Burgess | Cunninghame South | SNP | (2011-2016) | n/a |
| Margaret Smith | Edinburgh West | LDem | (2003-2007) | 0.8% |
| Margaret Smith | Edinburgh West | LDem | (1999-2003) | 2.0% |
| Margaret Smith | Edinburgh West | LDem | (2007-2011) | 0.2% |
| Margaret Curran | Glasgow Baillieston | Lab | (2003-2007) | 0.9% |
| Margaret Curran | Glasgow Baillieston | Lab | (1999-2003) | 0.1% |
| Margaret Curran | Glasgow Baillieston | Lab | (2007-2011) | 0.0% |
| Margaret Jamieson | Kilmarnock and Loudoun | Lab | (2003-2007) | 0.2% |
| Margaret Jamieson | Kilmarnock and Loudoun | Lab | (1999-2003) | 0.2% |
| Margaret Ewing | Moray | SNP | (2003-2006) | 1.9% |
| Margaret Ewing | Moray | SNP | (1999-2003) | 4.1% |
| Margaret McDougall | West Scotland | Lab | (2011-2016) | n/a |
| Margo MacDonald | Lothian | Independent | (2011-2014) | n/a |
| Margo MacDonald | Lothians | Independent | (2003-2007) | n/a |
| Margo MacDonald | Lothians | whilst Independent | (1999-2003) | n/a |
| Margo MacDonald | Lothians | whilst Independent | (2003-2003) | n/a |
| Margo MacDonald | Lothians | Independent | (2007-2011) | n/a |
| Marie McNair | Clydebank and Milngavie | SNP | (2021-present) | n/a |
| Marilyn Livingstone | Kirkcaldy | Lab | (2003-2007) | 0.2% |
| Marilyn Livingstone | Kirkcaldy | Lab | (1999-2003) | 0.3% |
| Marilyn Livingstone | Kirkcaldy | Lab | (2007-2011) | 0.2% |
| Mark McDonald | Aberdeen Donside | whilst Independent | (2018-2021) | n/a |
| Mark McDonald | Aberdeen Donside | SNP | (2013-2016) | n/a |
| Mark McDonald | Aberdeen Donside | whilst SNP | (2016-2018) | n/a |
| Mark Griffin | Central Scotland | Lab | (2011-2016) | n/a |
| Mark Griffin | Central Scotland | Lab | (2016-2021) | n/a |
| Mark Griffin | Central Scotland | Lab | (2021-present) | n/a |
| Mark Ballard | Lothians | Green | (2003-2007) | 0.1% |
| Mr Mark Ruskell | Mid Scotland and Fife | Green | (2003-2007) | 0.5% |
| Mr Mark Ruskell | Mid Scotland and Fife | Green | (2016-2021) | n/a |
| Mr Mark Ruskell | Mid Scotland and Fife | Green | (2021-present) | n/a |
| Mark McDonald | North East Scotland | SNP | (2011-2013) | n/a |
| Lord Markham | (Lords) | Con | (2022-present) | 0.3% |
| Lord Marks of Hale | (Lords) | Con | (2024-present) | 0.0% |
| Lord Marks of Henley-on-Thames | (Lords) | LDem | (2011-present) | 1.6% |
| Lord Marland | (Lords) | Con | (2006-present) | 0.9% |
| Lord Marlesford | (Lords) | Con | (1991-present) | 3.0% |
| Marlyn Glen | North East Scotland | Lab | (2003-2007) | 1.6% |
| Marlyn Glen | North East Scotland | Lab | (2007-2011) | 1.4% |
| Rob Marris | Wolverhampton South West | Lab | (2001-2005) | 1.7% |
| Rob Marris | Wolverhampton South West | Lab | (2005-2010) | 0.8% |
| Rob Marris | Wolverhampton South West | Lab | (2015-2017) | 1.8% |
| Gordon Marsden | Blackpool South | Lab | (1997-2001) | 0.4% |
| Gordon Marsden | Blackpool South | Lab | (2001-2005) | 0.4% |
| Gordon Marsden | Blackpool South | Lab | (2005-2010) | 1.7% |
| Gordon Marsden | Blackpool South | Lab | (2010-2015) | 0.6% |
| Gordon Marsden | Blackpool South | Lab | (2015-2017) | 0.0% |
| Gordon Marsden | Blackpool South | Lab | (2017-2019) | 0.5% |
| Mr Paul Marsden | Shrewsbury and Atcham | whilst Independent | (2005-2005) | n/a |
| Mr Paul Marsden | Shrewsbury and Atcham | Lab | (1997-2001) | 1.4% |
| Mr Paul Marsden | Shrewsbury and Atcham | whilst Lab | (2001-2001) | 26.4% |
| Mr Paul Marsden | Shrewsbury and Atcham | whilst LDem | (2001-2005) | 1.4% |
| Lord Marsh | (Lords) | Crossbench | (1981-2011) | 36.8% |
| Robert Marshall-Andrews | Medway | Lab | (1997-2001) | 5.0% |
| Robert Marshall-Andrews | Medway | Lab | (2001-2005) | 16.5% |
| Robert Marshall-Andrews | Medway | Lab | (2005-2010) | 13.3% |
| David Marshall | Glasgow East | Lab | (2005-2008) | 2.9% |
| David Marshall | Glasgow Shettleston | Lab | (1997-2001) | 1.5% |
| David Marshall | Glasgow Shettleston | Lab | (2001-2005) | 1.8% |
| Dr Jim Marshall | Leicester South | Lab | (1997-2001) | 2.0% |
| Dr Jim Marshall | Leicester South | Lab | (2001-2004) | 7.4% |
| Lord Marshall of Knightsbridge | (Lords) | Crossbench | (1998-2012) | 22.2% |
| Julie Marson | Hertford and Stortford | Con | (2019-2024) | 0.2% |
| Martin Whitfield | South Scotland | Lab | (2021-present) | n/a |
| Amanda Martin | Portsmouth North | Lab | (2024-present) | 0.0% |
| Michael Martin | Glasgow North East | whilst Independent | (2005-2005) | n/a |
| Michael Martin | Glasgow North East | whilst Speaker | (2005-2009) | n/a |
| Michael Martin | Glasgow Springburn | whilst Deputy Speaker | (1997-2000) | 0.0% |
| Michael Martin | Glasgow Springburn | whilst Speaker | (2000-2001) | n/a |
| Michael Martin | Glasgow Springburn | Speaker | (2001-2005) | n/a |
| Mike Martin | Tunbridge Wells | LDem | (2024-present) | 0.0% |
| Sandy Martin | Ipswich | Lab | (2017-2019) | 0.3% |
| Lord Martin of Springburn | (Lords) | Crossbench | (2009-2018) | 30.2% |
| Eric Martlew | Carlisle | Lab | (1997-2001) | 0.4% |
| Eric Martlew | Carlisle | Lab | (2001-2005) | 2.5% |
| Eric Martlew | Carlisle | Lab | (2005-2010) | 1.1% |
| Mary Scanlon | Highlands and Islands | Con | (2011-2016) | n/a |
| Mary Scanlon | Highlands and Islands | Con | (2003-2006) | 0.8% |
| Mary Scanlon | Highlands and Islands | Con | (1999-2003) | 0.4% |
| Mary Scanlon | Highlands and Islands | Con | (2007-2011) | 0.2% |
| Mary Mulligan | Linlithgow | Lab | (2003-2007) | 0.5% |
| Mary Mulligan | Linlithgow | Lab | (1999-2003) | 0.2% |
| Mary Mulligan | Linlithgow | Lab | (2007-2011) | 0.4% |
| Mary Fee | West Scotland | Lab | (2011-2016) | n/a |
| Mary Fee | West Scotland | Lab | (2016-2021) | n/a |
| Baroness Masham of Ilton | (Lords) | Crossbench | (1970-2023) | 18.6% |
| Rachael Maskell | York Central | Lab | (2015-2017) | 1.6% |
| Rachael Maskell | York Central | Lab | (2017-2019) | 2.0% |
| Rachael Maskell | York Central | Lab | (2019-2024) | 0.6% |
| Rachael Maskell | York Central | Lab | (2024-present) | 2.1% |
| Paul Maskey | Belfast West | SF | (2011-2015) | n/a |
| Paul Maskey | Belfast West | SF | (2015-2017) | n/a |
| Paul Maskey | Belfast West | SF | (2017-2019) | n/a |
| Paul Maskey | Belfast West | SF | (2019-2024) | n/a |
| Paul Maskey | Belfast West | SF | (2024-present) | n/a |
| Lord Mason of Barnsley | (Lords) | Lab | (1987-2015) | 4.2% |
| John Mason | Glasgow East | SNP | (2008-2010) | 0.4% |
| Baroness Massey of Darwen | (Lords) | Lab | (1999-2024) | 0.7% |
| Paul Masterton | East Renfrewshire | Con | (2017-2019) | 5.5% |
| Michael Mates | East Hampshire | Con | (1997-2001) | 0.6% |
| Michael Mates | East Hampshire | Con | (2001-2005) | 1.0% |
| Michael Mates | East Hampshire | Con | (2005-2010) | 1.6% |
| Keir Mather | Selby | Lab | (2024-present) | 0.0% |
| Keir Mather | Selby and Ainsty | Lab | (2023-2024) | 0.0% |
| Chris Matheson | City of Chester | Lab | (2015-2017) | 0.3% |
| Chris Matheson | City of Chester | Lab | (2017-2019) | 0.3% |
| Chris Matheson | City of Chester | Lab | (2019-2022) | 0.0% |
| Brian Mathew | Melksham and Devizes | LDem | (2024-present) | 2.0% |
| Tania Mathias | Twickenham | Con | (2015-2017) | 2.1% |
| Francis Maude | Horsham | Con | (1997-2001) | 0.0% |
| Francis Maude | Horsham | Con | (2001-2005) | 1.1% |
| Francis Maude | Horsham | Con | (2005-2010) | 2.2% |
| Francis Maude | Horsham | Con | (2010-2015) | 0.8% |
| Lord Maude of Horsham | (Lords) | Con | (2015-present) | 0.0% |
| Maureen Watt | Aberdeen South and North Kincardine | SNP | (2011-2016) | n/a |
| Maureen Watt | Aberdeen South and North Kincardine | SNP | (2016-2021) | n/a |
| Maureen Macmillan | Highlands and Islands | Lab | (2003-2007) | 0.2% |
| Maureen Macmillan | Highlands and Islands | Lab | (1999-2003) | 1.0% |
| Maureen Watt | North East Scotland | SNP | (2006-2007) | 0.7% |
| Maureen Watt | North East Scotland | SNP | (2007-2011) | 0.0% |
| Maurice Golden | North East Scotland | Con | (2021-present) | n/a |
| Maurice Corry | West Scotland | Con | (2016-2021) | n/a |
| Maurice Golden | West Scotland | Con | (2016-2021) | n/a |
| Lord Mawhinney | (Lords) | Con | (2005-2019) | 1.9% |
| Dr Brian Mawhinney | North West Cambridgeshire | Con | (1997-2001) | 0.4% |
| Dr Brian Mawhinney | North West Cambridgeshire | Con | (2001-2005) | 2.2% |
| Lord Mawson | (Lords) | Crossbench | (2007-present) | 40.7% |
| Lord Maxton | (Lords) | Lab | (2004-present) | 1.0% |
| Mr John Maxton | Glasgow Cathcart | Lab | (1997-2001) | 0.9% |
| Alex Mayer | Dunstable and Leighton Buzzard | Lab | (2024-present) | 0.0% |
| Jerome Mayhew | Broadland | Con | (2019-2024) | 0.0% |
| Jerome Mayhew | Broadland and Fakenham | Con | (2024-present) | 0.7% |
| Lord Mayhew of Twysden | (Lords) | Con | (1997-2015) | 1.6% |
| Baroness May of Maidenhead | (Lords) | Con | (2024-present) | 0.0% |
| Charlie Maynard | Witney | LDem | (2024-present) | 0.9% |
| Paul Maynard | Blackpool North and Cleveleys | Con | (2010-2015) | 0.9% |
| Paul Maynard | Blackpool North and Cleveleys | Con | (2015-2017) | 0.0% |
| Paul Maynard | Blackpool North and Cleveleys | Con | (2017-2019) | 0.2% |
| Paul Maynard | Blackpool North and Cleveleys | Con | (2019-2024) | 0.5% |
| Lord May of Oxford | (Lords) | Crossbench | (2001-2017) | 33.1% |
| Theresa May | Maidenhead | Con | (1997-2001) | 0.1% |
| Theresa May | Maidenhead | Con | (2001-2005) | 0.5% |
| Theresa May | Maidenhead | Con | (2005-2010) | 1.0% |
| Theresa May | Maidenhead | Con | (2010-2015) | 1.0% |
| Theresa May | Maidenhead | Con | (2015-2017) | 0.0% |
| Theresa May | Maidenhead | Con | (2017-2019) | 0.8% |
| Theresa May | Maidenhead | Con | (2019-2024) | 0.9% |
| John McAllion | Dundee East | Lab | (1997-2001) | 4.5% |
| Douglas McAllister | West Dunbartonshire | Lab | (2024-present) | 2.3% |
| Lord McAlpine of West Green | (Lords) | Con | (2003-2010) | n/a |
| Lord McAlpine of West Green | (Lords) | Other | (1984-2003) | n/a |
| Lord McAvoy | (Lords) | Lab | (2010-2024) | 1.2% |
| Thomas McAvoy | Glasgow Rutherglen | Lab | (1997-2001) | 0.3% |
| Thomas McAvoy | Glasgow Rutherglen | Lab | (2001-2005) | 1.3% |
| Thomas McAvoy | Rutherglen and Hamilton West | Lab | (2005-2010) | 2.2% |
| Steve McCabe | Birmingham, Hall Green | Lab | (1997-2001) | 0.1% |
| Steve McCabe | Birmingham, Hall Green | Lab | (2001-2005) | 1.0% |
| Steve McCabe | Birmingham, Hall Green | Lab | (2005-2010) | 0.8% |
| Steve McCabe | Birmingham, Selly Oak | Lab | (2010-2015) | 0.2% |
| Steve McCabe | Birmingham, Selly Oak | Lab | (2015-2017) | 0.0% |
| Steve McCabe | Birmingham, Selly Oak | Lab | (2017-2019) | 0.6% |
| Steve McCabe | Birmingham, Selly Oak | Lab | (2019-2024) | 0.0% |
| Chris McCafferty | Calder Valley | Lab | (1997-2001) | 0.7% |
| Chris McCafferty | Calder Valley | Lab | (2001-2005) | 3.9% |
| Chris McCafferty | Calder Valley | Lab | (2005-2010) | 2.3% |
| Callum McCaig | Aberdeen South | SNP | (2015-2017) | 0.0% |
| Elisha McCallion | Foyle | SF | (2017-2019) | n/a |
| Michael McCann | East Kilbride, Strathaven and Lesmahagow | Lab | (2010-2015) | 1.0% |
| Lord McCarthy | (Lords) | Lab | (1976-2012) | 4.7% |
| Sarah McCarthy-Fry | Portsmouth North | Lab | (2005-2010) | 0.4% |
| Kerry McCarthy | Bristol East | Lab | (2005-2010) | 0.5% |
| Kerry McCarthy | Bristol East | Lab | (2010-2015) | 0.2% |
| Kerry McCarthy | Bristol East | Lab | (2015-2017) | 1.5% |
| Kerry McCarthy | Bristol East | Lab | (2017-2019) | 0.3% |
| Kerry McCarthy | Bristol East | Lab | (2019-2024) | 0.0% |
| Kerry McCarthy | Bristol East | Lab | (2024-present) | 0.0% |
| Ian McCartney | Makerfield | Lab | (1997-2001) | 0.0% |
| Ian McCartney | Makerfield | Lab | (2001-2005) | 0.1% |
| Ian McCartney | Makerfield | Lab | (2005-2010) | 0.7% |
| Jason McCartney | Colne Valley | Con | (2010-2015) | 5.6% |
| Jason McCartney | Colne Valley | Con | (2015-2017) | 5.2% |
| Jason McCartney | Colne Valley | Con | (2019-2024) | 4.5% |
| Karl McCartney | Lincoln | Con | (2010-2015) | 3.8% |
| Karl McCartney | Lincoln | Con | (2015-2017) | 1.3% |
| Karl McCartney | Lincoln | Con | (2019-2024) | 3.0% |
| Robert McCartney | North Down | UKUP | (1997-2001) | 0.0% |
| Lord McCluskey | (Lords) | Crossbench | (1976-2017) | 33.3% |
| Martin McCluskey | Inverclyde and Renfrewshire West | Lab | (2024-present) | 1.7% |
| Gregg McClymont | Cumbernauld, Kilsyth and Kirkintilloch East | Lab | (2010-2015) | 0.1% |
| Lord McColl of Dulwich | (Lords) | Con | (1989-present) | 1.7% |
| Lord McConnell | (Lords) | Crossbench | (1995-2000) | 24.4% |
| Lord McConnell of Glenscorrodale | (Lords) | Lab | (2010-present) | 0.6% |
| Lord McCrea of Magherafelt and Cookstown | (Lords) | DUP | (2018-present) | 1.1% |
| William McCrea | South Antrim | DUP | (2000-2001) | 0.0% |
| William McCrea | South Antrim | DUP | (2005-2010) | 0.2% |
| William McCrea | South Antrim | DUP | (2010-2015) | 0.2% |
| Baroness McDonagh | (Lords) | Lab | (2004-2023) | 0.7% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (1997-2001) | 0.0% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (2001-2005) | 0.3% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (2005-2010) | 0.7% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (2010-2015) | 0.3% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (2015-2017) | 0.7% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (2017-2019) | 1.7% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (2019-2024) | 0.0% |
| Siobhain McDonagh | Mitcham and Morden | Lab | (2024-present) | 3.1% |
| Andy McDonald | Middlesbrough | Lab | (2012-2015) | 0.0% |
| Andy McDonald | Middlesbrough | Lab | (2015-2017) | 0.0% |
| Andy McDonald | Middlesbrough | Lab | (2017-2019) | 0.3% |
| Andy McDonald | Middlesbrough | Lab | (2019-2024) | 0.1% |
| Andy McDonald | Middlesbrough and Thornaby East | Lab | (2024-present) | 0.6% |
| Chris McDonald | Stockton North | Lab | (2024-present) | 2.1% |
| Lord McDonald of Salford | (Lords) | Crossbench | (2021-present) | 28.0% |
| Stewart McDonald | Glasgow South | SNP | (2015-2017) | 0.7% |
| Stewart McDonald | Glasgow South | SNP | (2017-2019) | 0.0% |
| Stewart McDonald | Glasgow South | SNP | (2019-2024) | 0.0% |
| Stuart McDonald | Cumbernauld, Kilsyth and Kirkintilloch East | SNP | (2015-2017) | 0.0% |
| Stuart McDonald | Cumbernauld, Kilsyth and Kirkintilloch East | SNP | (2017-2019) | 0.0% |
| Stuart McDonald | Cumbernauld, Kilsyth and Kirkintilloch East | SNP | (2019-2024) | 0.0% |
| Alasdair McDonnell | Belfast South | SDLP | (2005-2010) | 0.0% |
| Alasdair McDonnell | Belfast South | SDLP | (2010-2015) | 1.0% |
| Alasdair McDonnell | Belfast South | SDLP | (2015-2017) | 1.1% |
| John Martin McDonnell | Hayes and Harlington | whilst Independent | (2024-present) | n/a |
| John Martin McDonnell | Hayes and Harlington | Lab | (1997-2001) | 7.0% |
| John Martin McDonnell | Hayes and Harlington | Lab | (2001-2005) | 18.4% |
| John Martin McDonnell | Hayes and Harlington | Lab | (2005-2010) | 24.9% |
| John Martin McDonnell | Hayes and Harlington | Lab | (2010-2015) | 4.4% |
| John Martin McDonnell | Hayes and Harlington | Lab | (2015-2017) | 0.9% |
| John Martin McDonnell | Hayes and Harlington | Lab | (2017-2019) | 0.6% |
| John Martin McDonnell | Hayes and Harlington | Lab | (2019-2024) | 0.6% |
| John Martin McDonnell | Hayes and Harlington | whilst Lab | (2024-2024) | 25.0% |
| Blair McDougall | East Renfrewshire | Lab | (2024-present) | 2.0% |
| Barry McElduff | West Tyrone | SF | (2017-2018) | n/a |
| Lola McEvoy | Darlington | Lab | (2024-present) | 2.1% |
| Pat McFadden | Wolverhampton South East | Lab | (2005-2010) | 0.4% |
| Pat McFadden | Wolverhampton South East | Lab | (2010-2015) | 0.1% |
| Pat McFadden | Wolverhampton South East | Lab | (2015-2017) | 1.0% |
| Pat McFadden | Wolverhampton South East | Lab | (2017-2019) | 0.0% |
| Pat McFadden | Wolverhampton South East | Lab | (2019-2024) | 0.0% |
| Pat McFadden | Wolverhampton South East | Lab | (2024-present) | 0.0% |
| Lord McFall of Alcluith | (Lords) | Lab | (2010-2016) | 0.0% |
| Lord McFall of Alcluith | (Lords) | Non-affiliated | (2016-present) | 0.0% |
| John McFall | Dumbarton | Lab | (1997-2001) | 0.4% |
| John McFall | Dumbarton | Lab | (2001-2005) | 1.4% |
| John McFall | West Dunbartonshire | Lab | (2005-2010) | 2.2% |
| Baroness McFarlane of Llandaff | (Lords) | Crossbench | (1979-2012) | 11.1% |
| Natalie McGarry | Glasgow East | whilst Independent | (2015-2017) | n/a |
| Natalie McGarry | Glasgow East | whilst SNP | (2015-2015) | 0.0% |
| Conor McGinn | St Helens North | whilst Independent | (2022-2024) | n/a |
| Conor McGinn | St Helens North | Lab | (2015-2017) | 1.3% |
| Conor McGinn | St Helens North | Lab | (2017-2019) | 0.0% |
| Conor McGinn | St Helens North | whilst Lab | (2019-2022) | 0.0% |
| Alison McGovern | Birkenhead | Lab | (2024-present) | 0.0% |
| Alison McGovern | Wirral South | Lab | (2010-2015) | 0.2% |
| Alison McGovern | Wirral South | Lab | (2015-2017) | 1.0% |
| Alison McGovern | Wirral South | Lab | (2017-2019) | 0.0% |
| Alison McGovern | Wirral South | Lab | (2019-2024) | 0.0% |
| Jim McGovern | Dundee West | Lab | (2005-2010) | 2.5% |
| Jim McGovern | Dundee West | Lab | (2010-2015) | 1.6% |
| Eddie McGrady | South Down | SDLP | (1997-2001) | 0.0% |
| Eddie McGrady | South Down | SDLP | (2001-2005) | 0.0% |
| Eddie McGrady | South Down | SDLP | (2005-2010) | 0.4% |
| Baroness McGregor-Smith | (Lords) | Con | (2015-present) | 0.9% |
| Martin McGuinness | Mid Ulster | SF | (1997-2001) | n/a |
| Martin McGuinness | Mid Ulster | SF | (2001-2005) | n/a |
| Martin McGuinness | Mid Ulster | SF | (2005-2010) | n/a |
| Martin McGuinness | Mid Ulster | SF | (2010-2013) | n/a |
| Anne McGuire | Stirling | Lab | (1997-2001) | 0.3% |
| Anne McGuire | Stirling | Lab | (2001-2005) | 1.1% |
| Anne McGuire | Stirling | Lab | (2005-2010) | 1.0% |
| Anne McGuire | Stirling | Lab | (2010-2015) | 0.5% |
| Lord McInnes of Kilwinning | (Lords) | Con | (2016-present) | 1.3% |
| Liz McInnes | Heywood and Middleton | Lab | (2014-2015) | 0.0% |
| Liz McInnes | Heywood and Middleton | Lab | (2015-2017) | 0.5% |
| Liz McInnes | Heywood and Middleton | Lab | (2017-2019) | 0.3% |
| Anne McIntosh | Thirsk and Malton | Con | (2010-2015) | 2.3% |
| Anne McIntosh | Vale of York | Con | (1997-2001) | 0.8% |
| Anne McIntosh | Vale of York | Con | (2001-2005) | 0.5% |
| Anne McIntosh | Vale of York | Con | (2005-2010) | 2.1% |
| Lord McIntosh of Haringey | (Lords) | Lab | (1983-2010) | 1.0% |
| Baroness McIntosh of Hudnall | (Lords) | Lab | (1999-present) | 0.7% |
| Baroness McIntosh of Pickering | (Lords) | Con | (2015-present) | 10.5% |
| Alex McIntyre | Gloucester | Lab | (2024-present) | 2.0% |
| Shona McIsaac | Cleethorpes | Lab | (1997-2001) | 0.0% |
| Shona McIsaac | Cleethorpes | Lab | (2001-2005) | 0.3% |
| Shona McIsaac | Cleethorpes | Lab | (2005-2010) | 0.9% |
| Ann McKechin | Glasgow Maryhill | Lab | (2001-2005) | 1.2% |
| Ann McKechin | Glasgow North | Lab | (2005-2010) | 0.6% |
| Ann McKechin | Glasgow North | Lab | (2010-2015) | 0.1% |
| Gordon McKee | Glasgow South | Lab | (2024-present) | 1.8% |
| Kevin McKenna | Sittingbourne and Sheppey | Lab | (2024-present) | 0.0% |
| Rosemary McKenna | Cumbernauld and Kilsyth | Lab | (1997-2001) | 0.1% |
| Rosemary McKenna | Cumbernauld and Kilsyth | Lab | (2001-2005) | 1.2% |
| Rosemary McKenna | Cumbernauld, Kilsyth and Kirkintilloch East | Lab | (2005-2010) | 1.2% |
| Iain McKenzie | Inverclyde | Lab | (2011-2015) | 0.3% |
| Lord McKenzie of Luton | (Lords) | Lab | (2004-2021) | 0.6% |
| Catherine McKinnell | Newcastle upon Tyne North | Lab | (2010-2015) | 0.2% |
| Catherine McKinnell | Newcastle upon Tyne North | Lab | (2015-2017) | 1.3% |
| Catherine McKinnell | Newcastle upon Tyne North | Lab | (2017-2019) | 0.3% |
| Catherine McKinnell | Newcastle upon Tyne North | Lab | (2019-2024) | 0.0% |
| Catherine McKinnell | Newcastle upon Tyne North | Lab | (2024-present) | 2.0% |
| Anne McLaughlin | Glasgow North East | SNP | (2015-2017) | 0.0% |
| Anne McLaughlin | Glasgow North East | SNP | (2019-2024) | 0.0% |
| Henry McLeish | Central Fife | Lab | (1997-2001) | 0.0% |
| Lord McLoughlin | (Lords) | Con | (2020-present) | 1.3% |
| Patrick McLoughlin | Derbyshire Dales | Con | (2010-2015) | 0.6% |
| Patrick McLoughlin | Derbyshire Dales | Con | (2015-2017) | 0.0% |
| Patrick McLoughlin | Derbyshire Dales | Con | (2017-2019) | 1.2% |
| Patrick McLoughlin | West Derbyshire | Con | (1997-2001) | 0.2% |
| Patrick McLoughlin | West Derbyshire | Con | (2001-2005) | 1.2% |
| Patrick McLoughlin | West Derbyshire | Con | (2005-2010) | 1.3% |
| Jim McMahon | Oldham West and Royton | Lab | (2015-2017) | 0.0% |
| Jim McMahon | Oldham West and Royton | Lab | (2017-2019) | 0.0% |
| Jim McMahon | Oldham West and Royton | Lab | (2019-2024) | 0.0% |
| Jim McMahon | Oldham West, Chadderton and Royton | Lab | (2024-present) | 1.2% |
| Mr Gordon McMaster | Paisley South | Lab | (1997-1997) | 0.0% |
| Anna McMorrin | Cardiff North | Lab | (2017-2019) | 1.3% |
| Anna McMorrin | Cardiff North | Lab | (2019-2024) | 0.0% |
| Anna McMorrin | Cardiff North | Lab | (2024-present) | 0.0% |
| James McMurdock | South Basildon and East Thurrock | Reform UK | (2024-present) | 0.7% |
| Lord McNally | (Lords) | LDem | (1995-present) | 1.2% |
| Frank McNally | Coatbridge and Bellshill | Lab | (2024-present) | 1.9% |
| John McNally | Falkirk | SNP | (2015-2017) | 0.0% |
| John McNally | Falkirk | SNP | (2017-2019) | 0.0% |
| John McNally | Falkirk | SNP | (2019-2024) | 0.0% |
| Mr Kevin McNamara | Kingston upon Hull North | Lab | (1997-2001) | 3.2% |
| Mr Kevin McNamara | Kingston upon Hull North | Lab | (2001-2005) | 10.8% |
| Kirsty McNeill | Midlothian | Lab | (2024-present) | 0.0% |
| Lord McNicol of West Kilbride | (Lords) | Lab | (2018-present) | 0.1% |
| Tony McNulty | Harrow East | Lab | (1997-2001) | 0.3% |
| Tony McNulty | Harrow East | Lab | (2001-2005) | 1.1% |
| Tony McNulty | Harrow East | Lab | (2005-2010) | 0.8% |
| Stephen McPartland | Stevenage | Con | (2010-2015) | 2.5% |
| Stephen McPartland | Stevenage | Con | (2015-2017) | 3.3% |
| Stephen McPartland | Stevenage | Con | (2017-2019) | 1.5% |
| Stephen McPartland | Stevenage | Con | (2019-2024) | 4.7% |
| Esther McVey | Tatton | Con | (2017-2019) | 2.9% |
| Esther McVey | Tatton | Con | (2019-2024) | 6.0% |
| Esther McVey | Tatton | Con | (2024-present) | 0.0% |
| Esther McVey | Wirral West | Con | (2010-2015) | 1.3% |
| Mr Tony McWalter | Hemel Hempstead | Lab | (1997-2001) | 1.3% |
| Mr Tony McWalter | Hemel Hempstead | Lab | (2001-2005) | 3.0% |
| Mr John McWilliam | Blaydon | Lab | (1997-2001) | 1.0% |
| Mr John McWilliam | Blaydon | Lab | (2001-2005) | 1.8% |
| Baroness Meacher | (Lords) | Crossbench | (2006-present) | 19.1% |
| Michael Meacher | Oldham West and Royton | Lab | (1997-2001) | 0.0% |
| Michael Meacher | Oldham West and Royton | Lab | (2001-2005) | 1.5% |
| Michael Meacher | Oldham West and Royton | Lab | (2005-2010) | 4.4% |
| Michael Meacher | Oldham West and Royton | Lab | (2010-2015) | 1.3% |
| Michael Meacher | Oldham West and Royton | Lab | (2015-2015) | 0.0% |
| Alan Meale | Mansfield | Lab | (1997-2001) | 0.1% |
| Alan Meale | Mansfield | Lab | (2001-2005) | 2.2% |
| Alan Meale | Mansfield | Lab | (2005-2010) | 3.3% |
| Alan Meale | Mansfield | Lab | (2010-2015) | 1.6% |
| Alan Meale | Mansfield | Lab | (2015-2017) | 0.4% |
| Ian Mearns | Gateshead | Lab | (2010-2015) | 0.4% |
| Ian Mearns | Gateshead | Lab | (2015-2017) | 0.3% |
| Ian Mearns | Gateshead | Lab | (2017-2019) | 0.3% |
| Ian Mearns | Gateshead | Lab | (2019-2024) | 0.4% |
| Llinos Medi | Ynys Môn | PC | (2024-present) | 0.0% |
| Meghan Gallacher | Central Scotland | Con | (2021-present) | n/a |
| Lord Mendelsohn | (Lords) | Lab | (2013-present) | 0.4% |
| Lord Mendoza | (Lords) | Con | (2020-present) | 0.3% |
| Louise Mensch | Corby | Con | (2010-2012) | 0.7% |
| Mark Menzies | Fylde | Con | (2010-2015) | 1.0% |
| Mark Menzies | Fylde | Con | (2015-2017) | 0.0% |
| Mark Menzies | Fylde | Con | (2017-2019) | 0.7% |
| Mark Menzies | Fylde | whilst Con | (2019-2024) | 0.1% |
| Mark Menzies | Fylde | whilst Independent | (2024-2024) | n/a |
| Mercedes Villalba | North East Scotland | Lab | (2021-present) | n/a |
| Johnny Mercer | Plymouth, Moor View | Con | (2015-2017) | 0.0% |
| Johnny Mercer | Plymouth, Moor View | Con | (2017-2019) | 1.6% |
| Johnny Mercer | Plymouth, Moor View | Con | (2019-2024) | 0.6% |
| Patrick Mercer | Newark | Con | (2001-2005) | 1.0% |
| Patrick Mercer | Newark | Con | (2005-2010) | 1.6% |
| Patrick Mercer | Newark | Con | (2010-2014) | 2.3% |
| Mr Piers Merchant | Beckenham | Con | (1997-1997) | 3.2% |
| Lord Merlyn-Rees | (Lords) | Lab | (1992-2006) | 0.0% |
| Huw Merriman | Bexhill and Battle | Con | (2015-2017) | 0.2% |
| Huw Merriman | Bexhill and Battle | Con | (2017-2019) | 1.7% |
| Huw Merriman | Bexhill and Battle | Con | (2019-2024) | 1.3% |
| Baroness Merron | (Lords) | Lab | (2021-present) | 0.2% |
| Gillian Merron | Lincoln | Lab | (1997-2001) | 0.3% |
| Gillian Merron | Lincoln | Lab | (2001-2005) | 0.1% |
| Gillian Merron | Lincoln | Lab | (2005-2010) | 0.5% |
| Lord Meston | (Lords) | Crossbench | (2023-present) | 10.4% |
| Stephen Metcalfe | South Basildon and East Thurrock | Con | (2010-2015) | 1.4% |
| Stephen Metcalfe | South Basildon and East Thurrock | Con | (2015-2017) | 0.0% |
| Stephen Metcalfe | South Basildon and East Thurrock | Con | (2017-2019) | 2.4% |
| Stephen Metcalfe | South Basildon and East Thurrock | Con | (2019-2024) | 0.3% |
| Lord Methuen | (Lords) | LDem | (1994-2014) | 3.9% |
| Baroness Meyer | (Lords) | Con | (2018-present) | 1.5% |
| Michael Russell | Argyll and Bute | SNP | (2011-2016) | n/a |
| Michael Russell | Argyll and Bute | SNP | (2016-2021) | n/a |
| Michael Matheson | Central Scotland | SNP | (2003-2007) | 1.7% |
| Michael Matheson | Central Scotland | SNP | (1999-2003) | 1.7% |
| Michael Matheson | Falkirk West | SNP | (2011-2016) | n/a |
| Michael Matheson | Falkirk West | SNP | (2007-2011) | 0.2% |
| Michael Matheson | Falkirk West | SNP | (2016-2021) | n/a |
| Michael Matheson | Falkirk West | SNP | (2021-present) | n/a |
| Michael McMahon | Hamilton North and Bellshill | Lab | (2003-2007) | 0.4% |
| Michael McMahon | Hamilton North and Bellshill | Lab | (1999-2003) | 0.4% |
| Michael McMahon | Hamilton North and Bellshill | Lab | (2007-2011) | 0.3% |
| Michael Marra | North East Scotland | Lab | (2021-present) | n/a |
| Michael Russell | South of Scotland | SNP | (1999-2003) | 2.7% |
| Michael Russell | South of Scotland | SNP | (2007-2011) | 0.0% |
| Michael McMahon | Uddingston and Bellshill | Lab | (2011-2016) | n/a |
| Alun Michael | Cardiff South and Penarth | Lab | (1997-2001) | 0.3% |
| Alun Michael | Cardiff South and Penarth | Lab | (2001-2005) | 0.8% |
| Alun Michael | Cardiff South and Penarth | Lab | (2005-2010) | 0.5% |
| Alun Michael | Cardiff South and Penarth | Lab | (2010-2012) | 0.0% |
| Michelle Thomson | Falkirk East | SNP | (2021-present) | n/a |
| Michelle Ballantyne | South Scotland | whilst Con | (2017-2020) | n/a |
| Michelle Ballantyne | South Scotland | whilst Independent | (2020-2021) | n/a |
| Michelle Ballantyne | South Scotland | whilst Reform UK | (2021-2021) | n/a |
| Mr Bill Michie | Sheffield, Heeley | Lab | (1997-2001) | 3.0% |
| Baroness Michie of Gallanach | (Lords) | LDem | (2001-2008) | 0.0% |
| Mrs Ray Michie | Argyll and Bute | LDem | (1997-2001) | 2.3% |
| Anneliese Midgley | Knowsley | Lab | (2024-present) | 2.2% |
| Mike Pringle | Edinburgh South | LDem | (2003-2007) | 1.4% |
| Mike Pringle | Edinburgh South | LDem | (2007-2011) | 0.7% |
| Mike Watson | Glasgow Cathcart | whilst Independent | (2004-2005) | n/a |
| Mike Watson | Glasgow Cathcart | whilst Lab | (2003-2004) | 0.0% |
| Mike Watson | Glasgow Cathcart | Lab | (1999-2003) | 0.9% |
| Mike MacKenzie | Highlands and Islands | SNP | (2011-2016) | n/a |
| Mike Rumbles | North East Scotland | LDem | (2016-2021) | n/a |
| Mike Rumbles | West Aberdeenshire and Kincardine | LDem | (2003-2007) | 1.5% |
| Mike Rumbles | West Aberdeenshire and Kincardine | LDem | (1999-2003) | 3.3% |
| Mike Rumbles | West Aberdeenshire and Kincardine | LDem | (2007-2011) | 0.2% |
| Alan Milburn | Darlington | Lab | (1997-2001) | 0.0% |
| Alan Milburn | Darlington | Lab | (2001-2005) | 0.2% |
| Alan Milburn | Darlington | Lab | (2005-2010) | 0.4% |
| Miles Briggs | Lothian | Con | (2016-2021) | n/a |
| Miles Briggs | Lothian | Con | (2021-present) | n/a |
| David Miliband | South Shields | Lab | (2001-2005) | 0.5% |
| David Miliband | South Shields | Lab | (2005-2010) | 0.5% |
| David Miliband | South Shields | Lab | (2010-2013) | 0.0% |
| Ed Miliband | Doncaster North | Lab | (2005-2010) | 0.3% |
| Ed Miliband | Doncaster North | Lab | (2010-2015) | 0.0% |
| Ed Miliband | Doncaster North | Lab | (2015-2017) | 0.4% |
| Ed Miliband | Doncaster North | Lab | (2017-2019) | 0.3% |
| Ed Miliband | Doncaster North | Lab | (2019-2024) | 0.0% |
| Ed Miliband | Doncaster North | Lab | (2024-present) | 0.0% |
| Robin Millar | Aberconwy | Con | (2019-2024) | 1.2% |
| Andrew Miller | Ellesmere Port and Neston | Lab | (1997-2001) | 0.8% |
| Andrew Miller | Ellesmere Port and Neston | Lab | (2001-2005) | 1.5% |
| Andrew Miller | Ellesmere Port and Neston | Lab | (2005-2010) | 0.7% |
| Andrew Miller | Ellesmere Port and Neston | Lab | (2010-2015) | 0.9% |
| Calum Miller | Bicester and Woodstock | LDem | (2024-present) | 0.8% |
| Baroness Miller of Chilthorne Domer | (Lords) | LDem | (1998-present) | 2.2% |
| Baroness Miller of Hendon | (Lords) | Con | (1993-2014) | 1.3% |
| Maria Miller | Basingstoke | Con | (2005-2010) | 1.2% |
| Maria Miller | Basingstoke | Con | (2010-2015) | 1.0% |
| Maria Miller | Basingstoke | Con | (2015-2017) | 0.0% |
| Maria Miller | Basingstoke | Con | (2017-2019) | 0.9% |
| Maria Miller | Basingstoke | Con | (2019-2024) | 0.3% |
| Lord Millett | (Lords) | Crossbench | (1998-2017) | n/a |
| Amanda Milling | Cannock Chase | Con | (2015-2017) | 0.0% |
| Amanda Milling | Cannock Chase | Con | (2017-2019) | 0.2% |
| Amanda Milling | Cannock Chase | Con | (2019-2024) | 0.4% |
| Nigel Mills | Amber Valley | Con | (2010-2015) | 4.4% |
| Nigel Mills | Amber Valley | Con | (2015-2017) | 1.2% |
| Nigel Mills | Amber Valley | Con | (2017-2019) | 3.5% |
| Nigel Mills | Amber Valley | Con | (2019-2024) | 1.4% |
| John Milne | Horsham | LDem | (2024-present) | 0.0% |
| Lord Milner of Leeds | (Lords) | Lab | (1967-2003) | 0.8% |
| Anne Milton | Guildford | Con | (2005-2010) | 1.2% |
| Anne Milton | Guildford | Con | (2010-2015) | 0.2% |
| Anne Milton | Guildford | Con | (2015-2017) | 0.0% |
| Anne Milton | Guildford | whilst Con | (2017-2019) | 2.4% |
| Anne Milton | Guildford | whilst Independent | (2019-2019) | n/a |
| Julie Minns | Carlisle | Lab | (2024-present) | 1.6% |
| The Earl of Minto | (Lords) | Con | (2022-present) | 0.0% |
| Lord Mishcon | (Lords) | Lab | (1978-2006) | 5.0% |
| Navendu Mishra | Stockport | Lab | (2019-2024) | 0.0% |
| Navendu Mishra | Stockport | Lab | (2024-present) | 0.0% |
| Lord Mitchell | (Lords) | Lab | (2000-present) | 1.5% |
| Andrew Mitchell | Sutton Coldfield | Con | (2001-2005) | 0.8% |
| Andrew Mitchell | Sutton Coldfield | Con | (2005-2010) | 2.3% |
| Andrew Mitchell | Sutton Coldfield | Con | (2010-2015) | 0.9% |
| Andrew Mitchell | Sutton Coldfield | Con | (2015-2017) | 0.6% |
| Andrew Mitchell | Sutton Coldfield | Con | (2017-2019) | 3.1% |
| Andrew Mitchell | Sutton Coldfield | Con | (2019-2024) | 1.7% |
| Andrew Mitchell | Sutton Coldfield | Con | (2024-present) | 3.5% |
| Austin Mitchell | Great Grimsby | Lab | (1997-2001) | 3.2% |
| Austin Mitchell | Great Grimsby | Lab | (2001-2005) | 4.7% |
| Austin Mitchell | Great Grimsby | Lab | (2005-2010) | 7.1% |
| Austin Mitchell | Great Grimsby | Lab | (2010-2015) | 1.4% |
| Baroness Mobarik | (Lords) | Con | (2014-present) | 1.7% |
| Anne Moffat | East Lothian | Lab | (2005-2010) | 0.9% |
| Laura Moffatt | Crawley | Lab | (1997-2001) | 0.2% |
| Laura Moffatt | Crawley | Lab | (2001-2005) | 0.5% |
| Laura Moffatt | Crawley | Lab | (2005-2010) | 0.5% |
| Lord Mogg | (Lords) | Crossbench | (2008-2019) | 6.7% |
| Abtisam Mohamed | Sheffield Central | Lab | (2024-present) | 0.7% |
| Iqbal Mohamed | Dewsbury and Batley | Independent | (2024-present) | n/a |
| Gagan Mohindra | South West Hertfordshire | Con | (2019-2024) | 0.3% |
| Gagan Mohindra | South West Hertfordshire | Con | (2024-present) | 0.0% |
| Chris Mole | Ipswich | Lab | (2001-2005) | 1.1% |
| Chris Mole | Ipswich | Lab | (2005-2010) | 0.8% |
| Lord Molloy | (Lords) | Lab | (1981-2001) | 2.3% |
| Francie Molloy | Mid Ulster | SF | (2013-2015) | n/a |
| Francie Molloy | Mid Ulster | SF | (2015-2017) | n/a |
| Francie Molloy | Mid Ulster | SF | (2017-2019) | n/a |
| Francie Molloy | Mid Ulster | SF | (2019-2024) | n/a |
| Lord Molyneaux of Killead | (Lords) | Crossbench | (1997-2015) | 29.5% |
| Carol Monaghan | Glasgow North West | SNP | (2015-2017) | 0.3% |
| Carol Monaghan | Glasgow North West | SNP | (2017-2019) | 0.0% |
| Carol Monaghan | Glasgow North West | SNP | (2019-2024) | 0.0% |
| Paul Monaghan | Caithness, Sutherland and Easter Ross | SNP | (2015-2017) | 0.0% |
| Baroness Monckton of Dallington Forest | (Lords) | Con | (2024-present) | 1.4% |
| Baroness Mone | (Lords) | Con | (2015-present) | 0.4% |
| Monica Lennon | Central Scotland | Lab | (2016-2021) | n/a |
| Monica Lennon | Central Scotland | Lab | (2021-present) | n/a |
| Lord Monks | (Lords) | Lab | (2010-present) | 0.4% |
| Lord Monro of Langholm | (Lords) | Con | (1997-2006) | 0.5% |
| Lord Monson | (Lords) | Crossbench | (1958-2011) | 24.2% |
| Lord Montagu of Beaulieu | (Lords) | Con | (1947-2015) | 2.5% |
| Viscount Montgomery of Alamein | (Lords) | Crossbench | (2005-2015) | 28.3% |
| The Duke of Montrose | (Lords) | Con | (1992-present) | 0.9% |
| Lord Moonie | (Lords) | Lab | (2005-2019) | 2.4% |
| Lord Moonie | (Lords) | Non-affiliated | (2019-2022) | 0.0% |
| Dr Lewis Moonie | Kirkcaldy | Lab | (1997-2001) | 0.5% |
| Dr Lewis Moonie | Kirkcaldy | Lab | (2001-2005) | 1.7% |
| Madeleine Moon | Bridgend | Lab | (2005-2010) | 0.2% |
| Madeleine Moon | Bridgend | Lab | (2010-2015) | 0.5% |
| Madeleine Moon | Bridgend | Lab | (2015-2017) | 1.5% |
| Madeleine Moon | Bridgend | Lab | (2017-2019) | 0.3% |
| Perran Moon | Camborne and Redruth | Lab | (2024-present) | 0.0% |
| Damien Moore | Southport | Con | (2017-2019) | 1.7% |
| Damien Moore | Southport | Con | (2019-2024) | 0.5% |
| Lord Moore of Etchingham | (Lords) | Non-affiliated | (2020-present) | 72.2% |
| Lord Moore of Lower Marsh | (Lords) | Con | (1992-2019) | 1.1% |
| Michael Moore | Berwickshire, Roxburgh and Selkirk | LDem | (2005-2010) | 0.8% |
| Michael Moore | Berwickshire, Roxburgh and Selkirk | LDem | (2010-2015) | 0.5% |
| Michael Moore | Tweeddale, Ettrick and Lauderdale | LDem | (1997-2001) | 1.7% |
| Michael Moore | Tweeddale, Ettrick and Lauderdale | LDem | (2001-2005) | 2.4% |
| Robbie Moore | Keighley | Con | (2019-2024) | 0.4% |
| Robbie Moore | Keighley and Ilkley | Con | (2024-present) | 0.7% |
| Lord Moore of Wolvercote | (Lords) | Crossbench | (1986-2009) | 18.2% |
| Lord Moran | (Lords) | Crossbench | (1977-2014) | 12.6% |
| Layla Moran | Oxford West and Abingdon | LDem | (2017-2019) | 0.6% |
| Layla Moran | Oxford West and Abingdon | LDem | (2019-2024) | 0.0% |
| Layla Moran | Oxford West and Abingdon | LDem | (2024-present) | 0.9% |
| Margaret Moran | Luton South | Lab | (1997-2001) | 0.3% |
| Margaret Moran | Luton South | Lab | (2001-2005) | 0.2% |
| Margaret Moran | Luton South | Lab | (2005-2010) | 0.0% |
| Penny Mordaunt | Portsmouth North | Con | (2010-2015) | 1.0% |
| Penny Mordaunt | Portsmouth North | Con | (2015-2017) | 0.0% |
| Penny Mordaunt | Portsmouth North | Con | (2017-2019) | 0.7% |
| Penny Mordaunt | Portsmouth North | Con | (2019-2024) | 0.3% |
| Jessica Morden | Newport East | Lab | (2005-2010) | 0.1% |
| Jessica Morden | Newport East | Lab | (2010-2015) | 0.1% |
| Jessica Morden | Newport East | Lab | (2015-2017) | 0.0% |
| Jessica Morden | Newport East | Lab | (2017-2019) | 0.0% |
| Jessica Morden | Newport East | Lab | (2019-2024) | 0.2% |
| Jessica Morden | Newport East | Lab | (2024-present) | 0.0% |
| Edward Morello | West Dorset | LDem | (2024-present) | 0.0% |
| Lord Morgan | (Lords) | Lab | (2000-present) | 4.0% |
| Alasdair Morgan | Galloway and Upper Nithsdale | SNP | (1997-2001) | 0.9% |
| Baroness Morgan of Cotes | (Lords) | Con | (2020-present) | 1.3% |
| Baroness Morgan of Drefelin | (Lords) | Crossbench | (2011-present) | 16.9% |
| Baroness Morgan of Drefelin | (Lords) | Lab | (2004-2011) | 0.3% |
| Baroness Morgan of Ely | (Lords) | Lab | (2011-present) | 0.4% |
| Helen Morgan | North Shropshire | LDem | (2021-2024) | 0.0% |
| Helen Morgan | North Shropshire | LDem | (2024-present) | 0.7% |
| Baroness Morgan of Huyton | (Lords) | Lab | (2001-present) | 0.3% |
| Julie Morgan | Cardiff North | Lab | (1997-2001) | 1.7% |
| Julie Morgan | Cardiff North | Lab | (2001-2005) | 2.9% |
| Julie Morgan | Cardiff North | Lab | (2005-2010) | 1.4% |
| Nicky Morgan | Loughborough | Con | (2010-2015) | 0.7% |
| Nicky Morgan | Loughborough | Con | (2015-2017) | 0.3% |
| Nicky Morgan | Loughborough | Con | (2017-2019) | 7.0% |
| Mr Rhodri Morgan | Cardiff West | Lab | (1997-2001) | 0.0% |
| Stephen Morgan | Portsmouth South | Lab | (2017-2019) | 0.5% |
| Stephen Morgan | Portsmouth South | Lab | (2019-2024) | 0.0% |
| Stephen Morgan | Portsmouth South | Lab | (2024-present) | 0.0% |
| Elliot Morley | Scunthorpe | Lab | (1997-2001) | 0.6% |
| Elliot Morley | Scunthorpe | Lab | (2001-2005) | 0.8% |
| Elliot Morley | Scunthorpe | Lab | (2005-2010) | 0.6% |
| Graeme Morrice | Livingston | Lab | (2010-2015) | 0.1% |
| Lord Morris of Aberavon | (Lords) | Lab | (2001-2023) | 2.5% |
| Anne Marie Morris | Newton Abbot | Con | (2010-2015) | 1.2% |
| Anne Marie Morris | Newton Abbot | Con | (2015-2017) | 0.0% |
| Anne Marie Morris | Newton Abbot | Con | (2017-2019) | 4.3% |
| Anne Marie Morris | Newton Abbot | Con | (2019-2024) | 3.5% |
| Baroness Morris of Bolton | (Lords) | Con | (2004-present) | 0.5% |
| Lord Morris of Castle Morris | (Lords) | Lab | (1990-2001) | 0.8% |
| David Morris | Morecambe and Lunesdale | Con | (2010-2015) | 1.7% |
| David Morris | Morecambe and Lunesdale | Con | (2015-2017) | 0.0% |
| David Morris | Morecambe and Lunesdale | Con | (2017-2019) | 1.2% |
| David Morris | Morecambe and Lunesdale | Con | (2019-2024) | 0.2% |
| Ms Estelle Morris | Birmingham, Yardley | Lab | (1997-2001) | 0.2% |
| Ms Estelle Morris | Birmingham, Yardley | Lab | (2001-2005) | 0.4% |
| Grahame Morris | Easington | Lab | (2010-2015) | 1.1% |
| Grahame Morris | Easington | Lab | (2015-2017) | 0.8% |
| Grahame Morris | Easington | Lab | (2017-2019) | 2.4% |
| Grahame Morris | Easington | Lab | (2019-2024) | 0.4% |
| Grahame Morris | Easington | Lab | (2024-present) | 1.8% |
| Lord Morris of Handsworth | (Lords) | Lab | (2006-2020) | 0.7% |
| James Morris | Halesowen and Rowley Regis | Con | (2010-2015) | 1.2% |
| James Morris | Halesowen and Rowley Regis | Con | (2015-2017) | 0.0% |
| James Morris | Halesowen and Rowley Regis | Con | (2017-2019) | 0.5% |
| James Morris | Halesowen and Rowley Regis | Con | (2019-2024) | 0.1% |
| Joe Morris | Hexham | Lab | (2024-present) | 0.0% |
| Sir John Morris | Aberavon | Lab | (1997-2001) | 0.9% |
| Lord Morris of Manchester | (Lords) | Lab | (1997-2012) | 2.0% |
| Tom Morrison | Cheadle | LDem | (2024-present) | 0.8% |
| Baroness Morrissey | (Lords) | Con | (2020-present) | 4.3% |
| Joy Morrissey | Beaconsfield | Con | (2019-2024) | 0.3% |
| Joy Morrissey | Beaconsfield | Con | (2024-present) | 0.0% |
| Baroness Morris of Yardley | (Lords) | Lab | (2005-present) | 0.9% |
| Lord Morrow | (Lords) | DUP | (2006-present) | 0.4% |
| Lord Morse | (Lords) | Crossbench | (2021-present) | 40.0% |
| Jill Mortimer | Hartlepool | Con | (2021-2024) | 1.0% |
| Wendy Morton | Aldridge-Brownhills | Con | (2015-2017) | 0.0% |
| Wendy Morton | Aldridge-Brownhills | Con | (2017-2019) | 0.7% |
| Wendy Morton | Aldridge-Brownhills | Con | (2019-2024) | 0.1% |
| Wendy Morton | Aldridge-Brownhills | Con | (2024-present) | 0.0% |
| Lord Moser | (Lords) | Crossbench | (2001-2015) | 37.4% |
| Stephen Mosley | City of Chester | Con | (2010-2015) | 1.5% |
| Malcolm Moss | North East Cambridgeshire | Con | (1997-2001) | 0.1% |
| Malcolm Moss | North East Cambridgeshire | Con | (2001-2005) | 0.2% |
| Malcolm Moss | North East Cambridgeshire | Con | (2005-2010) | 0.6% |
| Lord Mott | (Lords) | Con | (2023-present) | 0.0% |
| Lord Mountevans | (Lords) | Crossbench | (2015-present) | 31.3% |
| Kali Mountford | Colne Valley | Lab | (1997-2001) | 0.1% |
| Kali Mountford | Colne Valley | Lab | (2001-2005) | 1.1% |
| Kali Mountford | Colne Valley | Lab | (2005-2010) | 0.3% |
| David Mowat | Warrington South | Con | (2010-2015) | 1.0% |
| David Mowat | Warrington South | Con | (2015-2017) | 0.0% |
| Lord Mowbray and Stourton | (Lords) | Con | (1965-2006) | 0.7% |
| Dr Mo Mowlam | Redcar | Lab | (1997-2001) | 0.4% |
| Lord Moylan | (Lords) | Con | (2020-present) | 1.6% |
| Lord Moynihan | (Lords) | Con | (1997-present) | 1.8% |
| Lord Moynihan of Chelsea | (Lords) | Con | (2024-present) | 0.0% |
| Baroness Moyo | (Lords) | Con | (2022-present) | 0.0% |
| Lord Moyola | (Lords) | Con | (1971-2002) | n/a |
| George Mudie | Leeds East | Lab | (1997-2001) | 0.3% |
| George Mudie | Leeds East | Lab | (2001-2005) | 4.0% |
| George Mudie | Leeds East | Lab | (2005-2010) | 4.1% |
| George Mudie | Leeds East | Lab | (2010-2015) | 2.9% |
| Greg Mulholland | Leeds North West | LDem | (2005-2010) | 2.4% |
| Greg Mulholland | Leeds North West | LDem | (2010-2015) | 7.9% |
| Greg Mulholland | Leeds North West | LDem | (2015-2017) | 0.0% |
| Margaret Mullane | Dagenham and Rainham | Lab | (2024-present) | 2.2% |
| Kieran Mullan | Bexhill and Battle | Con | (2024-present) | 0.0% |
| Kieran Mullan | Crewe and Nantwich | Con | (2019-2024) | 0.4% |
| Chris Mullin | Sunderland South | Lab | (1997-2001) | 1.1% |
| Chris Mullin | Sunderland South | Lab | (2001-2005) | 2.4% |
| Chris Mullin | Sunderland South | Lab | (2005-2010) | 2.1% |
| Roger Mullin | Kirkcaldy and Cowdenbeath | SNP | (2015-2017) | 0.0% |
| Holly Mumby-Croft | Scunthorpe | Con | (2019-2024) | 1.1% |
| David Mundell | Dumfriesshire, Clydesdale and Tweeddale | Con | (2005-2010) | 0.9% |
| David Mundell | Dumfriesshire, Clydesdale and Tweeddale | Con | (2010-2015) | 0.5% |
| David Mundell | Dumfriesshire, Clydesdale and Tweeddale | Con | (2015-2017) | 0.0% |
| David Mundell | Dumfriesshire, Clydesdale and Tweeddale | Con | (2017-2019) | 1.0% |
| David Mundell | Dumfriesshire, Clydesdale and Tweeddale | Con | (2019-2024) | 0.4% |
| David Mundell | Dumfriesshire, Clydesdale and Tweeddale | Con | (2024-present) | 0.0% |
| Meg Munn | Sheffield, Heeley | Lab | (2001-2005) | 0.5% |
| Meg Munn | Sheffield, Heeley | Lab | (2005-2010) | 0.8% |
| Meg Munn | Sheffield, Heeley | Lab | (2010-2015) | 0.9% |
| Tessa Munt | Wells | LDem | (2010-2015) | 1.0% |
| Tessa Munt | Wells and Mendip Hills | LDem | (2024-present) | 0.0% |
| Murdo Fraser | Mid Scotland and Fife | Con | (2011-2016) | n/a |
| Murdo Fraser | Mid Scotland and Fife | Con | (2003-2007) | 0.5% |
| Murdo Fraser | Mid Scotland and Fife | Con | (2001-2003) | 0.3% |
| Murdo Fraser | Mid Scotland and Fife | Con | (2007-2011) | 0.0% |
| Murdo Fraser | Mid Scotland and Fife | Con | (2016-2021) | n/a |
| Murdo Fraser | Mid Scotland and Fife | Con | (2021-present) | n/a |
| Baroness Murphy | (Lords) | Crossbench | (2004-present) | 27.1% |
| Conor Murphy | Newry and Armagh | SF | (2005-2010) | n/a |
| Conor Murphy | Newry and Armagh | SF | (2010-2015) | n/a |
| Denis Murphy | Wansbeck | Lab | (1997-2001) | 0.7% |
| Denis Murphy | Wansbeck | Lab | (2001-2005) | 1.6% |
| Denis Murphy | Wansbeck | Lab | (2005-2010) | 2.6% |
| Jim Murphy | East Renfrewshire | Lab | (1997-2001) | 0.3% |
| Jim Murphy | East Renfrewshire | Lab | (2001-2005) | 1.1% |
| Jim Murphy | East Renfrewshire | Lab | (2005-2010) | 1.2% |
| Jim Murphy | East Renfrewshire | Lab | (2010-2015) | 0.0% |
| Luke Murphy | Basingstoke | Lab | (2024-present) | 0.0% |
| Paul Murphy | Torfaen | Lab | (1997-2001) | 0.6% |
| Paul Murphy | Torfaen | Lab | (2001-2005) | 0.8% |
| Paul Murphy | Torfaen | Lab | (2005-2010) | 1.7% |
| Paul Murphy | Torfaen | Lab | (2010-2015) | 0.7% |
| Lord Murphy of Torfaen | (Lords) | Lab | (2015-present) | 0.7% |
| Murray Tosh | South of Scotland | Con | (1999-2003) | 3.8% |
| Murray Tosh | West of Scotland | Con | (2003-2007) | 2.0% |
| Lord Murray of Blidworth | (Lords) | Con | (2022-present) | 0.0% |
| Chris Murray | Edinburgh East and Musselburgh | Lab | (2024-present) | 0.0% |
| Lord Murray of Epping Forest | (Lords) | Lab | (1985-2004) | 3.1% |
| Ian Murray | Edinburgh South | Lab | (2010-2015) | 0.2% |
| Ian Murray | Edinburgh South | Lab | (2015-2017) | 1.9% |
| Ian Murray | Edinburgh South | Lab | (2017-2019) | 0.8% |
| Ian Murray | Edinburgh South | Lab | (2019-2024) | 0.0% |
| Ian Murray | Edinburgh South | Lab | (2024-present) | 0.0% |
| James Murray | Ealing North | Lab | (2019-2024) | 0.0% |
| James Murray | Ealing North | Lab | (2024-present) | 0.0% |
| Katrina Murray | Cumbernauld and Kirkintilloch | Lab | (2024-present) | 2.6% |
| Sheryll Murray | South East Cornwall | Con | (2010-2015) | 1.2% |
| Sheryll Murray | South East Cornwall | Con | (2015-2017) | 0.0% |
| Sheryll Murray | South East Cornwall | Con | (2017-2019) | 2.3% |
| Sheryll Murray | South East Cornwall | Con | (2019-2024) | 0.2% |
| Susan Murray | Mid Dunbartonshire | LDem | (2024-present) | 0.0% |
| Andrew Murrison | South West Wiltshire | Con | (2010-2015) | 0.4% |
| Andrew Murrison | South West Wiltshire | Con | (2015-2017) | 0.0% |
| Andrew Murrison | South West Wiltshire | Con | (2017-2019) | 0.5% |
| Andrew Murrison | South West Wiltshire | Con | (2019-2024) | 0.0% |
| Andrew Murrison | South West Wiltshire | Con | (2024-present) | 2.1% |
| Andrew Murrison | Westbury | Con | (2001-2005) | 2.0% |
| Andrew Murrison | Westbury | Con | (2005-2010) | 1.6% |
| Lord Murton of Lindisfarne | (Lords) | Con | (1979-2009) | 0.7% |
| Lord Mustill | (Lords) | Crossbench | (1992-2015) | n/a |
| Luke Myer | Middlesbrough South and East Cleveland | Lab | (2024-present) | 0.5% |
| Lord Myners | (Lords) | Crossbench | (2015-2022) | 9.1% |
| Lord Myners | (Lords) | Lab | (2008-2014) | 0.7% |
| Lord Myners | (Lords) | Non-affiliated | (2014-2015) | n/a |
| James Naish | Rushcliffe | Lab | (2024-present) | 0.6% |
| Connor Naismith | Crewe and Nantwich | Lab | (2024-present) | 0.5% |
| Lisa Nandy | Wigan | Lab | (2010-2015) | 0.0% |
| Lisa Nandy | Wigan | Lab | (2015-2017) | 0.5% |
| Lisa Nandy | Wigan | Lab | (2017-2019) | 0.6% |
| Lisa Nandy | Wigan | Lab | (2019-2024) | 0.0% |
| Lisa Nandy | Wigan | Lab | (2024-present) | 0.0% |
| Nanette Milne | North East Scotland | Con | (2011-2016) | n/a |
| Nanette Milne | North East Scotland | Con | (2003-2007) | 0.6% |
| Nanette Milne | North East Scotland | Con | (2007-2011) | 0.3% |
| Kanishka Narayan | Vale of Glamorgan | Lab | (2024-present) | 0.6% |
| Lord Naseby | (Lords) | Con | (1997-present) | 1.5% |
| Lord Nash | (Lords) | Con | (2013-present) | 0.7% |
| Pamela Nash | Airdrie and Shotts | Lab | (2010-2015) | 0.5% |
| Pamela Nash | Motherwell, Wishaw and Carluke | Lab | (2024-present) | 0.0% |
| Natalie Don | Renfrewshire North and West | SNP | (2021-present) | n/a |
| Doug Naysmith | Bristol North West | Lab | (1997-2001) | 0.9% |
| Doug Naysmith | Bristol North West | Lab | (2001-2005) | 1.8% |
| Doug Naysmith | Bristol North West | Lab | (2005-2010) | 1.7% |
| Neil Gray | Airdrie and Shotts | SNP | (2021-present) | n/a |
| Neil Findlay | Lothian | Lab | (2011-2016) | n/a |
| Neil Findlay | Lothian | Lab | (2016-2021) | n/a |
| Neil Bibby | West Scotland | Lab | (2011-2016) | n/a |
| Neil Bibby | West Scotland | Lab | (2016-2021) | n/a |
| Neil Bibby | West Scotland | Lab | (2021-present) | n/a |
| Lord Neill of Bladen | (Lords) | Crossbench | (1997-2016) | 13.8% |
| Bob Neill | Bromley and Chislehurst | Con | (2006-2010) | 0.2% |
| Bob Neill | Bromley and Chislehurst | Con | (2010-2015) | 1.1% |
| Bob Neill | Bromley and Chislehurst | Con | (2015-2017) | 0.3% |
| Bob Neill | Bromley and Chislehurst | Con | (2017-2019) | 5.4% |
| Bob Neill | Bromley and Chislehurst | Con | (2019-2024) | 3.3% |
| Baroness Neuberger | (Lords) | Crossbench | (2011-present) | 5.4% |
| Baroness Neuberger | (Lords) | LDem | (2004-2011) | 1.3% |
| Lord Neuberger of Abbotsbury | (Lords) | Judge | (2007-present) | 12.5% |
| Baroness Neville-Jones | (Lords) | Con | (2007-present) | 2.7% |
| Baroness Neville-Rolfe | (Lords) | Con | (2013-present) | 1.0% |
| Josh Newbury | Cannock Chase | Lab | (2024-present) | 1.5% |
| Lord Newby | (Lords) | LDem | (1997-present) | 0.8% |
| The Bishop of Newcastle | (Lords) | Bishop | (2002-2014) | 3.6% |
| The Bishop of Newcastle | (Lords) | Bishop | (2016-2021) | 6.7% |
| The Bishop of Newcastle | (Lords) | Bishop | (2023-present) | 0.0% |
| Gavin Newlands | Paisley and Renfrewshire North | SNP | (2015-2017) | 0.3% |
| Gavin Newlands | Paisley and Renfrewshire North | SNP | (2017-2019) | 0.3% |
| Gavin Newlands | Paisley and Renfrewshire North | SNP | (2019-2024) | 0.1% |
| Baroness Newlove | (Lords) | Con | (2010-present) | 3.3% |
| Brooks Newmark | Braintree | Con | (2005-2010) | 1.2% |
| Brooks Newmark | Braintree | Con | (2010-2015) | 0.6% |
| Lord Newton of Braintree | (Lords) | Con | (1997-2012) | 4.9% |
| Sarah Newton | Truro and Falmouth | Con | (2010-2015) | 1.1% |
| Sarah Newton | Truro and Falmouth | Con | (2015-2017) | 0.0% |
| Sarah Newton | Truro and Falmouth | Con | (2017-2019) | 3.5% |
| Samantha Niblett | South Derbyshire | Lab | (2024-present) | 0.0% |
| Lord Nicholls of Birkenhead | (Lords) | Crossbench | (1994-2017) | 0.0% |
| Mr Patrick Nicholls | Teignbridge | Con | (1997-2001) | 0.1% |
| Charlotte Nichols | Warrington North | Lab | (2019-2024) | 0.0% |
| Charlotte Nichols | Warrington North | Lab | (2024-present) | 0.0% |
| Baroness Nicholson of Winterbourne | (Lords) | Con | (2016-present) | 1.3% |
| Baroness Nicholson of Winterbourne | (Lords) | LDem | (1997-2016) | 8.5% |
| Baroness Nicholson of Winterbourne | (Lords) | Non-affiliated | (2016-2016) | n/a |
| Lia Nici | Great Grimsby | Con | (2019-2024) | 1.0% |
| Nick Johnston | Mid Scotland and Fife | Con | (1999-2001) | 0.5% |
| Lord Nickson | (Lords) | Crossbench | (1994-2015) | 22.4% |
| Baroness Nicol | (Lords) | Lab | (1983-2018) | 0.6% |
| Nicol Stephen | Aberdeen South | LDem | (1999-2003) | 2.5% |
| Nicol Stephen | Aberdeen South | LDem | (2003-2007) | 0.1% |
| Lord Nicol Ross [Missing last name for 80392] | Aberdeen South | LDem | (2007-2011) | 0.6% |
| Nicola Sturgeon | Glasgow | SNP | (2003-2007) | 0.6% |
| Nicola Sturgeon | Glasgow | SNP | (1999-2003) | 1.1% |
| Nicola Sturgeon | Glasgow Govan | SNP | (2007-2011) | 0.0% |
| Nicola Sturgeon | Glasgow Southside | SNP | (2011-2016) | n/a |
| Nicola Sturgeon | Glasgow Southside | SNP | (2016-2021) | n/a |
| Nicola Sturgeon | Glasgow Southside | SNP | (2021-present) | n/a |
| John Nicolson | East Dunbartonshire | SNP | (2015-2017) | 0.0% |
| John Nicolson | Ochil and South Perthshire | SNP | (2019-2024) | 0.0% |
| Nigel Don | Angus North and Mearns | SNP | (2011-2016) | n/a |
| Nigel Don | North East Scotland | SNP | (2007-2011) | 0.0% |
| Baroness Noakes | (Lords) | Con | (2000-present) | 1.4% |
| Caroline Nokes | Romsey and Southampton North | Con | (2010-2015) | 1.5% |
| Caroline Nokes | Romsey and Southampton North | Con | (2015-2017) | 0.2% |
| Caroline Nokes | Romsey and Southampton North | whilst Con | (2017-2019) | 1.0% |
| Caroline Nokes | Romsey and Southampton North | Con | (2019-2024) | 4.2% |
| Caroline Nokes | Romsey and Southampton North | Con | (2024-present) | 0.0% |
| Caroline Nokes | Romsey and Southampton North | whilst Independent | (2019-2019) | n/a |
| Lord Nolan | (Lords) | Crossbench | (1994-2007) | 0.0% |
| Lord Noon | (Lords) | Lab | (2011-2015) | 0.8% |
| Nora Radcliffe | Gordon | LDem | (2003-2007) | 0.1% |
| Nora Radcliffe | Gordon | LDem | (1999-2003) | 1.3% |
| The Duke of Norfolk | (Lords) | Con | (1971-2002) | 0.0% |
| The Duke of Norfolk | (Lords) | Crossbench | (2003-2012) | 0.0% |
| The Duke of Norfolk | (Lords) | Non-affiliated | (2012-present) | 100.0% |
| The Duke of Norfolk | (Lords) | Other | (2003-2003) | n/a |
| Mr Archie Norman | Tunbridge Wells | Con | (1997-2001) | 0.0% |
| Mr Archie Norman | Tunbridge Wells | Con | (2001-2005) | 2.2% |
| Jesse Norman | Hereford and South Herefordshire | Con | (2010-2015) | 0.1% |
| Jesse Norman | Hereford and South Herefordshire | Con | (2015-2017) | 0.0% |
| Jesse Norman | Hereford and South Herefordshire | Con | (2017-2019) | 0.5% |
| Jesse Norman | Hereford and South Herefordshire | Con | (2019-2024) | 0.3% |
| Jesse Norman | Hereford and South Herefordshire | Con | (2024-present) | 0.0% |
| Alex Norris | Nottingham North | Lab | (2017-2019) | 0.3% |
| Alex Norris | Nottingham North | Lab | (2019-2024) | 0.0% |
| Alex Norris | Nottingham North and Kimberley | Lab | (2024-present) | 0.0% |
| Dan Norris | North East Somerset and Hanham | Lab | (2024-present) | 0.0% |
| Dan Norris | Wansdyke | Lab | (1997-2001) | 0.1% |
| Dan Norris | Wansdyke | Lab | (2001-2005) | 1.6% |
| Dan Norris | Wansdyke | Lab | (2005-2010) | 0.8% |
| Lord Northbourne | (Lords) | Crossbench | (1982-2018) | 24.2% |
| Lord Northbrook | (Lords) | Con | (1990-present) | 5.7% |
| The Earl of Northesk | (Lords) | Con | (1994-2010) | 0.3% |
| Lord Northfield | (Lords) | Lab | (1976-2013) | 0.0% |
| Baroness Northover | (Lords) | LDem | (2000-present) | 0.8% |
| Lord Norton of Louth | (Lords) | Con | (1998-present) | 3.8% |
| The Bishop of Norwich | (Lords) | Bishop | (2004-2019) | 5.9% |
| The Bishop of Norwich | (Lords) | Bishop | (2023-present) | 0.0% |
| David Nuttall | Bury North | Con | (2010-2015) | 17.0% |
| David Nuttall | Bury North | Con | (2015-2017) | 7.1% |
| Baroness Nye | (Lords) | Lab | (2010-present) | 0.2% |
| Mr Bill O'Brien | Normanton | Lab | (1997-2001) | 0.8% |
| Mr Bill O'Brien | Normanton | Lab | (2001-2005) | 1.6% |
| Mike O'Brien | North Warwickshire | Lab | (1997-2001) | 0.1% |
| Mike O'Brien | North Warwickshire | Lab | (2001-2005) | 1.4% |
| Mike O'Brien | North Warwickshire | Lab | (2005-2010) | 1.2% |
| Neil O'Brien | Harborough | Con | (2017-2019) | 0.2% |
| Neil O'Brien | Harborough | Con | (2019-2024) | 0.4% |
| Neil O'Brien | Harborough, Oadby and Wigston | Con | (2024-present) | 0.0% |
| Stephen O'Brien | Eddisbury | Con | (2010-2015) | 0.4% |
| Stephen O'Brien | Eddisbury | Con | (1999-2001) | 0.2% |
| Stephen O'Brien | Eddisbury | Con | (2001-2005) | 0.1% |
| Stephen O'Brien | Eddisbury | Con | (2005-2010) | 0.4% |
| Baroness O'Cathain | (Lords) | Con | (1991-2021) | 1.9% |
| Lord O'Donnell | (Lords) | Crossbench | (2012-present) | 5.0% |
| Fiona O'Donnell | East Lothian | Lab | (2010-2015) | 0.2% |
| Baroness O'Grady of Upper Holloway | (Lords) | Lab | (2022-present) | 0.0% |
| Brendan O'Hara | Argyll and Bute | SNP | (2015-2017) | 0.3% |
| Brendan O'Hara | Argyll and Bute | SNP | (2017-2019) | 0.0% |
| Brendan O'Hara | Argyll and Bute | SNP | (2019-2024) | 0.0% |
| Brendan O'Hara | Argyll, Bute and South Lochaber | SNP | (2024-present) | 1.3% |
| Edward O'Hara | Knowsley South | Lab | (1997-2001) | 1.2% |
| Edward O'Hara | Knowsley South | Lab | (2001-2005) | 1.3% |
| Edward O'Hara | Knowsley South | Lab | (2005-2010) | 0.9% |
| Baroness O'Loan | (Lords) | Crossbench | (2009-present) | 20.8% |
| Jared O'Mara | Sheffield, Hallam | whilst Independent | (2017-2019) | n/a |
| Jared O'Mara | Sheffield, Hallam | whilst Lab | (2017-2017) | 0.0% |
| Baroness O'Neill of Bengarve | (Lords) | Crossbench | (1999-present) | 16.9% |
| Baroness O'Neill of Bexley | (Lords) | Con | (2022-present) | 0.0% |
| Lord O'Neill of Clackmannan | (Lords) | Lab | (2005-2020) | 0.4% |
| Lord O'Neill of Gatley | (Lords) | Con | (2015-2016) | 0.0% |
| Lord O'Neill of Gatley | (Lords) | Crossbench | (2017-present) | 12.5% |
| Lord O'Neill of Gatley | (Lords) | Non-affiliated | (2016-2017) | n/a |
| Mr Martin O'Neill | Ochil | Lab | (1997-2001) | 0.5% |
| Mr Martin O'Neill | Ochil | Lab | (2001-2005) | 1.9% |
| Lord O'Shaughnessy | (Lords) | Con | (2015-present) | 0.2% |
| Lord Oakeshott of Seagrove Bay | (Lords) | LDem | (2000-2014) | 2.5% |
| Lord Oakeshott of Seagrove Bay | (Lords) | Non-affiliated | (2014-present) | 10.0% |
| Mark Oaten | Winchester | LDem | (1997-1997) | 0.0% |
| Mark Oaten | Winchester | LDem | (1997-2001) | 1.9% |
| Mark Oaten | Winchester | LDem | (2001-2005) | 3.4% |
| Mark Oaten | Winchester | LDem | (2005-2010) | 1.5% |
| Lord Oates | (Lords) | LDem | (2015-present) | 0.1% |
| Ben Obese-Jecty | Huntingdon | Con | (2024-present) | 0.7% |
| Lord Offord of Garvel | (Lords) | Con | (2021-present) | 0.0% |
| Matthew Offord | Hendon | Con | (2010-2015) | 3.7% |
| Matthew Offord | Hendon | Con | (2015-2017) | 0.0% |
| Matthew Offord | Hendon | Con | (2017-2019) | 1.4% |
| Matthew Offord | Hendon | Con | (2019-2024) | 3.3% |
| Oliver Mundell | Dumfriesshire | Con | (2016-2021) | n/a |
| Oliver Mundell | Dumfriesshire | Con | (2021-present) | n/a |
| Lord Oliver of Aylmerton | (Lords) | Crossbench | (1986-2007) | 0.0% |
| Eric Ollerenshaw | Lancaster and Fleetwood | Con | (2010-2015) | 0.9% |
| Bill Olner | Nuneaton | Lab | (1997-2001) | 0.6% |
| Bill Olner | Nuneaton | Lab | (2001-2005) | 1.2% |
| Bill Olner | Nuneaton | Lab | (2005-2010) | 0.7% |
| Sarah Olney | Richmond Park | LDem | (2016-2017) | 0.0% |
| Sarah Olney | Richmond Park | LDem | (2019-2024) | 0.0% |
| Sarah Olney | Richmond Park | LDem | (2024-present) | 2.5% |
| Fiona Onasanya | Peterborough | whilst Independent | (2019-2019) | n/a |
| Fiona Onasanya | Peterborough | whilst Lab | (2017-2019) | 2.3% |
| Melanie Onn | Great Grimsby | Lab | (2015-2017) | 0.3% |
| Melanie Onn | Great Grimsby | Lab | (2017-2019) | 1.1% |
| Melanie Onn | Great Grimsby and Cleethorpes | Lab | (2024-present) | 0.6% |
| The Earl of Onslow | (Lords) | Con | (1971-2011) | 5.1% |
| Lord Onslow of Woking | (Lords) | Con | (1997-2001) | 0.0% |
| Chi Onwurah | Newcastle upon Tyne Central | Lab | (2010-2015) | 0.2% |
| Chi Onwurah | Newcastle upon Tyne Central | Lab | (2015-2017) | 0.9% |
| Chi Onwurah | Newcastle upon Tyne Central | Lab | (2017-2019) | 0.0% |
| Chi Onwurah | Newcastle upon Tyne Central | Lab | (2019-2024) | 0.0% |
| Chi Onwurah | Newcastle upon Tyne Central and West | Lab | (2024-present) | 1.9% |
| Simon Opher | Stroud | Lab | (2024-present) | 0.0% |
| Lembit Öpik | Montgomeryshire | LDem | (1997-2001) | 3.7% |
| Lembit Öpik | Montgomeryshire | LDem | (2005-2010) | 2.9% |
| Lembit Öpik | Montgomeryshire | LDem | (2001-2005) | 5.0% |
| Baroness Oppenheim-Barnes | (Lords) | Con | (1989-2019) | 1.2% |
| Guy Opperman | Hexham | Con | (2010-2015) | 1.0% |
| Guy Opperman | Hexham | Con | (2015-2017) | 0.2% |
| Guy Opperman | Hexham | Con | (2017-2019) | 1.2% |
| Guy Opperman | Hexham | Con | (2019-2024) | 0.1% |
| Abena Oppong-Asare | Erith and Thamesmead | Lab | (2019-2024) | 0.0% |
| Abena Oppong-Asare | Erith and Thamesmead | Lab | (2024-present) | 1.8% |
| Mrs Diana Organ | Forest of Dean | Lab | (1997-2001) | 0.3% |
| Mrs Diana Organ | Forest of Dean | Lab | (2001-2005) | 1.9% |
| Lord Orme | (Lords) | Lab | (1997-2005) | 4.7% |
| Baroness Osamor | (Lords) | Lab | (2018-present) | 1.5% |
| Kate Osamor | Edmonton | Lab | (2015-2017) | 0.6% |
| Kate Osamor | Edmonton | Lab | (2017-2019) | 0.6% |
| Kate Osamor | Edmonton | Lab | (2019-2024) | 0.1% |
| Kate Osamor | Edmonton and Winchmore Hill | Lab | (2024-present) | 2.0% |
| George Osborne | Tatton | Con | (2001-2005) | 1.5% |
| George Osborne | Tatton | Con | (2005-2010) | 3.9% |
| George Osborne | Tatton | Con | (2010-2015) | 2.5% |
| George Osborne | Tatton | Con | (2015-2017) | 0.0% |
| Kate Osborne | Jarrow | Lab | (2019-2024) | 0.3% |
| Kate Osborne | Jarrow and Gateshead East | Lab | (2024-present) | 0.0% |
| Sandra Osborne | Ayr | Lab | (1997-2001) | 0.0% |
| Sandra Osborne | Ayr | Lab | (2001-2005) | 1.1% |
| Sandra Osborne | Ayr, Carrick and Cumnock | Lab | (2005-2010) | 0.9% |
| Sandra Osborne | Ayr, Carrick and Cumnock | Lab | (2010-2015) | 0.3% |
| Tristan Osborne | Chatham and Aylesford | Lab | (2024-present) | 0.5% |
| Kirsten Oswald | East Renfrewshire | SNP | (2015-2017) | 0.0% |
| Kirsten Oswald | East Renfrewshire | SNP | (2019-2024) | 0.0% |
| Richard Ottaway | Croydon South | Con | (1997-2001) | 0.6% |
| Richard Ottaway | Croydon South | Con | (2001-2005) | 2.0% |
| Richard Ottaway | Croydon South | Con | (2005-2010) | 1.8% |
| Richard Ottaway | Croydon South | Con | (2010-2015) | 2.0% |
| Lord Ouseley | (Lords) | Crossbench | (2001-2019) | 39.9% |
| Taiwo Owatemi | Coventry North West | Lab | (2019-2024) | 0.1% |
| Taiwo Owatemi | Coventry North West | Lab | (2024-present) | 1.9% |
| Lord Owen | (Lords) | Crossbench | (1992-2014) | 45.3% |
| Lord Owen | (Lords) | Independent Social Democrat | (2014-2024) | n/a |
| Albert Owen | Ynys Môn | Lab | (2001-2005) | 2.3% |
| Albert Owen | Ynys Môn | Lab | (2005-2010) | 2.6% |
| Albert Owen | Ynys Môn | Lab | (2010-2015) | 0.9% |
| Albert Owen | Ynys Môn | Lab | (2015-2017) | 0.3% |
| Albert Owen | Ynys Môn | Lab | (2017-2019) | 0.5% |
| Baroness Owen of Alderley Edge | (Lords) | Con | (2023-present) | 0.0% |
| Sarah Owen | Luton North | Lab | (2019-2024) | 0.0% |
| Sarah Owen | Luton North | Lab | (2024-present) | 0.0% |
| Lord Oxburgh | (Lords) | Crossbench | (1999-2022) | 20.0% |
| The Bishop of Oxford | (Lords) | Bishop | (2010-2014) | 0.0% |
| The Bishop of Oxford | (Lords) | Bishop | (1993-2006) | 7.7% |
| The Bishop of Oxford | (Lords) | Bishop | (2016-present) | 3.2% |
| The Earl of Oxford and Asquith | (Lords) | LDem | (2014-2019) | 2.2% |
| The Earl of Oxford and Asquith | (Lords) | Non-affiliated | (2019-present) | n/a |
| Viscount Oxfuird | (Lords) | Con | (1986-2003) | 0.0% |
| Lord Paddick | (Lords) | LDem | (2013-present) | 0.5% |
| Darren Paffey | Southampton Itchen | Lab | (2024-present) | 1.7% |
| Mr Richard Page | South West Hertfordshire | Con | (1997-2001) | 0.4% |
| Mr Richard Page | South West Hertfordshire | Con | (2001-2005) | 1.8% |
| James Paice | South East Cambridgeshire | Con | (1997-2001) | 0.1% |
| James Paice | South East Cambridgeshire | Con | (2001-2005) | 0.4% |
| James Paice | South East Cambridgeshire | Con | (2005-2010) | 1.0% |
| James Paice | South East Cambridgeshire | Con | (2010-2015) | 0.8% |
| Ian Paisley Jnr | North Antrim | DUP | (2010-2015) | 0.9% |
| Ian Paisley Jnr | North Antrim | DUP | (2015-2017) | 1.7% |
| Ian Paisley Jnr | North Antrim | DUP | (2017-2019) | 0.9% |
| Ian Paisley Jnr | North Antrim | DUP | (2019-2024) | 0.2% |
| Ian Paisley | North Antrim | DUP | (1997-2001) | 0.0% |
| Ian Paisley | North Antrim | DUP | (2001-2005) | 0.0% |
| Ian Paisley | North Antrim | DUP | (2005-2010) | 2.2% |
| Baroness Paisley of St George's | (Lords) | DUP | (2006-2017) | 0.0% |
| Andrew Pakes | Peterborough | Lab | (2024-present) | 1.5% |
| Lord Palmer | (Lords) | Crossbench | (1990-2023) | 22.7% |
| Lord Palmer of Childs Hill | (Lords) | LDem | (2011-present) | 0.6% |
| Nick Palmer | Broxtowe | Lab | (1997-2001) | 0.9% |
| Nick Palmer | Broxtowe | Lab | (2001-2005) | 0.9% |
| Nick Palmer | Broxtowe | Lab | (2005-2010) | 1.1% |
| Lord Palumbo | (Lords) | Con | (1991-2019) | 1.1% |
| Lord Palumbo of Southwark | (Lords) | LDem | (2013-present) | 8.3% |
| Pam Duncan-Glancy | Glasgow | Lab | (2021-present) | n/a |
| Pam Gosal | West Scotland | Con | (2021-present) | n/a |
| Lord Pannick | (Lords) | Crossbench | (2008-present) | 24.6% |
| Lord Parekh | (Lords) | Lab | (2000-present) | 2.7% |
| Neil Parish | Tiverton and Honiton | Con | (2010-2015) | 1.4% |
| Neil Parish | Tiverton and Honiton | Con | (2015-2017) | 0.0% |
| Neil Parish | Tiverton and Honiton | Con | (2017-2019) | 1.4% |
| Neil Parish | Tiverton and Honiton | Con | (2019-2022) | 1.0% |
| Lord Parker of Minsmere | (Lords) | Crossbench | (2021-present) | n/a |
| Lord Parkinson | (Lords) | Con | (1992-2015) | 1.0% |
| Lord Parkinson of Whitley Bay | (Lords) | Con | (2019-present) | 0.0% |
| Baroness Park of Monmouth | (Lords) | Con | (1990-2010) | 1.4% |
| Baroness Parminter | (Lords) | LDem | (2010-present) | 0.3% |
| Lord Parry | (Lords) | Lab | (1976-2004) | 0.0% |
| Lord Patel | (Lords) | Crossbench | (1999-present) | 32.4% |
| Lord Patel of Blackburn | (Lords) | Lab | (2000-2019) | 1.9% |
| Lord Patel of Bradford | (Lords) | Crossbench | (2006-2008) | 32.4% |
| Lord Patel of Bradford | (Lords) | Lab | (2008-2018) | 0.0% |
| Lord Patel of Bradford | (Lords) | Non-affiliated | (2018-present) | 4.0% |
| Priti Patel | Witham | Con | (2010-2015) | 0.2% |
| Priti Patel | Witham | Con | (2015-2017) | 0.0% |
| Priti Patel | Witham | Con | (2017-2019) | 2.9% |
| Priti Patel | Witham | Con | (2019-2024) | 0.6% |
| Priti Patel | Witham | Con | (2024-present) | 0.0% |
| Owen Paterson | North Shropshire | Con | (1997-2001) | 0.4% |
| Owen Paterson | North Shropshire | Con | (2001-2005) | 0.7% |
| Owen Paterson | North Shropshire | Con | (2005-2010) | 1.8% |
| Owen Paterson | North Shropshire | Con | (2010-2015) | 0.2% |
| Owen Paterson | North Shropshire | Con | (2015-2017) | 1.4% |
| Owen Paterson | North Shropshire | Con | (2017-2019) | 3.8% |
| Owen Paterson | North Shropshire | Con | (2019-2021) | 0.9% |
| Steven Paterson | Stirling | SNP | (2015-2017) | 0.0% |
| Patricia Ferguson | Glasgow Maryhill | Lab | (2003-2007) | 0.3% |
| Patricia Ferguson | Glasgow Maryhill | Lab | (1999-2003) | 0.2% |
| Patricia Ferguson | Glasgow Maryhill | Lab | (2007-2011) | 0.7% |
| Patricia Ferguson | Glasgow Maryhill and Springburn | Lab | (2011-2016) | n/a |
| Patrick Harvie | Glasgow | Green | (2011-2016) | n/a |
| Patrick Harvie | Glasgow | Green | (2003-2007) | 0.5% |
| Patrick Harvie | Glasgow | Green | (2007-2011) | 0.0% |
| Patrick Harvie | Glasgow | Green | (2016-2021) | n/a |
| Patrick Harvie | Glasgow | Green | (2021-present) | n/a |
| Matthew Patrick | Wirral West | Lab | (2024-present) | 1.1% |
| Lord Patten | (Lords) | Con | (1997-present) | 1.2% |
| Lord Patten of Barnes | (Lords) | Con | (2005-present) | 20.5% |
| Lord Paul | (Lords) | Lab | (1996-2010) | 0.6% |
| Lord Paul | (Lords) | Non-affiliated | (2010-present) | 3.7% |
| Paul McLennan | East Lothian | SNP | (2021-present) | n/a |
| Paul Sweeney | Glasgow | Lab | (2021-present) | n/a |
| Paul Martin | Glasgow Provan | Lab | (2011-2016) | n/a |
| Paul Martin | Glasgow Springburn | Lab | (2003-2007) | 0.2% |
| Paul Martin | Glasgow Springburn | Lab | (1999-2003) | 0.2% |
| Paul Martin | Glasgow Springburn | Lab | (2007-2011) | 0.7% |
| Paul Wheelhouse | South Scotland | SNP | (2011-2016) | n/a |
| Paul Wheelhouse | South Scotland | SNP | (2016-2021) | n/a |
| Paul O'Kane | West Scotland | Lab | (2021-present) | n/a |
| Pauline McNeill | Glasgow | Lab | (2016-2021) | n/a |
| Pauline McNeill | Glasgow | Lab | (2021-present) | n/a |
| Pauline McNeill | Glasgow Kelvin | Lab | (2003-2007) | 1.6% |
| Pauline McNeill | Glasgow Kelvin | Lab | (1999-2003) | 2.0% |
| Pauline McNeill | Glasgow Kelvin | Lab | (2007-2011) | 0.4% |
| Rebecca Paul | Reigate | Con | (2024-present) | 0.6% |
| Mark Pawsey | Rugby | Con | (2010-2015) | 1.4% |
| Mark Pawsey | Rugby | Con | (2015-2017) | 0.0% |
| Mark Pawsey | Rugby | Con | (2017-2019) | 3.9% |
| Mark Pawsey | Rugby | Con | (2019-2024) | 0.9% |
| Michael Payne | Gedling | Lab | (2024-present) | 0.0% |
| Lord Peach | (Lords) | Crossbench | (2022-present) | 47.6% |
| Stephanie Peacock | Barnsley East | Lab | (2017-2019) | 1.1% |
| Stephanie Peacock | Barnsley East | Lab | (2019-2024) | 0.0% |
| Stephanie Peacock | Barnsley South | Lab | (2024-present) | 2.3% |
| Jonathan Pearce | High Peak | Lab | (2024-present) | 0.0% |
| Teresa Pearce | Erith and Thamesmead | Lab | (2010-2015) | 0.2% |
| Teresa Pearce | Erith and Thamesmead | Lab | (2015-2017) | 0.0% |
| Teresa Pearce | Erith and Thamesmead | Lab | (2017-2019) | 0.3% |
| Ian Pearson | Dudley South | Lab | (1997-2001) | 0.9% |
| Ian Pearson | Dudley South | Lab | (2001-2005) | 2.2% |
| Ian Pearson | Dudley South | Lab | (2005-2010) | 1.0% |
| Lord Pearson of Rannoch | (Lords) | Con | (1990-2004) | 1.2% |
| Lord Pearson of Rannoch | (Lords) | Conservative Independent | (2004-2007) | n/a |
| Lord Pearson of Rannoch | (Lords) | Non-affiliated | (2019-present) | 65.0% |
| Lord Pearson of Rannoch | (Lords) | UKIP | (2007-2019) | 0.0% |
| Earl Peel | (Lords) | Con | (1973-2006) | 0.3% |
| Earl Peel | (Lords) | Crossbench | (2006-present) | 82.6% |
| Andrew Pelling | Croydon Central | whilst Con | (2005-2007) | 1.9% |
| Andrew Pelling | Croydon Central | whilst Independent | (2007-2010) | n/a |
| Lord Pendry | (Lords) | Lab | (2001-2023) | 3.0% |
| Mr Tom Pendry | Stalybridge and Hyde | Lab | (1997-2001) | 0.3% |
| Baroness Penn | (Lords) | Con | (2019-present) | 0.2% |
| Mike Penning | Hemel Hempstead | Con | (2005-2010) | 2.0% |
| Mike Penning | Hemel Hempstead | Con | (2010-2015) | 1.0% |
| Mike Penning | Hemel Hempstead | Con | (2015-2017) | 0.0% |
| Mike Penning | Hemel Hempstead | Con | (2017-2019) | 2.8% |
| Mike Penning | Hemel Hempstead | Con | (2019-2024) | 0.4% |
| Matthew Pennycook | Greenwich and Woolwich | Lab | (2015-2017) | 0.3% |
| Matthew Pennycook | Greenwich and Woolwich | Lab | (2017-2019) | 0.3% |
| Matthew Pennycook | Greenwich and Woolwich | Lab | (2019-2024) | 0.0% |
| Matthew Pennycook | Greenwich and Woolwich | Lab | (2024-present) | 0.0% |
| John Penrose | Weston-Super-Mare | Con | (2005-2010) | 3.0% |
| John Penrose | Weston-Super-Mare | Con | (2010-2015) | 0.5% |
| John Penrose | Weston-Super-Mare | Con | (2015-2017) | 0.0% |
| John Penrose | Weston-Super-Mare | Con | (2017-2019) | 1.4% |
| John Penrose | Weston-Super-Mare | Con | (2019-2024) | 0.4% |
| Andrew Percy | Brigg and Goole | Con | (2010-2015) | 8.8% |
| Andrew Percy | Brigg and Goole | Con | (2015-2017) | 1.2% |
| Andrew Percy | Brigg and Goole | Con | (2017-2019) | 3.0% |
| Andrew Percy | Brigg and Goole | Con | (2019-2024) | 1.6% |
| Ms Linda Perham | Ilford North | Lab | (1997-2001) | 0.5% |
| Ms Linda Perham | Ilford North | Lab | (2001-2005) | 1.3% |
| Toby Perkins | Chesterfield | Lab | (2010-2015) | 0.8% |
| Toby Perkins | Chesterfield | Lab | (2015-2017) | 0.3% |
| Toby Perkins | Chesterfield | Lab | (2017-2019) | 0.8% |
| Toby Perkins | Chesterfield | Lab | (2019-2024) | 0.1% |
| Toby Perkins | Chesterfield | Lab | (2024-present) | 0.0% |
| Claire Perry | Devizes | Con | (2010-2015) | 0.4% |
| Claire Perry | Devizes | Con | (2015-2017) | 0.5% |
| Claire Perry | Devizes | Con | (2017-2019) | 0.5% |
| Baroness Perry of Southwark | (Lords) | Con | (1991-2016) | 1.5% |
| Lord Perry of Walton | (Lords) | LDem | (1979-2003) | 9.8% |
| Manuela Perteghella | Stratford-on-Avon | LDem | (2024-present) | 0.0% |
| Lord Peston | (Lords) | Lab | (1987-2016) | 3.1% |
| Peter Peacock | Highlands and Islands | Lab | (2003-2007) | 0.0% |
| Peter Peacock | Highlands and Islands | Lab | (1999-2003) | 0.2% |
| Peter Peacock | Highlands and Islands | Lab | (2007-2011) | 0.5% |
| Peter Chapman | North East Scotland | Con | (2016-2021) | n/a |
| The Bishop of Peterborough | (Lords) | Bishop | (2001-2009) | 0.0% |
| The Bishop of Peterborough | (Lords) | Bishop | (2014-2023) | 2.5% |
| The Bishop of Peterborough | (Lords) | Bishop | (2024-present) | n/a |
| Lord Petitgas | (Lords) | Con | (2024-present) | 0.0% |
| Lord Peyton of Yeovil | (Lords) | Con | (1983-2006) | 1.3% |
| Phil Gallie | South of Scotland | Con | (2003-2007) | 3.3% |
| Phil Gallie | South of Scotland | Con | (1999-2003) | 1.8% |
| Jess Phillips | Birmingham Yardley | Lab | (2024-present) | 0.0% |
| Jess Phillips | Birmingham, Yardley | Lab | (2015-2017) | 0.3% |
| Jess Phillips | Birmingham, Yardley | Lab | (2017-2019) | 0.0% |
| Jess Phillips | Birmingham, Yardley | Lab | (2019-2024) | 0.0% |
| Bridget Phillipson | Houghton and Sunderland South | Lab | (2010-2015) | 0.1% |
| Bridget Phillipson | Houghton and Sunderland South | Lab | (2015-2017) | 0.9% |
| Bridget Phillipson | Houghton and Sunderland South | Lab | (2017-2019) | 0.3% |
| Bridget Phillipson | Houghton and Sunderland South | Lab | (2019-2024) | 0.0% |
| Bridget Phillipson | Houghton and Sunderland South | Lab | (2024-present) | 4.2% |
| Stephen Phillips | Sleaford and North Hykeham | Con | (2010-2015) | 1.0% |
| Stephen Phillips | Sleaford and North Hykeham | Con | (2015-2016) | 0.3% |
| Lord Phillips of Sudbury | (Lords) | LDem | (1998-2015) | 6.9% |
| Lord Phillips of Worth Matravers | (Lords) | Judge | (1999-present) | 2.6% |
| Chris Philp | Croydon South | Con | (2015-2017) | 0.2% |
| Chris Philp | Croydon South | Con | (2017-2019) | 0.2% |
| Chris Philp | Croydon South | Con | (2019-2024) | 0.2% |
| Chris Philp | Croydon South | Con | (2024-present) | 2.4% |
| Mrs Anne Picking | East Lothian | Lab | (2001-2005) | 0.9% |
| Lord Pickles | (Lords) | Con | (2018-present) | 0.8% |
| Eric Pickles | Brentwood and Ongar | Con | (1997-2001) | 0.1% |
| Eric Pickles | Brentwood and Ongar | Con | (2001-2005) | 0.6% |
| Eric Pickles | Brentwood and Ongar | Con | (2010-2015) | 0.6% |
| Eric Pickles | Brentwood and Ongar | Con | (2005-2010) | 0.4% |
| Eric Pickles | Brentwood and Ongar | Con | (2015-2017) | 0.0% |
| Mr Colin Pickthall | West Lancashire | Lab | (1997-2001) | 0.5% |
| Mr Colin Pickthall | West Lancashire | Lab | (2001-2005) | 1.4% |
| Laura Pidcock | North West Durham | Lab | (2017-2019) | 0.3% |
| Baroness Pidding | (Lords) | Con | (2015-present) | 0.2% |
| Baroness Pidgeon | (Lords) | LDem | (2024-present) | 0.0% |
| Baroness Pike | (Lords) | Con | (1974-2004) | 0.0% |
| Mr Peter Pike | Burnley | Lab | (1997-2001) | 1.1% |
| Mr Peter Pike | Burnley | Lab | (2001-2005) | 1.1% |
| Lord Pilkington of Oxenford | (Lords) | Con | (1996-2011) | 2.0% |
| Christopher Pincher | Tamworth | Con | (2010-2015) | 1.4% |
| Christopher Pincher | Tamworth | Con | (2015-2017) | 0.0% |
| Christopher Pincher | Tamworth | Con | (2017-2019) | 0.2% |
| Christopher Pincher | Tamworth | whilst Con | (2019-2022) | 0.0% |
| Christopher Pincher | Tamworth | whilst Independent | (2022-2023) | n/a |
| Al Pinkerton | Surrey Heath | LDem | (2024-present) | 1.6% |
| Baroness Pinnock | (Lords) | LDem | (2014-present) | 0.1% |
| David Pinto-Duschinsky | Hendon | Lab | (2024-present) | 2.3% |
| Lee Pitcher | Doncaster East and the Isle of Axholme | Lab | (2024-present) | 0.0% |
| Baroness Pitkeathley | (Lords) | Lab | (1997-present) | 0.4% |
| Lord Plant of Highfield | (Lords) | Lab | (1992-2024) | 2.8% |
| James Plaskitt | Warwick and Leamington | Lab | (1997-2001) | 0.6% |
| James Plaskitt | Warwick and Leamington | Lab | (2001-2005) | 1.2% |
| James Plaskitt | Warwick and Leamington | Lab | (2005-2010) | 0.4% |
| Jo Platt | Leigh | Lab | (2017-2019) | 0.3% |
| Jo Platt | Leigh and Atherton | Lab | (2024-present) | 0.0% |
| Baroness Platt of Writtle | (Lords) | Con | (1981-2015) | 0.7% |
| Lord Plowden | (Lords) | Crossbench | (1959-2001) | n/a |
| Lord Plumb | (Lords) | Con | (1987-2017) | 1.0% |
| Lord Plummer of St Marylebone | (Lords) | Con | (1981-2009) | 0.3% |
| Lord Polak | (Lords) | Con | (2015-present) | 2.0% |
| Mr Kerry Pollard | St Albans | Lab | (1997-2001) | 1.6% |
| Mr Kerry Pollard | St Albans | Lab | (2001-2005) | 3.2% |
| Luke Pollard | Plymouth Sutton and Devonport | Lab | (2024-present) | 0.0% |
| Luke Pollard | Plymouth, Sutton and Devonport | Lab | (2017-2019) | 0.0% |
| Luke Pollard | Plymouth, Sutton and Devonport | Lab | (2019-2024) | 0.0% |
| Mr Chris Pond | Gravesham | Lab | (1997-2001) | 0.2% |
| Mr Chris Pond | Gravesham | Lab | (2001-2005) | 0.4% |
| Lord Ponsonby of Shulbrede | (Lords) | Lab | (2000-present) | 0.8% |
| Lord Popat | (Lords) | Con | (2010-present) | 0.4% |
| Greg Pope | Hyndburn | Lab | (1997-2001) | 0.5% |
| Greg Pope | Hyndburn | Lab | (2001-2005) | 1.5% |
| Greg Pope | Hyndburn | Lab | (2005-2010) | 1.9% |
| Baroness Porter of Fulwood | (Lords) | Con | (2024-present) | 0.0% |
| Lord Porter of Luddenham | (Lords) | Crossbench | (1990-2002) | 11.1% |
| Lord Porter of Spalding | (Lords) | Con | (2015-present) | 0.8% |
| Mr Michael Portillo | Kensington and Chelsea | Con | (1999-2001) | 0.8% |
| Mr Michael Portillo | Kensington and Chelsea | Con | (2001-2005) | 2.0% |
| The Bishop of Portsmouth | (Lords) | Bishop | (1999-2009) | 2.4% |
| The Bishop of Portsmouth | (Lords) | Bishop | (2014-2021) | 9.1% |
| Daniel Poulter | Central Suffolk and North Ipswich | Con | (2010-2015) | 1.5% |
| Daniel Poulter | Central Suffolk and North Ipswich | Con | (2015-2017) | 0.5% |
| Daniel Poulter | Central Suffolk and North Ipswich | Con | (2017-2019) | 2.6% |
| Daniel Poulter | Central Suffolk and North Ipswich | whilst Con | (2019-2024) | 2.2% |
| Daniel Poulter | Central Suffolk and North Ipswich | whilst Lab | (2024-2024) | 0.0% |
| Steve Pound | Ealing North | Lab | (1997-2001) | 0.9% |
| Steve Pound | Ealing North | Lab | (2001-2005) | 1.8% |
| Steve Pound | Ealing North | Lab | (2005-2010) | 3.0% |
| Steve Pound | Ealing North | Lab | (2010-2015) | 1.0% |
| Steve Pound | Ealing North | Lab | (2015-2017) | 1.6% |
| Steve Pound | Ealing North | Lab | (2017-2019) | 0.9% |
| Lord Powell of Bayswater | (Lords) | Crossbench | (2000-present) | 55.9% |
| Joe Powell | Kensington and Bayswater | Lab | (2024-present) | 0.0% |
| Lucy Powell | Manchester Central | Lab | (2012-2015) | 0.0% |
| Lucy Powell | Manchester Central | Lab | (2015-2017) | 0.7% |
| Lucy Powell | Manchester Central | Lab | (2017-2019) | 0.0% |
| Lucy Powell | Manchester Central | Lab | (2019-2024) | 0.0% |
| Lucy Powell | Manchester Central | Lab | (2024-present) | 0.0% |
| Mr Raymond Powell | Ogmore | Lab | (1997-2001) | 1.8% |
| Mr Raymond Powell | Ogmore | Lab | (2001-2001) | 3.0% |
| Rebecca Pow | Taunton Deane | Con | (2015-2017) | 0.0% |
| Rebecca Pow | Taunton Deane | Con | (2017-2019) | 1.8% |
| Rebecca Pow | Taunton Deane | Con | (2019-2024) | 0.1% |
| Gregor Poynton | Livingston | Lab | (2024-present) | 0.0% |
| Baroness Prashar | (Lords) | Crossbench | (1999-present) | 14.6% |
| Lord Prentice | (Lords) | Con | (1992-2001) | 0.0% |
| Bridget Prentice | Lewisham East | Lab | (1997-2001) | 0.4% |
| Bridget Prentice | Lewisham East | Lab | (2001-2005) | 0.8% |
| Bridget Prentice | Lewisham East | Lab | (2005-2010) | 1.2% |
| Gordon Prentice | Pendle | Lab | (1997-2001) | 3.3% |
| Gordon Prentice | Pendle | Lab | (2001-2005) | 5.7% |
| Gordon Prentice | Pendle | Lab | (2005-2010) | 8.6% |
| Lord Prentis of Leeds | (Lords) | Lab | (2022-present) | 0.0% |
| Victoria Prentis | Banbury | Con | (2015-2017) | 0.7% |
| Victoria Prentis | Banbury | Con | (2017-2019) | 2.2% |
| Victoria Prentis | Banbury | Con | (2019-2024) | 0.0% |
| Lord Prescott | (Lords) | Lab | (2010-2024) | 0.2% |
| John Prescott | Kingston upon Hull East | Lab | (1997-2001) | 0.0% |
| John Prescott | Kingston upon Hull East | Lab | (2001-2005) | 1.0% |
| John Prescott | Kingston upon Hull East | Lab | (2005-2010) | 0.7% |
| Lord Price | (Lords) | Con | (2016-present) | 0.0% |
| Adam Price | Carmarthen East and Dinefwr | PC | (2001-2005) | 0.8% |
| Adam Price | Carmarthen East and Dinefwr | PC | (2005-2010) | 0.5% |
| Baroness Primarolo | (Lords) | Lab | (2015-present) | 0.2% |
| Dawn Primarolo | Bristol South | Lab | (1997-2001) | 0.0% |
| Dawn Primarolo | Bristol South | Lab | (2001-2005) | 0.0% |
| Dawn Primarolo | Bristol South | Lab | (2005-2010) | 0.5% |
| Dawn Primarolo | Bristol South | Lab | (2010-2015) | 0.0% |
| Peter Prinsley | Bury St Edmunds and Stowmarket | Lab | (2024-present) | 0.0% |
| Lord Prior | (Lords) | Con | (1987-2016) | 9.0% |
| Lord Prior of Brampton | (Lords) | Con | (2015-2018) | 3.2% |
| Lord Prior of Brampton | (Lords) | Non-affiliated | (2018-present) | 50.0% |
| Mr David Prior | North Norfolk | Con | (1997-2001) | 0.9% |
| Mark Prisk | Hertford and Stortford | Con | (2001-2005) | 0.4% |
| Mark Prisk | Hertford and Stortford | Con | (2005-2010) | 0.6% |
| Mark Prisk | Hertford and Stortford | Con | (2010-2015) | 1.0% |
| Mark Prisk | Hertford and Stortford | Con | (2015-2017) | 0.0% |
| Mark Prisk | Hertford and Stortford | Con | (2017-2019) | 1.4% |
| Mark Pritchard | The Wrekin | Con | (2005-2010) | 0.9% |
| Mark Pritchard | The Wrekin | Con | (2010-2015) | 2.1% |
| Mark Pritchard | The Wrekin | Con | (2015-2017) | 0.0% |
| Mark Pritchard | The Wrekin | Con | (2017-2019) | 3.2% |
| Mark Pritchard | The Wrekin | Con | (2019-2024) | 0.3% |
| Mark Pritchard | The Wrekin | Con | (2024-present) | 0.0% |
| Baroness Prosser | (Lords) | Lab | (2004-present) | 0.6% |
| Gwyn Prosser | Dover | Lab | (1997-2001) | 0.5% |
| Gwyn Prosser | Dover | Lab | (2001-2005) | 1.6% |
| Gwyn Prosser | Dover | Lab | (2005-2010) | 1.4% |
| Lord Prys-Davies | (Lords) | Lab | (1983-2011) | 5.9% |
| Lord Prys-Davies | (Lords) | Non-affiliated | (2011-2015) | n/a |
| John Pugh | Southport | LDem | (2001-2005) | 1.7% |
| John Pugh | Southport | LDem | (2005-2010) | 2.8% |
| John Pugh | Southport | LDem | (2010-2015) | 3.3% |
| John Pugh | Southport | LDem | (2015-2017) | 0.3% |
| Ken Purchase | Wolverhampton North East | Lab | (1997-2001) | 0.1% |
| Ken Purchase | Wolverhampton North East | Lab | (2001-2005) | 1.6% |
| Ken Purchase | Wolverhampton North East | Lab | (2005-2010) | 1.7% |
| James Purnell | Stalybridge and Hyde | Lab | (2001-2005) | 0.8% |
| James Purnell | Stalybridge and Hyde | Lab | (2005-2010) | 0.7% |
| Tom Pursglove | Corby | Con | (2015-2017) | 0.7% |
| Tom Pursglove | Corby | Con | (2017-2019) | 2.5% |
| Tom Pursglove | Corby | Con | (2019-2024) | 0.0% |
| Lord Purvis of Tweed | (Lords) | LDem | (2013-present) | 0.3% |
| Lord Puttnam | (Lords) | Lab | (1997-2021) | 1.7% |
| Lord Pym | (Lords) | Con | (1987-2008) | 1.9% |
| Anum Qaisar | Airdrie and Shotts | SNP | (2021-2024) | 0.0% |
| Richard Quigley | Isle of Wight West | Lab | (2024-present) | 1.7% |
| Baroness Quin | (Lords) | Lab | (2006-present) | 0.9% |
| Will Quince | Colchester | Con | (2015-2017) | 0.2% |
| Will Quince | Colchester | Con | (2017-2019) | 1.6% |
| Will Quince | Colchester | Con | (2019-2024) | 0.0% |
| Jeremy Quin | Horsham | Con | (2015-2017) | 0.0% |
| Jeremy Quin | Horsham | Con | (2017-2019) | 0.9% |
| Jeremy Quin | Horsham | Con | (2019-2024) | 0.1% |
| Ms Joyce Quin | Gateshead East and Washington West | Lab | (1997-2001) | 0.0% |
| Ms Joyce Quin | Gateshead East and Washington West | Lab | (2001-2005) | 0.7% |
| Mr Lawrie Quinn | Scarborough and Whitby | Lab | (1997-2001) | 0.2% |
| Mr Lawrie Quinn | Scarborough and Whitby | Lab | (2001-2005) | 1.1% |
| Lord Quinton | (Lords) | Con | (1983-2010) | 4.5% |
| Lord Quirk | (Lords) | Crossbench | (1994-2017) | 16.8% |
| Yasmin Qureshi | Bolton South and Walkden | Lab | (2024-present) | 0.9% |
| Yasmin Qureshi | Bolton South East | Lab | (2010-2015) | 0.8% |
| Yasmin Qureshi | Bolton South East | Lab | (2015-2017) | 0.4% |
| Yasmin Qureshi | Bolton South East | Lab | (2017-2019) | 0.3% |
| Yasmin Qureshi | Bolton South East | Lab | (2019-2024) | 0.0% |
| Dominic Raab | Esher and Walton | Con | (2010-2015) | 1.7% |
| Dominic Raab | Esher and Walton | Con | (2015-2017) | 0.0% |
| Dominic Raab | Esher and Walton | Con | (2017-2019) | 2.2% |
| Dominic Raab | Esher and Walton | Con | (2019-2024) | 0.0% |
| Steve Race | Exeter | Lab | (2024-present) | 0.0% |
| Rachael Hamilton | Ettrick, Roxburgh and Berwickshire | Con | (2017-2021) | n/a |
| Rachael Hamilton | Ettrick, Roxburgh and Berwickshire | Con | (2021-present) | n/a |
| Rachael Hamilton | South Scotland | Con | (2016-2017) | n/a |
| Lord Radice | (Lords) | Lab | (2001-2022) | 0.6% |
| Mr Giles Radice | North Durham | Lab | (1997-2001) | 0.9% |
| Shivani Raja | Leicester East | Con | (2024-present) | 0.8% |
| Bill Rammell | Harlow | Lab | (1997-2001) | 1.0% |
| Bill Rammell | Harlow | Lab | (2001-2005) | 0.3% |
| Bill Rammell | Harlow | Lab | (2005-2010) | 0.6% |
| Adrian Ramsay | Waveney Valley | Green | (2024-present) | 0.0% |
| Baroness Ramsay of Cartvale | (Lords) | Lab | (1996-present) | 0.3% |
| Lord Ramsbotham | (Lords) | Crossbench | (2005-2022) | 15.1% |
| Baroness Ramsey of Wall Heath | (Lords) | Lab | (2024-present) | 0.0% |
| Lord Rana | (Lords) | Con | (2016-2024) | 3.1% |
| Lord Rana | (Lords) | Crossbench | (2004-2016) | 59.0% |
| John Randall | Uxbridge | Con | (1997-2001) | 1.3% |
| John Randall | Uxbridge | Con | (2001-2005) | 1.4% |
| John Randall | Uxbridge | Con | (2005-2010) | 1.2% |
| John Randall | Uxbridge and South Ruislip | Con | (2010-2015) | 1.2% |
| Lord Randall of St Budeaux | (Lords) | Lab | (1997-2012) | 3.0% |
| Tom Randall | Gedling | Con | (2019-2024) | 1.0% |
| Lord Randall of Uxbridge | (Lords) | Con | (2018-present) | 9.0% |
| Connor Rand | Altrincham and Sale West | Lab | (2024-present) | 0.0% |
| Baroness Randerson | (Lords) | LDem | (2011-present) | 1.0% |
| Lord Ranger | (Lords) | Con | (2019-present) | 1.2% |
| Andrew Ranger | Wrexham | Lab | (2024-present) | 0.0% |
| Lord Ranger of Northwood | (Lords) | Con | (2023-present) | 0.0% |
| Jack Rankin | Windsor | Con | (2024-present) | 0.0% |
| Mr Syd Rapson | Portsmouth North | Lab | (1997-2001) | 0.5% |
| Mr Syd Rapson | Portsmouth North | Lab | (2001-2005) | 0.7% |
| Faisal Rashid | Warrington South | Lab | (2017-2019) | 0.0% |
| Lord Ravensdale | (Lords) | Crossbench | (2019-present) | 24.8% |
| Baroness Rawlings | (Lords) | Con | (1994-present) | 0.7% |
| Lord Rawlinson of Ewell | (Lords) | Con | (1978-2006) | 1.0% |
| Lord Rayne | (Lords) | Crossbench | (1976-2003) | n/a |
| Angela Rayner | Ashton-under-Lyne | Lab | (2015-2017) | 0.3% |
| Angela Rayner | Ashton-under-Lyne | Lab | (2017-2019) | 0.0% |
| Angela Rayner | Ashton-under-Lyne | Lab | (2019-2024) | 0.0% |
| Angela Rayner | Ashton-under-Lyne | Lab | (2024-present) | 1.7% |
| Nick Raynsford | Greenwich and Woolwich | Lab | (1997-2001) | 0.3% |
| Nick Raynsford | Greenwich and Woolwich | Lab | (2001-2005) | 0.2% |
| Nick Raynsford | Greenwich and Woolwich | Lab | (2005-2010) | 0.7% |
| Nick Raynsford | Greenwich and Woolwich | Lab | (2010-2015) | 0.5% |
| Lord Razzall | (Lords) | LDem | (1997-present) | 0.3% |
| Lord Rea | (Lords) | Lab | (1981-2020) | 4.0% |
| Mike Reader | Northampton South | Lab | (2024-present) | 2.0% |
| Lord Reay | (Lords) | Con | (1963-2013) | 1.9% |
| Lord Reay | (Lords) | Con | (2019-present) | 0.0% |
| Baroness Rebuck | (Lords) | Lab | (2014-present) | 0.3% |
| Mark Reckless | Rochester and Strood | Con | (2010-2014) | 8.5% |
| Mark Reckless | Rochester and Strood | UKIP | (2014-2015) | 0.0% |
| Lord Redesdale | (Lords) | LDem | (2000-present) | 1.0% |
| Baroness Redfern | (Lords) | Con | (2015-present) | 0.3% |
| John Redwood | Wokingham | Con | (1997-2001) | 0.1% |
| John Redwood | Wokingham | Con | (2001-2005) | 0.7% |
| John Redwood | Wokingham | Con | (2005-2010) | 2.7% |
| John Redwood | Wokingham | Con | (2010-2015) | 5.0% |
| John Redwood | Wokingham | Con | (2015-2017) | 1.4% |
| John Redwood | Wokingham | Con | (2017-2019) | 3.5% |
| John Redwood | Wokingham | Con | (2019-2024) | 2.7% |
| Lord Reed of Allermuir | (Lords) | Crossbench | (2020-present) | n/a |
| Andy Reed | Loughborough | Lab | (1997-2001) | 0.5% |
| Andy Reed | Loughborough | Lab | (2001-2005) | 0.6% |
| Andy Reed | Loughborough | Lab | (2005-2010) | 1.8% |
| David Reed | Exmouth and Exeter East | Con | (2024-present) | 0.0% |
| Jamie Reed | Copeland | Lab | (2005-2010) | 0.7% |
| Jamie Reed | Copeland | Lab | (2010-2015) | 0.1% |
| Jamie Reed | Copeland | Lab | (2015-2017) | 1.5% |
| Steve Reed | Croydon North | Lab | (2012-2015) | 0.0% |
| Steve Reed | Croydon North | Lab | (2015-2017) | 0.3% |
| Steve Reed | Croydon North | Lab | (2017-2019) | 0.3% |
| Steve Reed | Croydon North | Lab | (2019-2024) | 0.0% |
| Steve Reed | Streatham and Croydon North | Lab | (2024-present) | 0.0% |
| Lord Rees | (Lords) | Con | (1987-2008) | 0.9% |
| Lord Rees-Mogg | (Lords) | Crossbench | (1988-2012) | 24.6% |
| Jacob Rees-Mogg | North East Somerset | Con | (2010-2015) | 8.9% |
| Jacob Rees-Mogg | North East Somerset | Con | (2015-2017) | 1.8% |
| Jacob Rees-Mogg | North East Somerset | Con | (2017-2019) | 3.4% |
| Jacob Rees-Mogg | North East Somerset | Con | (2019-2024) | 1.2% |
| Christina Rees | Neath | whilst Independent | (2022-2024) | n/a |
| Christina Rees | Neath | Lab | (2015-2017) | 0.6% |
| Christina Rees | Neath | Lab | (2017-2019) | 0.0% |
| Christina Rees | Neath | whilst Lab | (2019-2022) | 0.0% |
| Lord Rees of Ludlow | (Lords) | Crossbench | (2005-present) | 22.6% |
| Simon Reevell | Dewsbury | Con | (2010-2015) | 2.9% |
| Ellie Reeves | Lewisham West and East Dulwich | Lab | (2024-present) | 0.0% |
| Ellie Reeves | Lewisham West and Penge | Lab | (2017-2019) | 0.3% |
| Ellie Reeves | Lewisham West and Penge | Lab | (2019-2024) | 0.0% |
| Rachel Reeves | Leeds West | Lab | (2010-2015) | 0.0% |
| Rachel Reeves | Leeds West | Lab | (2015-2017) | 0.0% |
| Rachel Reeves | Leeds West | Lab | (2017-2019) | 0.0% |
| Rachel Reeves | Leeds West | Lab | (2019-2024) | 0.0% |
| Rachel Reeves | Leeds West and Pudsey | Lab | (2024-present) | 0.0% |
| Alan Reid | Argyll and Bute | LDem | (2001-2005) | 2.0% |
| Alan Reid | Argyll and Bute | LDem | (2005-2010) | 1.5% |
| Alan Reid | Argyll and Bute | LDem | (2010-2015) | 2.5% |
| Lord Reid of Cardowan | (Lords) | Lab | (2010-present) | 1.0% |
| Joani Reid | East Kilbride and Strathaven | Lab | (2024-present) | 0.0% |
| John Reid | Airdrie and Shotts | Lab | (2005-2010) | 2.2% |
| John Reid | Hamilton North and Bellshill | Lab | (1997-2001) | 0.3% |
| John Reid | Hamilton North and Bellshill | Lab | (2001-2005) | 0.9% |
| Lord Remnant | (Lords) | Con | (2022-present) | 0.0% |
| Mr David Rendel | Newbury | LDem | (1997-2001) | 1.2% |
| Mr David Rendel | Newbury | LDem | (2001-2005) | 1.4% |
| Baroness Rendell of Babergh | (Lords) | Lab | (1997-2015) | 1.0% |
| Lord Renfrew of Kaimsthorn | (Lords) | Con | (1991-2021) | 1.1% |
| Lord Rennard | (Lords) | LDem | (1999-present) | 1.0% |
| Willie Rennie | Dunfermline and West Fife | LDem | (2006-2010) | 0.8% |
| Lord Renton | (Lords) | Con | (1979-2007) | 0.9% |
| Lord Renton of Mount Harry | (Lords) | Con | (1997-2016) | 5.2% |
| Lord Renwick of Clifton | (Lords) | Crossbench | (2008-2018) | 33.3% |
| Lord Renwick of Clifton | (Lords) | Lab | (1997-2007) | 2.1% |
| Emma Reynolds | Wolverhampton North East | Lab | (2010-2015) | 0.0% |
| Emma Reynolds | Wolverhampton North East | Lab | (2015-2017) | 1.2% |
| Emma Reynolds | Wolverhampton North East | Lab | (2017-2019) | 0.4% |
| Emma Reynolds | Wycombe | Lab | (2024-present) | 0.0% |
| Jonathan Reynolds | Stalybridge and Hyde | Lab | (2010-2015) | 0.7% |
| Jonathan Reynolds | Stalybridge and Hyde | Lab | (2015-2017) | 0.3% |
| Jonathan Reynolds | Stalybridge and Hyde | Lab | (2017-2019) | 0.3% |
| Jonathan Reynolds | Stalybridge and Hyde | Lab | (2019-2024) | 0.0% |
| Jonathan Reynolds | Stalybridge and Hyde | Lab | (2024-present) | 1.4% |
| Joshua Reynolds | Maidenhead | LDem | (2024-present) | 0.0% |
| Rhoda Grant | Highlands and Islands | Lab | (2011-2016) | n/a |
| Rhoda Grant | Highlands and Islands | Lab | (1999-2003) | 1.1% |
| Rhoda Grant | Highlands and Islands | Lab | (2007-2011) | 0.0% |
| Rhoda Grant | Highlands and Islands | Lab | (2016-2021) | n/a |
| Rhoda Grant | Highlands and Islands | Lab | (2021-present) | n/a |
| Martin Rhodes | Glasgow North | Lab | (2024-present) | 1.1% |
| Rhona Brankin | Midlothian | Lab | (2003-2007) | 0.2% |
| Rhona Brankin | Midlothian | Lab | (1999-2003) | 0.4% |
| Rhona Brankin | Midlothian | Lab | (2007-2011) | 0.2% |
| Lord Ribeiro | (Lords) | Con | (2010-2023) | 1.6% |
| Bell Ribeiro-Addy | Clapham and Brixton Hill | Lab | (2024-present) | 5.3% |
| Bell Ribeiro-Addy | Streatham | Lab | (2019-2024) | 1.0% |
| Lord Richard | (Lords) | Lab | (1990-2018) | 1.6% |
| Richard Leonard | Central Scotland | Lab | (2016-2021) | n/a |
| Richard Leonard | Central Scotland | Lab | (2021-present) | n/a |
| Richard Lyle | Central Scotland | SNP | (2011-2016) | n/a |
| Richard Simpson | Mid Scotland and Fife | Lab | (2011-2016) | n/a |
| Richard Simpson | Mid Scotland and Fife | Lab | (2007-2011) | 0.7% |
| Richard Lochhead | Moray | SNP | (2011-2016) | n/a |
| Richard Lochhead | Moray | SNP | (2006-2007) | 0.8% |
| Richard Lochhead | Moray | SNP | (2007-2011) | 0.2% |
| Richard Lochhead | Moray | SNP | (2016-2021) | n/a |
| Richard Lochhead | Moray | SNP | (2021-present) | n/a |
| Richard Baker | North East Scotland | Lab | (2011-2016) | n/a |
| Richard Baker | North East Scotland | Lab | (2003-2007) | 0.2% |
| Richard Baker | North East Scotland | Lab | (2007-2011) | 0.0% |
| Richard Lochhead | North East Scotland | SNP | (2003-2006) | 0.8% |
| Richard Lochhead | North East Scotland | SNP | (1999-2003) | 1.4% |
| Richard Simpson | Ochil | Lab | (1999-2003) | 0.3% |
| Richard Lyle | Uddingston and Bellshill | SNP | (2016-2021) | n/a |
| Lord Richards of Herstmonceux | (Lords) | Crossbench | (2014-present) | 38.2% |
| Jake Richards | Rother Valley | Lab | (2024-present) | 0.0% |
| Nicola Richards | West Bromwich East | Con | (2019-2024) | 0.4% |
| Lord Richardson | (Lords) | Crossbench | (1979-2004) | 0.0% |
| Angela Richardson | Guildford | Con | (2019-2024) | 0.3% |
| Baroness Richardson of Calow | (Lords) | Crossbench | (1998-2018) | 38.5% |
| Lord Richardson of Duntisbourne | (Lords) | Crossbench | (1983-2010) | 4.8% |
| Lord Ricketts | (Lords) | Crossbench | (2016-present) | 7.7% |
| Jenny Riddell-Carpenter | Suffolk Coastal | Lab | (2024-present) | 0.0% |
| Viscount Ridley | (Lords) | Con | (2013-2021) | 1.9% |
| Malcolm Rifkind | Kensington | Con | (2010-2015) | 0.6% |
| Malcolm Rifkind | Kensington and Chelsea | Con | (2005-2010) | 1.9% |
| Lucy Rigby | Northampton North | Lab | (2024-present) | 0.0% |
| Marie Rimmer | St Helens South and Whiston | Lab | (2015-2017) | 0.6% |
| Marie Rimmer | St Helens South and Whiston | Lab | (2017-2019) | 0.3% |
| Marie Rimmer | St Helens South and Whiston | Lab | (2019-2024) | 0.4% |
| Marie Rimmer | St Helens South and Whiston | Lab | (2024-present) | 3.3% |
| Linda Riordan | Halifax | Lab | (2005-2010) | 5.4% |
| Linda Riordan | Halifax | Lab | (2010-2015) | 0.9% |
| The Bishop of Ripon and Leeds | (Lords) | Bishop | (2006-2014) | 4.7% |
| Lord Risby | (Lords) | Con | (2011-present) | 0.2% |
| Baroness Ritchie of Brompton | (Lords) | Con | (2010-2012) | 0.0% |
| Baroness Ritchie of Downpatrick | (Lords) | Non-affiliated | (2019-present) | 12.9% |
| Margaret Ritchie | South Down | SDLP | (2010-2015) | 0.0% |
| Margaret Ritchie | South Down | SDLP | (2015-2017) | 0.0% |
| Lord Rix | (Lords) | Crossbench | (1992-2016) | 16.4% |
| Rob Gibson | Caithness, Sutherland and Ross | SNP | (2011-2016) | n/a |
| Rob Gibson | Highlands and Islands | SNP | (2003-2007) | 1.0% |
| Rob Gibson | Highlands and Islands | SNP | (2007-2011) | 0.0% |
| Lord Robathan | (Lords) | Con | (2015-present) | 1.7% |
| Andrew Robathan | Blaby | Con | (1997-2001) | 0.4% |
| Andrew Robathan | Blaby | Con | (2001-2005) | 1.7% |
| Andrew Robathan | Blaby | Con | (2005-2010) | 0.6% |
| Andrew Robathan | South Leicestershire | Con | (2010-2015) | 1.0% |
| Robert Brown | Glasgow | LDem | (2003-2007) | 0.6% |
| Robert Brown | Glasgow | LDem | (1999-2003) | 2.3% |
| Robert Brown | Glasgow | LDem | (2007-2011) | 0.5% |
| Lord Roberts of Belgravia | (Lords) | Con | (2022-present) | 0.5% |
| Lord Roberts of Conwy | (Lords) | Con | (1997-2013) | 0.8% |
| Lord Roberts of Llandudno | (Lords) | LDem | (2004-present) | 1.8% |
| Angus Robertson | Moray | SNP | (2001-2005) | 0.2% |
| Angus Robertson | Moray | SNP | (2005-2010) | 1.6% |
| Angus Robertson | Moray | SNP | (2010-2015) | 0.0% |
| Angus Robertson | Moray | SNP | (2015-2017) | 0.0% |
| Dave Robertson | Lichfield | Lab | (2024-present) | 0.6% |
| Mr George Robertson | Hamilton South | Lab | (1997-1999) | 0.0% |
| Hugh Robertson | Faversham and Mid Kent | Con | (2001-2005) | 1.4% |
| Hugh Robertson | Faversham and Mid Kent | Con | (2005-2010) | 0.7% |
| Hugh Robertson | Faversham and Mid Kent | Con | (2010-2015) | 1.3% |
| Joe Robertson | Isle of Wight East | Con | (2024-present) | 1.4% |
| John Robertson | Glasgow Anniesland | Lab | (2000-2001) | 0.0% |
| John Robertson | Glasgow Anniesland | Lab | (2001-2005) | 1.7% |
| John Robertson | Glasgow North West | Lab | (2005-2010) | 0.8% |
| John Robertson | Glasgow North West | Lab | (2010-2015) | 0.0% |
| Laurence Robertson | Tewkesbury | Con | (1997-2001) | 1.3% |
| Laurence Robertson | Tewkesbury | Con | (2001-2005) | 1.1% |
| Laurence Robertson | Tewkesbury | Con | (2005-2010) | 1.3% |
| Laurence Robertson | Tewkesbury | Con | (2010-2015) | 3.6% |
| Laurence Robertson | Tewkesbury | Con | (2015-2017) | 1.6% |
| Laurence Robertson | Tewkesbury | Con | (2017-2019) | 3.3% |
| Laurence Robertson | Tewkesbury | Con | (2019-2024) | 0.9% |
| Lord Robertson of Port Ellen | (Lords) | Crossbench | (2000-2004) | n/a |
| Lord Robertson of Port Ellen | (Lords) | Lab | (2004-present) | 1.1% |
| Lord Robertson of Port Ellen | (Lords) | Other | (1999-2000) | n/a |
| Rob Roberts | Delyn | whilst Con | (2019-2021) | 0.0% |
| Rob Roberts | Delyn | whilst Independent | (2021-2024) | n/a |
| Robin Harper | Lothians | Green | (2003-2007) | 1.3% |
| Robin Harper | Lothians | Green | (1999-2003) | 0.0% |
| Robin Harper | Lothians | Green | (2007-2011) | 0.0% |
| Gavin Robinson | Belfast East | DUP | (2015-2017) | 0.7% |
| Gavin Robinson | Belfast East | DUP | (2017-2019) | 0.0% |
| Gavin Robinson | Belfast East | DUP | (2019-2024) | 0.8% |
| Gavin Robinson | Belfast East | DUP | (2024-present) | 0.0% |
| Geoffrey Robinson | Coventry North West | Lab | (1997-2001) | 0.0% |
| Geoffrey Robinson | Coventry North West | Lab | (2001-2005) | 1.0% |
| Geoffrey Robinson | Coventry North West | Lab | (2005-2010) | 0.9% |
| Geoffrey Robinson | Coventry North West | Lab | (2010-2015) | 1.4% |
| Geoffrey Robinson | Coventry North West | Lab | (2015-2017) | 1.3% |
| Geoffrey Robinson | Coventry North West | Lab | (2017-2019) | 1.3% |
| Iris Robinson | Strangford | DUP | (2001-2005) | 0.0% |
| Iris Robinson | Strangford | DUP | (2005-2010) | 0.3% |
| Mary Robinson | Cheadle | Con | (2015-2017) | 0.0% |
| Mary Robinson | Cheadle | Con | (2017-2019) | 1.1% |
| Mary Robinson | Cheadle | Con | (2019-2024) | 0.8% |
| Peter Robinson | Belfast East | DUP | (1997-2001) | 0.0% |
| Peter Robinson | Belfast East | DUP | (2001-2005) | 0.0% |
| Peter Robinson | Belfast East | DUP | (2005-2010) | 0.4% |
| Lord Roborough | (Lords) | Con | (2022-present) | 0.0% |
| Tim Roca | Macclesfield | Lab | (2024-present) | 0.0% |
| Mrs Barbara Roche | Hornsey and Wood Green | Lab | (1997-2001) | 0.1% |
| Mrs Barbara Roche | Hornsey and Wood Green | Lab | (2001-2005) | 0.4% |
| The Bishop of Rochester | (Lords) | Bishop | (1999-2009) | 13.3% |
| The Bishop of Rochester | (Lords) | Bishop | (2014-2021) | 0.0% |
| Baroness Rock | (Lords) | Con | (2015-present) | 0.7% |
| Matt Rodda | Reading Central | Lab | (2024-present) | 1.8% |
| Matt Rodda | Reading East | Lab | (2017-2019) | 0.3% |
| Matt Rodda | Reading East | Lab | (2019-2024) | 0.0% |
| Roderick Campbell | North East Fife | SNP | (2011-2016) | n/a |
| Lord Rodger of Earlsferry | (Lords) | Judge | (1992-2011) | n/a |
| Lord Rodgers of Quarry Bank | (Lords) | LDem | (1992-2023) | 2.0% |
| Mrs Marion Roe | Broxbourne | Con | (1997-2001) | 0.1% |
| Mrs Marion Roe | Broxbourne | Con | (2001-2005) | 0.3% |
| Lord Rogan | (Lords) | UUP | (1999-present) | 0.1% |
| Mr Allan Rogers | Rhondda | Lab | (1997-2001) | 1.0% |
| Dan Rogerson | North Cornwall | LDem | (2005-2010) | 1.9% |
| Dan Rogerson | North Cornwall | LDem | (2010-2015) | 2.2% |
| Lord Rogers of Riverside | (Lords) | Lab | (1996-2021) | 2.4% |
| Lord Roll of Ipsden | (Lords) | Crossbench | (1977-2005) | 51.2% |
| Rona Mackay | Strathkelvin and Bearsden | SNP | (2016-2021) | n/a |
| Rona Mackay | Strathkelvin and Bearsden | SNP | (2021-present) | n/a |
| Lord Rooker | (Lords) | Lab | (2001-present) | 2.0% |
| Mr Jeff Rooker | Birmingham, Perry Barr | Lab | (1997-2001) | 0.9% |
| Ian Roome | North Devon | LDem | (2024-present) | 0.0% |
| Terry Rooney | Bradford North | Lab | (1997-2001) | 0.4% |
| Terry Rooney | Bradford North | Lab | (2001-2005) | 1.1% |
| Terry Rooney | Bradford North | Lab | (2005-2010) | 1.0% |
| Lord Roper | (Lords) | LDem | (2000-2015) | 0.8% |
| Roseanna Cunningham | Perth | SNP | (2003-2007) | 1.7% |
| Roseanna Cunningham | Perth | SNP | (1999-2003) | 1.9% |
| Roseanna Cunningham | Perth | SNP | (2007-2011) | 0.2% |
| Roseanna Cunningham | Perthshire South and Kinross-shire | SNP | (2011-2016) | n/a |
| Roseanna Cunningham | Perthshire South and Kinross-shire | SNP | (2016-2021) | n/a |
| Ms Rosemary Byrne | South of Scotland | whilst SG | (2006-2007) | 0.0% |
| Ms Rosemary Byrne | South of Scotland | whilst SSP | (2003-2006) | 1.2% |
| Lord Rose of Monewden | (Lords) | Con | (2014-present) | 0.0% |
| Lord Rosenfield | (Lords) | Con | (2023-present) | 0.0% |
| Rosie Kane | Glasgow | SSP | (2003-2007) | 0.5% |
| Andrew Rosindell | Romford | Con | (2001-2005) | 1.0% |
| Andrew Rosindell | Romford | Con | (2005-2010) | 1.3% |
| Andrew Rosindell | Romford | Con | (2010-2015) | 2.3% |
| Andrew Rosindell | Romford | Con | (2015-2017) | 1.3% |
| Andrew Rosindell | Romford | Con | (2017-2019) | 4.1% |
| Andrew Rosindell | Romford | Con | (2019-2024) | 4.9% |
| Andrew Rosindell | Romford | Con | (2024-present) | 0.0% |
| Ross Thomson | North East Scotland | Con | (2016-2017) | n/a |
| Ross Finnie | West of Scotland | LDem | (2003-2007) | 0.0% |
| Ross Finnie | West of Scotland | LDem | (1999-2003) | 1.0% |
| Ross Finnie | West of Scotland | LDem | (2007-2011) | 0.4% |
| Ross Greer | West Scotland | Green | (2016-2021) | n/a |
| Ross Greer | West Scotland | Green | (2021-present) | n/a |
| Douglas Ross | Moray | Con | (2017-2019) | 1.9% |
| Douglas Ross | Moray | Con | (2019-2024) | 0.4% |
| Lord Rosser | (Lords) | Lab | (2004-2024) | 0.3% |
| Mr Ernie Ross | Dundee West | Lab | (1997-2001) | 0.2% |
| Mr Ernie Ross | Dundee West | Lab | (2001-2005) | 0.4% |
| The Earl of Rosslyn | (Lords) | Crossbench | (1977-present) | 0.0% |
| Mr William Ross | East Londonderry | UUP | (1997-2001) | 0.8% |
| Steve Rotheram | Liverpool, Walton | Lab | (2010-2015) | 0.5% |
| Steve Rotheram | Liverpool, Walton | Lab | (2015-2017) | 0.3% |
| Lord Rotherwick | (Lords) | Con | (1996-2022) | 1.0% |
| Lord Rowe-Beddoe | (Lords) | Crossbench | (2006-2023) | 25.1% |
| Mr Andrew Rowe | Faversham and Mid Kent | Con | (1997-2001) | 0.8% |
| Paul Rowen | Rochdale | LDem | (2005-2010) | 3.1% |
| Lord Rowlands | (Lords) | Lab | (2004-present) | 0.4% |
| Mr Ted Rowlands | Merthyr Tydfil and Rhymney | Lab | (1997-2001) | 2.0% |
| Danielle Rowley | Midlothian | Lab | (2017-2019) | 0.3% |
| Lee Rowley | North East Derbyshire | Con | (2017-2019) | 2.8% |
| Lee Rowley | North East Derbyshire | Con | (2019-2024) | 0.3% |
| Baroness Royall of Blaisdon | (Lords) | Lab | (2004-present) | 0.4% |
| Frank Roy | Motherwell and Wishaw | Lab | (2001-2005) | 1.7% |
| Frank Roy | Motherwell and Wishaw | Lab | (2005-2010) | 2.2% |
| Frank Roy | Motherwell and Wishaw | Lab | (2010-2015) | 1.0% |
| Frank Roy | Motherwell and Wishaw | Lab | (1997-2001) | 0.2% |
| Lindsay Roy | Glenrothes | Lab | (2008-2010) | 0.0% |
| Lindsay Roy | Glenrothes | Lab | (2010-2015) | 0.2% |
| Roz McCall | Mid Scotland and Fife | Con | (2022-present) | n/a |
| Chris Ruane | Vale of Clwyd | Lab | (1997-2001) | 0.1% |
| Chris Ruane | Vale of Clwyd | Lab | (2001-2005) | 1.1% |
| Chris Ruane | Vale of Clwyd | Lab | (2005-2010) | 1.2% |
| Chris Ruane | Vale of Clwyd | Lab | (2010-2015) | 0.1% |
| Chris Ruane | Vale of Clwyd | Lab | (2017-2019) | 0.3% |
| Amber Rudd | Hastings and Rye | Con | (2010-2015) | 0.9% |
| Amber Rudd | Hastings and Rye | Con | (2015-2017) | 0.0% |
| Amber Rudd | Hastings and Rye | whilst Con | (2017-2019) | 1.5% |
| Amber Rudd | Hastings and Rye | whilst Independent | (2019-2019) | n/a |
| Joan Ruddock | Lewisham, Deptford | Lab | (1997-2001) | 0.2% |
| Joan Ruddock | Lewisham, Deptford | Lab | (2001-2005) | 1.2% |
| Joan Ruddock | Lewisham, Deptford | Lab | (2005-2010) | 0.8% |
| Joan Ruddock | Lewisham, Deptford | Lab | (2010-2015) | 0.1% |
| David Ruffley | Bury St Edmunds | Con | (1997-2001) | 0.5% |
| David Ruffley | Bury St Edmunds | Con | (2001-2005) | 0.6% |
| David Ruffley | Bury St Edmunds | Con | (2005-2010) | 0.3% |
| David Ruffley | Bury St Edmunds | Con | (2010-2015) | 1.5% |
| Lord Runcie | (Lords) | Crossbench | (1991-2000) | n/a |
| Sam Rushworth | Bishop Auckland | Lab | (2024-present) | 1.8% |
| Earl Russell | (Lords) | LDem | (1987-2004) | 0.7% |
| Earl Russell | (Lords) | LDem | (2023-present) | 0.0% |
| Russell Findlay | West Scotland | Con | (2021-present) | n/a |
| Lord Russell-Johnston | (Lords) | LDem | (1997-2008) | 3.8% |
| Lloyd Russell-Moyle | Brighton, Kemptown | Lab | (2017-2019) | 0.3% |
| Lloyd Russell-Moyle | Brighton, Kemptown | Lab | (2019-2024) | 0.0% |
| Bob Russell | Colchester | LDem | (1997-2001) | 2.1% |
| Bob Russell | Colchester | LDem | (2001-2005) | 2.4% |
| Bob Russell | Colchester | LDem | (2005-2010) | 2.8% |
| Bob Russell | Colchester | LDem | (2010-2015) | 3.5% |
| Christine Russell | City of Chester | Lab | (1997-2001) | 0.0% |
| Christine Russell | City of Chester | Lab | (2001-2005) | 0.5% |
| Christine Russell | City of Chester | Lab | (2005-2010) | 0.4% |
| Dean Russell | Watford | Con | (2019-2024) | 0.0% |
| Lord Russell of Liverpool | (Lords) | Crossbench | (2014-present) | 6.1% |
| Sarah Russell | Congleton | Lab | (2024-present) | 0.0% |
| Ruth Maguire | Cunninghame South | SNP | (2016-2021) | n/a |
| Ruth Maguire | Cunninghame South | SNP | (2021-present) | n/a |
| Ruth Davidson | Edinburgh Central | Con | (2016-2021) | n/a |
| Ruth Davidson | Glasgow | Con | (2011-2016) | n/a |
| Tom Rutland | East Worthing and Shoreham | Lab | (2024-present) | 0.5% |
| David Rutley | Macclesfield | Con | (2010-2015) | 0.8% |
| David Rutley | Macclesfield | Con | (2015-2017) | 0.0% |
| David Rutley | Macclesfield | Con | (2017-2019) | 0.2% |
| David Rutley | Macclesfield | Con | (2019-2024) | 0.1% |
| Joan Ryan | Enfield North | whilst Independent | (2019-2019) | n/a |
| Joan Ryan | Enfield North | Lab | (1997-2001) | 0.0% |
| Joan Ryan | Enfield North | Lab | (2001-2005) | 0.8% |
| Joan Ryan | Enfield North | Lab | (2005-2010) | 0.3% |
| Joan Ryan | Enfield North | Lab | (2015-2017) | 0.8% |
| Joan Ryan | Enfield North | whilst Lab | (2017-2019) | 0.0% |
| Oliver Ryan | Burnley | Lab | (2024-present) | 0.0% |
| Lord Ryder of Eaton Hastings | (Lords) | Other | (1975-2003) | n/a |
| Baroness Ryder of Warsaw | (Lords) | Crossbench | (1979-2000) | n/a |
| Lord Ryder of Wensum | (Lords) | Con | (1997-2021) | 0.8% |
| Lord Saatchi | (Lords) | Con | (1996-present) | 0.9% |
| Anna Sabine | Frome and East Somerset | LDem | (2024-present) | 0.0% |
| Sarah Sackman | Finchley and Golders Green | Lab | (2024-present) | 0.0% |
| Lord Sacks | (Lords) | Crossbench | (2009-2020) | n/a |
| Lord Sahota | (Lords) | Lab | (2022-present) | 0.0% |
| Lord Sainsbury of Preston Candover | (Lords) | Con | (1989-2022) | 3.0% |
| Lord Sainsbury of Turville | (Lords) | Lab | (1997-2021) | 0.0% |
| The Bishop of Salisbury | (Lords) | Bishop | (1998-2010) | 0.0% |
| The Bishop of Salisbury | (Lords) | Bishop | (2015-2021) | 0.0% |
| The Marquess of Salisbury | (Lords) | Con | (1992-2017) | n/a |
| Alex Salmond | Banff and Buchan | SNP | (1997-2001) | 0.0% |
| Alex Salmond | Banff and Buchan | SNP | (2001-2005) | 0.6% |
| Alex Salmond | Banff and Buchan | SNP | (2005-2010) | 0.5% |
| Alex Salmond | Gordon | SNP | (2015-2017) | 0.0% |
| Martin Salter | Reading West | Lab | (1997-2001) | 1.5% |
| Martin Salter | Reading West | Lab | (2001-2005) | 1.7% |
| Martin Salter | Reading West | Lab | (2005-2010) | 1.2% |
| Lady Saltoun of Abernethy | (Lords) | Crossbench | (1979-2014) | 26.0% |
| Sam Galbraith | Strathkelvin and Bearsden | Lab | (1999-2001) | 0.8% |
| Gary Sambrook | Birmingham, Northfield | Con | (2019-2024) | 1.6% |
| Antoinette Sandbach | Eddisbury | Con | (2015-2017) | 0.3% |
| Antoinette Sandbach | Eddisbury | whilst Con | (2017-2019) | 12.9% |
| Antoinette Sandbach | Eddisbury | whilst Independent | (2019-2019) | n/a |
| Lord Sandberg | (Lords) | LDem | (1997-2015) | 3.3% |
| Adrian Sanders | Torbay | LDem | (1997-2001) | 1.3% |
| Adrian Sanders | Torbay | LDem | (2001-2005) | 1.7% |
| Adrian Sanders | Torbay | LDem | (2005-2010) | 0.8% |
| Adrian Sanders | Torbay | LDem | (2010-2015) | 7.3% |
| Lord Sanderson of Bowden | (Lords) | Con | (1985-2018) | 0.6% |
| Baroness Sanderson of Welton | (Lords) | Con | (2019-present) | 0.4% |
| Sandesh Gulhane | Glasgow | Con | (2021-present) | n/a |
| Jeevun Sandher | Loughborough | Lab | (2024-present) | 0.0% |
| Lord Sandhurst | (Lords) | Con | (2021-present) | 0.2% |
| Sandra White | Glasgow | SNP | (2003-2007) | 1.9% |
| Sandra White | Glasgow | SNP | (1999-2003) | 1.2% |
| Sandra White | Glasgow | SNP | (2007-2011) | 0.2% |
| Sandra White | Glasgow Kelvin | SNP | (2011-2016) | n/a |
| Sandra White | Glasgow Kelvin | SNP | (2016-2021) | n/a |
| The Earl of Sandwich | (Lords) | Crossbench | (1995-2024) | 18.8% |
| Laura Sandys | South Thanet | Con | (2010-2015) | 1.1% |
| Sarah Boyack | Edinburgh Central | Lab | (2003-2007) | 0.3% |
| Sarah Boyack | Edinburgh Central | Lab | (1999-2003) | 0.3% |
| Sarah Boyack | Edinburgh Central | Lab | (2007-2011) | 0.2% |
| Sarah Boyack | Lothian | Lab | (2011-2016) | n/a |
| Sarah Boyack | Lothian | Lab | (2019-2021) | n/a |
| Sarah Boyack | Lothian | Lab | (2021-present) | n/a |
| Lord Sarfraz | (Lords) | Con | (2020-present) | 0.2% |
| Anas Sarwar | Glasgow Central | Lab | (2010-2015) | 0.0% |
| Mohammad Sarwar | Glasgow Central | Lab | (2005-2010) | 1.6% |
| Mohammad Sarwar | Glasgow Govan | Lab | (1997-2001) | 0.9% |
| Mohammad Sarwar | Glasgow Govan | Lab | (2001-2005) | 1.6% |
| Lord Sassoon | (Lords) | Con | (2010-present) | 0.5% |
| Baroness Sater | (Lords) | Con | (2018-present) | 0.2% |
| Roz Savage | South Cotswolds | LDem | (2024-present) | 0.0% |
| Mr Malcolm Savidge | Aberdeen North | Lab | (1997-2001) | 0.6% |
| Mr Malcolm Savidge | Aberdeen North | Lab | (2001-2005) | 1.3% |
| Liz Saville-Roberts | Dwyfor Meirionnydd | PC | (2015-2017) | 0.0% |
| Liz Saville-Roberts | Dwyfor Meirionnydd | PC | (2017-2019) | 0.0% |
| Liz Saville-Roberts | Dwyfor Meirionnydd | PC | (2019-2024) | 0.0% |
| Liz Saville-Roberts | Dwyfor Meirionnydd | PC | (2024-present) | 0.9% |
| Lord Saville of Newdigate | (Lords) | Crossbench | (1997-2024) | 0.0% |
| Andy Sawford | Corby | Lab | (2012-2015) | 0.0% |
| Mr Phil Sawford | Kettering | Lab | (1997-2001) | 0.9% |
| Mr Phil Sawford | Kettering | Lab | (2001-2005) | 2.5% |
| Lord Sawyer | (Lords) | Lab | (1998-present) | 0.7% |
| Selaine Saxby | North Devon | Con | (2019-2024) | 0.2% |
| Mr Jonathan Sayeed | Mid Bedfordshire | Con | (1997-2001) | 0.7% |
| Mr Jonathan Sayeed | Mid Bedfordshire | whilst Con | (2001-2005) | 0.4% |
| Mr Jonathan Sayeed | Mid Bedfordshire | whilst Independent | (2005-2005) | n/a |
| Lord Scanlon | (Lords) | Lab | (1979-2004) | n/a |
| Lord Scarman | (Lords) | Crossbench | (1977-2004) | n/a |
| Baroness Scotland of Asthal | (Lords) | Lab | (1997-present) | 0.4% |
| Scott Barrie | Dunfermline West | Lab | (2003-2007) | 0.2% |
| Scott Barrie | Dunfermline West | Lab | (1999-2003) | 0.6% |
| Baroness Scott of Bybrook | (Lords) | Con | (2015-present) | 0.1% |
| Lord Scott of Foscote | (Lords) | Crossbench | (2000-2016) | 21.9% |
| Lee Scott | Ilford North | Con | (2005-2010) | 1.2% |
| Lee Scott | Ilford North | Con | (2010-2015) | 0.8% |
| Baroness Scott of Needham Market | (Lords) | LDem | (2000-present) | 0.3% |
| Lord Scriven | (Lords) | LDem | (2014-present) | 0.4% |
| Michelle Scrogham | Barrow and Furness | Lab | (2024-present) | 1.9% |
| Paul Scully | Sutton and Cheam | Con | (2015-2017) | 0.3% |
| Paul Scully | Sutton and Cheam | Con | (2017-2019) | 0.5% |
| Paul Scully | Sutton and Cheam | Con | (2019-2024) | 0.0% |
| Alison Seabeck | Plymouth, Devonport | Lab | (2005-2010) | 0.4% |
| Alison Seabeck | Plymouth, Moor View | Lab | (2010-2015) | 0.2% |
| Baroness Seccombe | (Lords) | Con | (1991-present) | 0.7% |
| Mr Brian Sedgemore | Hackney South and Shoreditch | Lab | (1997-2001) | 1.6% |
| Mr Brian Sedgemore | Hackney South and Shoreditch | Lab | (2001-2005) | 11.7% |
| Lord Sedwill | (Lords) | Crossbench | (2020-present) | 0.0% |
| Bob Seely | Isle of Wight | Con | (2017-2019) | 1.4% |
| Bob Seely | Isle of Wight | Con | (2019-2024) | 1.2% |
| Lord Sefton of Garston | (Lords) | Lab | (1978-2001) | n/a |
| The Earl of Selborne | (Lords) | Con | (1971-2019) | 1.8% |
| The Earl of Selborne | (Lords) | Non-affiliated | (2019-2020) | 66.7% |
| Lord Selkirk of Douglas | (Lords) | Con | (1997-2023) | 0.6% |
| Andrew Selous | South West Bedfordshire | Con | (2001-2005) | 1.1% |
| Andrew Selous | South West Bedfordshire | Con | (2005-2010) | 1.7% |
| Andrew Selous | South West Bedfordshire | Con | (2010-2015) | 1.1% |
| Andrew Selous | South West Bedfordshire | Con | (2015-2017) | 0.0% |
| Andrew Selous | South West Bedfordshire | Con | (2017-2019) | 0.2% |
| Andrew Selous | South West Bedfordshire | Con | (2019-2024) | 0.4% |
| Lord Selsdon | (Lords) | Con | (1963-2021) | 1.2% |
| Lord Sentamu | (Lords) | Crossbench | (2021-present) | 15.8% |
| Baroness Serota | (Lords) | Lab | (1967-2002) | 0.0% |
| Mark Sewards | Leeds South West and Morley | Lab | (2024-present) | 0.0% |
| Lord Sewel | (Lords) | Lab | (1996-2012) | 0.4% |
| Lord Sewel | (Lords) | Non-affiliated | (2012-2015) | n/a |
| Lord Sewell of Sanderstead | (Lords) | Con | (2022-present) | 0.0% |
| Baroness Shackleton of Belgravia | (Lords) | Con | (2010-present) | 2.1% |
| Baroness Shafik | (Lords) | Crossbench | (2020-present) | 30.0% |
| Naseem Shah | Bradford West | Lab | (2015-2017) | 0.8% |
| Naseem Shah | Bradford West | Lab | (2017-2019) | 0.0% |
| Naseem Shah | Bradford West | Lab | (2019-2024) | 0.0% |
| Naseem Shah | Bradford West | Lab | (2024-present) | 2.0% |
| Lord Shamash | (Lords) | Lab | (2024-present) | 0.0% |
| Baggy Shanker | Derby South | Lab | (2024-present) | 0.6% |
| Michael Shanks | Rutherglen | Lab | (2024-present) | 1.9% |
| Michael Shanks | Rutherglen and Hamilton West | Lab | (2023-2024) | 0.0% |
| Jim Shannon | Strangford | DUP | (2010-2015) | 1.9% |
| Jim Shannon | Strangford | DUP | (2015-2017) | 2.7% |
| Jim Shannon | Strangford | DUP | (2017-2019) | 0.2% |
| Jim Shannon | Strangford | DUP | (2019-2024) | 1.7% |
| Jim Shannon | Strangford | DUP | (2024-present) | 0.0% |
| Grant Shapps | Welwyn Hatfield | Con | (2005-2010) | 2.1% |
| Grant Shapps | Welwyn Hatfield | Con | (2010-2015) | 0.7% |
| Grant Shapps | Welwyn Hatfield | Con | (2015-2017) | 0.3% |
| Grant Shapps | Welwyn Hatfield | Con | (2017-2019) | 0.7% |
| Grant Shapps | Welwyn Hatfield | Con | (2019-2024) | 0.1% |
| Lord Sharkey | (Lords) | LDem | (2010-present) | 1.3% |
| Lord Sharma | (Lords) | Con | (2024-present) | 0.0% |
| Alok Sharma | Reading West | Con | (2010-2015) | 0.4% |
| Alok Sharma | Reading West | Con | (2015-2017) | 0.0% |
| Alok Sharma | Reading West | Con | (2017-2019) | 0.9% |
| Alok Sharma | Reading West | Con | (2019-2024) | 0.0% |
| Lord Sharman | (Lords) | LDem | (1999-2015) | 2.4% |
| Virendra Sharma | Ealing, Southall | Lab | (2007-2010) | 1.0% |
| Virendra Sharma | Ealing, Southall | Lab | (2010-2015) | 0.3% |
| Virendra Sharma | Ealing, Southall | Lab | (2015-2017) | 1.6% |
| Virendra Sharma | Ealing, Southall | Lab | (2017-2019) | 0.0% |
| Virendra Sharma | Ealing, Southall | Lab | (2019-2024) | 0.0% |
| Sharon Dowey | South Scotland | Con | (2021-present) | n/a |
| Lord Sharpe of Epsom | (Lords) | Con | (2020-present) | 0.3% |
| Baroness Sharp of Guildford | (Lords) | LDem | (1998-2016) | 1.0% |
| Baroness Sharples | (Lords) | Con | (1973-2017) | 1.3% |
| Neil Shastri-Hurst | Solihull West and Shirley | Con | (2024-present) | 3.4% |
| Lord Shawcross | (Lords) | Crossbench | (1959-2003) | n/a |
| Jonathan R Shaw | Chatham and Aylesford | Lab | (1997-2001) | 1.0% |
| Jonathan R Shaw | Chatham and Aylesford | Lab | (2001-2005) | 1.7% |
| Jonathan R Shaw | Chatham and Aylesford | Lab | (2005-2010) | 0.5% |
| Lord Shaw of Northstead | (Lords) | Con | (1994-2015) | 0.8% |
| Baroness Sheehan | (Lords) | LDem | (2015-present) | 0.1% |
| Barry Sheerman | Huddersfield | Lab | (1997-2001) | 1.2% |
| Barry Sheerman | Huddersfield | Lab | (2001-2005) | 3.5% |
| Barry Sheerman | Huddersfield | Lab | (2005-2010) | 1.3% |
| Barry Sheerman | Huddersfield | Lab | (2010-2015) | 2.0% |
| Barry Sheerman | Huddersfield | Lab | (2015-2017) | 1.8% |
| Barry Sheerman | Huddersfield | Lab | (2017-2019) | 0.5% |
| Barry Sheerman | Huddersfield | Lab | (2019-2024) | 0.0% |
| The Bishop of Sheffield | (Lords) | Bishop | (2003-2008) | 0.0% |
| The Bishop of Sheffield | (Lords) | Bishop | (2013-2016) | 0.0% |
| The Bishop of Sheffield | (Lords) | Bishop | (2023-present) | 0.0% |
| Lord Sheikh | (Lords) | Con | (2006-2022) | 0.8% |
| Alec Shelbrooke | Elmet and Rothwell | Con | (2010-2015) | 0.4% |
| Alec Shelbrooke | Elmet and Rothwell | Con | (2015-2017) | 0.3% |
| Alec Shelbrooke | Elmet and Rothwell | Con | (2017-2019) | 0.8% |
| Alec Shelbrooke | Elmet and Rothwell | Con | (2019-2024) | 0.4% |
| Alec Shelbrooke | Wetherby and Easingwold | Con | (2024-present) | 0.0% |
| Lord Sheldon | (Lords) | Lab | (2001-2015) | 5.2% |
| Mr Robert Sheldon | Ashton-under-Lyne | Lab | (1997-2001) | 1.5% |
| Mrs Gillian Shephard | South West Norfolk | Con | (1997-2001) | 0.3% |
| Mrs Gillian Shephard | South West Norfolk | Con | (2001-2005) | 0.3% |
| Baroness Shephard of Northwold | (Lords) | Con | (2005-present) | 0.2% |
| Lord Shepherd | (Lords) | Lab | (1954-2001) | 0.0% |
| Richard Shepherd | Aldridge-Brownhills | Con | (1997-2001) | 0.6% |
| Richard Shepherd | Aldridge-Brownhills | Con | (2001-2005) | 1.4% |
| Richard Shepherd | Aldridge-Brownhills | Con | (2005-2010) | 3.9% |
| Richard Shepherd | Aldridge-Brownhills | Con | (2010-2015) | 11.1% |
| Lord Sheppard of Didgemere | (Lords) | Con | (1994-2015) | 0.0% |
| Lord Sheppard of Liverpool | (Lords) | Lab | (1998-2005) | 0.0% |
| Tommy Sheppard | Edinburgh East | SNP | (2015-2017) | 0.0% |
| Tommy Sheppard | Edinburgh East | SNP | (2017-2019) | 0.0% |
| Tommy Sheppard | Edinburgh East | SNP | (2019-2024) | 0.0% |
| Lord Sherbourne of Didsbury | (Lords) | Con | (2013-present) | 0.8% |
| Jim Sheridan | Paisley and Renfrewshire North | Lab | (2005-2010) | 1.0% |
| Jim Sheridan | Paisley and Renfrewshire North | Lab | (2010-2015) | 1.5% |
| Jim Sheridan | West Renfrewshire | Lab | (2001-2005) | 1.1% |
| Baroness Sherlock | (Lords) | Lab | (2010-present) | 0.3% |
| Paula Sherriff | Dewsbury | Lab | (2015-2017) | 0.3% |
| Paula Sherriff | Dewsbury | Lab | (2017-2019) | 0.0% |
| Mr Michael Shersby | Uxbridge | Con | (1997-1997) | n/a |
| Baroness Shields | (Lords) | Con | (2014-present) | 0.2% |
| Lord Shinkwin | (Lords) | Con | (2015-present) | 4.0% |
| Shiona Baird | North East Scotland | Green | (2003-2007) | 0.9% |
| Lord Shipley | (Lords) | LDem | (2010-present) | 1.5% |
| Ms Debra Shipley | Stourbridge | Lab | (1997-2001) | 0.5% |
| Ms Debra Shipley | Stourbridge | Lab | (2001-2005) | 1.2% |
| Shirley-Anne Somerville | Dunfermline | SNP | (2016-2021) | n/a |
| Shirley-Anne Somerville | Dunfermline | SNP | (2021-present) | n/a |
| Shirley-Anne Somerville | Lothians | SNP | (2007-2011) | 0.4% |
| Shona Robison | Dundee City East | SNP | (2011-2016) | n/a |
| Shona Robison | Dundee City East | SNP | (2016-2021) | n/a |
| Shona Robison | Dundee City East | SNP | (2021-present) | n/a |
| Shona Robison | Dundee East | SNP | (2003-2007) | 0.5% |
| Shona Robison | Dundee East | SNP | (2007-2011) | 0.0% |
| Shona Robison | North East Scotland | SNP | (1999-2003) | 1.4% |
| Lord Shore of Stepney | (Lords) | Lab | (1997-2001) | 14.9% |
| Clare Short | Birmingham, Ladywood | whilst Independent Labour | (2006-2010) | n/a |
| Clare Short | Birmingham, Ladywood | Lab | (1997-2001) | 0.0% |
| Clare Short | Birmingham, Ladywood | Lab | (2001-2005) | 10.2% |
| Clare Short | Birmingham, Ladywood | whilst Lab | (2005-2006) | 18.4% |
| The Earl of Shrewsbury | (Lords) | Con | (1980-present) | 0.6% |
| Gavin Shuker | Luton South | whilst Independent | (2019-2019) | n/a |
| Gavin Shuker | Luton South | Lab | (2010-2015) | 0.4% |
| Gavin Shuker | Luton South | Lab | (2015-2017) | 0.0% |
| Gavin Shuker | Luton South | whilst Lab | (2017-2019) | 0.8% |
| Lord Shutt of Greetland | (Lords) | LDem | (2000-2020) | 0.8% |
| Tulip Siddiq | Hampstead and Highgate | Lab | (2024-present) | 0.0% |
| Tulip Siddiq | Hampstead and Kilburn | Lab | (2015-2017) | 3.0% |
| Tulip Siddiq | Hampstead and Kilburn | Lab | (2017-2019) | 0.3% |
| Tulip Siddiq | Hampstead and Kilburn | Lab | (2019-2024) | 0.0% |
| Lord Sieff of Brimpton | (Lords) | Con | (1980-2001) | n/a |
| Lord Sikka | (Lords) | Lab | (2020-present) | 0.8% |
| David Simmonds | Ruislip, Northwood and Pinner | Con | (2019-2024) | 0.8% |
| David Simmonds | Ruislip, Northwood and Pinner | Con | (2024-present) | 1.3% |
| Mark Simmonds | Boston and Skegness | Con | (2001-2005) | 0.5% |
| Mark Simmonds | Boston and Skegness | Con | (2005-2010) | 1.9% |
| Mark Simmonds | Boston and Skegness | Con | (2010-2015) | 0.5% |
| Viscount Simon | (Lords) | Lab | (1993-2021) | 2.1% |
| Lord Simon of Glaisdale | (Lords) | Crossbench | (1971-2006) | 20.5% |
| Lord Simon of Highbury | (Lords) | Lab | (1997-2005) | 0.0% |
| Lord Simon of Highbury | (Lords) | Lab | (2008-2010) | n/a |
| Lord Simon of Highbury | (Lords) | Non-affiliated | (2010-2017) | n/a |
| Lord Simon of Highbury | (Lords) | Other | (2005-2008) | n/a |
| Siôn Simon | Birmingham, Erdington | Lab | (2005-2010) | 0.3% |
| Siôn Simon | Birmingham, Erdington | Lab | (2001-2005) | 0.8% |
| Josh Simons | Makerfield | Lab | (2024-present) | 0.0% |
| Alan Simpson | Nottingham South | Lab | (1997-2001) | 5.2% |
| Alan Simpson | Nottingham South | Lab | (2001-2005) | 14.6% |
| Alan Simpson | Nottingham South | Lab | (2005-2010) | 20.7% |
| David Simpson | Upper Bann | DUP | (2005-2010) | 0.2% |
| David Simpson | Upper Bann | DUP | (2010-2015) | 0.2% |
| David Simpson | Upper Bann | DUP | (2015-2017) | 0.0% |
| David Simpson | Upper Bann | DUP | (2017-2019) | 0.0% |
| Lord Simpson of Dunkeld | (Lords) | Lab | (1997-2004) | 0.0% |
| Lord Simpson of Dunkeld | (Lords) | Lab | (2005-2005) | n/a |
| Lord Simpson of Dunkeld | (Lords) | Lab | (2010-2012) | n/a |
| Lord Simpson of Dunkeld | (Lords) | Non-affiliated | (2012-2015) | n/a |
| Lord Simpson of Dunkeld | (Lords) | Other | (2004-2005) | n/a |
| Lord Simpson of Dunkeld | (Lords) | Other | (2005-2010) | n/a |
| Keith Simpson | Broadland | Con | (2010-2015) | 0.8% |
| Keith Simpson | Broadland | Con | (2015-2017) | 0.0% |
| Keith Simpson | Broadland | Con | (2017-2019) | 1.6% |
| Keith Simpson | Mid Norfolk | Con | (1997-2001) | 0.2% |
| Keith Simpson | Mid Norfolk | Con | (2001-2005) | 0.5% |
| Keith Simpson | Mid Norfolk | Con | (2005-2010) | 0.9% |
| Marsha Singh | Bradford West | Lab | (1997-2001) | 0.5% |
| Marsha Singh | Bradford West | Lab | (2001-2005) | 1.6% |
| Marsha Singh | Bradford West | Lab | (2005-2010) | 2.6% |
| Marsha Singh | Bradford West | Lab | (2010-2012) | 2.5% |
| Lord Singh of Wimbledon | (Lords) | Crossbench | (2011-present) | 19.7% |
| Siobhan McMahon | Central Scotland | Lab | (2011-2016) | n/a |
| Siobhian Brown | Ayr | SNP | (2021-present) | n/a |
| Lord Skelmersdale | (Lords) | Con | (1973-2018) | 1.2% |
| Lord Skidelsky | (Lords) | Crossbench | (1991-present) | 30.5% |
| Chris Skidmore | Kingswood | Con | (2010-2015) | 0.9% |
| Chris Skidmore | Kingswood | Con | (2015-2017) | 0.0% |
| Chris Skidmore | Kingswood | Con | (2017-2019) | 1.6% |
| Chris Skidmore | Kingswood | Con | (2019-2024) | 1.3% |
| Dennis Skinner | Bolsover | Lab | (1997-2001) | 4.6% |
| Dennis Skinner | Bolsover | Lab | (2001-2005) | 10.5% |
| Dennis Skinner | Bolsover | Lab | (2005-2010) | 5.7% |
| Dennis Skinner | Bolsover | Lab | (2010-2015) | 4.6% |
| Dennis Skinner | Bolsover | Lab | (2015-2017) | 3.5% |
| Dennis Skinner | Bolsover | Lab | (2017-2019) | 6.1% |
| Vikki Slade | Mid Dorset and North Poole | LDem | (2024-present) | 0.0% |
| Andrew Slaughter | Ealing, Acton and Shepherd's Bush | Lab | (2005-2010) | 0.8% |
| Andrew Slaughter | Hammersmith | Lab | (2010-2015) | 0.0% |
| Andrew Slaughter | Hammersmith | Lab | (2015-2017) | 1.2% |
| Andrew Slaughter | Hammersmith | Lab | (2017-2019) | 0.3% |
| Andrew Slaughter | Hammersmith | Lab | (2019-2024) | 0.1% |
| Andrew Slaughter | Hammersmith and Chiswick | Lab | (2024-present) | 0.0% |
| Viscount Slim | (Lords) | Crossbench | (1970-2019) | 24.7% |
| John Slinger | Rugby | Lab | (2024-present) | 0.0% |
| Lord Slynn of Hadley | (Lords) | Crossbench | (1992-2009) | 15.4% |
| Lisa Smart | Hazel Grove | LDem | (2024-present) | 0.0% |
| Ruth Smeeth | Stoke-on-Trent North | Lab | (2015-2017) | 1.0% |
| Ruth Smeeth | Stoke-on-Trent North | Lab | (2017-2019) | 2.2% |
| Alyn Smith | Stirling | SNP | (2019-2024) | 0.0% |
| Andrew Smith | Oxford East | Lab | (1997-2001) | 0.0% |
| Andrew Smith | Oxford East | Lab | (2001-2005) | 0.2% |
| Andrew Smith | Oxford East | Lab | (2005-2010) | 1.3% |
| Andrew Smith | Oxford East | Lab | (2010-2015) | 1.2% |
| Andrew Smith | Oxford East | Lab | (2015-2017) | 1.2% |
| Angela Smith | Basildon | Lab | (1997-2001) | 0.7% |
| Angela Smith | Basildon | Lab | (2001-2005) | 1.5% |
| Angela Smith | Basildon | Lab | (2005-2010) | 0.5% |
| Angela Smith | Penistone and Stocksbridge | whilst Independent | (2019-2019) | n/a |
| Angela Smith | Penistone and Stocksbridge | Lab | (2010-2015) | 0.3% |
| Angela Smith | Penistone and Stocksbridge | Lab | (2015-2017) | 1.0% |
| Angela Smith | Penistone and Stocksbridge | whilst Lab | (2017-2019) | 1.2% |
| Angela Smith | Sheffield, Hillsborough | Lab | (2005-2010) | 0.5% |
| Baroness Smith of Basildon | (Lords) | Lab | (2010-present) | 0.4% |
| Cat Smith | Lancaster and Fleetwood | Lab | (2015-2017) | 0.6% |
| Cat Smith | Lancaster and Fleetwood | Lab | (2017-2019) | 0.0% |
| Cat Smith | Lancaster and Fleetwood | Lab | (2019-2024) | 0.0% |
| Cat Smith | Lancaster and Wyre | Lab | (2024-present) | 0.0% |
| Chloe Smith | Norwich North | Con | (2010-2015) | 0.9% |
| Chloe Smith | Norwich North | Con | (2009-2010) | 0.0% |
| Chloe Smith | Norwich North | Con | (2015-2017) | 0.3% |
| Chloe Smith | Norwich North | Con | (2017-2019) | 0.9% |
| Chloe Smith | Norwich North | Con | (2019-2024) | 0.1% |
| Mr Chris Smith | Islington South and Finsbury | Lab | (1997-2001) | 0.4% |
| Mr Chris Smith | Islington South and Finsbury | Lab | (2001-2005) | 1.4% |
| Lord Smith of Clifton | (Lords) | LDem | (1997-2019) | 2.0% |
| Baroness Smith of Cluny | (Lords) | Lab | (2024-present) | 0.0% |
| David Smith | North Northumberland | Lab | (2024-present) | 1.8% |
| Eleanor Smith | Wolverhampton South West | Lab | (2017-2019) | 0.0% |
| Lord Smith of Finsbury | (Lords) | Lab | (2005-2008) | 4.4% |
| Lord Smith of Finsbury | (Lords) | Non-affiliated | (2008-present) | 10.3% |
| Geraldine Smith | Morecambe and Lunesdale | Lab | (1997-2001) | 0.9% |
| Geraldine Smith | Morecambe and Lunesdale | Lab | (2001-2005) | 3.9% |
| Geraldine Smith | Morecambe and Lunesdale | Lab | (2005-2010) | 4.6% |
| Baroness Smith of Gilmorehill | (Lords) | Lab | (1995-present) | 0.8% |
| Greg Smith | Buckingham | Con | (2019-2024) | 2.0% |
| Greg Smith | Mid Buckinghamshire | Con | (2024-present) | 0.0% |
| Henry Smith | Crawley | Con | (2010-2015) | 3.2% |
| Henry Smith | Crawley | Con | (2015-2017) | 0.2% |
| Henry Smith | Crawley | Con | (2017-2019) | 3.7% |
| Henry Smith | Crawley | Con | (2019-2024) | 3.4% |
| Lord Smith of Hindhead | (Lords) | Con | (2015-present) | 0.0% |
| Jacqui Smith | Redditch | Lab | (1997-2001) | 0.1% |
| Jacqui Smith | Redditch | Lab | (2001-2005) | 0.5% |
| Jacqui Smith | Redditch | Lab | (2005-2010) | 0.5% |
| Jeff Smith | Manchester Withington | Lab | (2024-present) | 0.0% |
| Jeff Smith | Manchester, Withington | Lab | (2015-2017) | 1.4% |
| Jeff Smith | Manchester, Withington | Lab | (2017-2019) | 0.0% |
| Jeff Smith | Manchester, Withington | Lab | (2019-2024) | 0.5% |
| John Smith | Vale of Glamorgan | Lab | (1997-2001) | 0.3% |
| John Smith | Vale of Glamorgan | Lab | (2001-2005) | 0.4% |
| John Smith | Vale of Glamorgan | Lab | (2005-2010) | 1.8% |
| Julian Smith | Skipton and Ripon | Con | (2010-2015) | 1.1% |
| Julian Smith | Skipton and Ripon | Con | (2015-2017) | 0.0% |
| Julian Smith | Skipton and Ripon | Con | (2017-2019) | 0.0% |
| Julian Smith | Skipton and Ripon | Con | (2019-2024) | 0.3% |
| Julian Smith | Skipton and Ripon | Con | (2024-present) | 0.8% |
| Lord Smith of Kelvin | (Lords) | Crossbench | (2008-present) | 35.1% |
| Laura Smith | Crewe and Nantwich | Lab | (2017-2019) | 2.7% |
| Lord Smith of Leigh | (Lords) | Lab | (1999-2021) | 1.2% |
| Baroness Smith of Llanfaes | (Lords) | PC | (2024-present) | 0.0% |
| Mr Llew Smith | Blaenau Gwent | Lab | (1997-2001) | 3.5% |
| Mr Llew Smith | Blaenau Gwent | Lab | (2001-2005) | 8.0% |
| Baroness Smith of Malvern | (Lords) | Lab | (2024-present) | 0.0% |
| Baroness Smith of Newnham | (Lords) | LDem | (2014-present) | 1.3% |
| Nick Smith | Blaenau Gwent | Lab | (2010-2015) | 0.1% |
| Nick Smith | Blaenau Gwent | Lab | (2015-2017) | 0.3% |
| Nick Smith | Blaenau Gwent | Lab | (2017-2019) | 0.5% |
| Nick Smith | Blaenau Gwent | Lab | (2019-2024) | 0.1% |
| Nick Smith | Blaenau Gwent and Rhymney | Lab | (2024-present) | 0.6% |
| Owen Smith | Pontypridd | Lab | (2010-2015) | 0.0% |
| Owen Smith | Pontypridd | Lab | (2015-2017) | 1.4% |
| Owen Smith | Pontypridd | Lab | (2017-2019) | 1.1% |
| Rebecca Smith | South West Devon | Con | (2024-present) | 0.0% |
| Robert Smith | West Aberdeenshire and Kincardine | LDem | (1997-2001) | 2.9% |
| Robert Smith | West Aberdeenshire and Kincardine | LDem | (2001-2005) | 3.3% |
| Robert Smith | West Aberdeenshire and Kincardine | LDem | (2005-2010) | 0.6% |
| Robert Smith | West Aberdeenshire and Kincardine | LDem | (2010-2015) | 1.5% |
| Royston Smith | Southampton, Itchen | Con | (2015-2017) | 0.0% |
| Royston Smith | Southampton, Itchen | Con | (2017-2019) | 2.1% |
| Royston Smith | Southampton, Itchen | Con | (2019-2024) | 0.7% |
| Sarah Smith | Hyndburn | Lab | (2024-present) | 3.2% |
| Karin Smyth | Bristol South | Lab | (2015-2017) | 0.6% |
| Karin Smyth | Bristol South | Lab | (2017-2019) | 0.0% |
| Karin Smyth | Bristol South | Lab | (2019-2024) | 0.0% |
| Karin Smyth | Bristol South | Lab | (2024-present) | 0.0% |
| Martin Smyth | Belfast South | whilst Independent Ulster Unionist | (2003-2004) | n/a |
| Martin Smyth | Belfast South | UUP | (1997-2001) | 0.0% |
| Martin Smyth | Belfast South | whilst UUP | (2001-2003) | 0.9% |
| Martin Smyth | Belfast South | whilst UUP | (2004-2005) | 0.8% |
| Lord Snape | (Lords) | Lab | (2004-present) | 0.7% |
| Mr Peter Snape | West Bromwich East | Lab | (1997-2001) | 0.5% |
| Anne Snelgrove | South Swindon | Lab | (2005-2010) | 0.6% |
| Gareth Snell | Stoke-on-Trent Central | Lab | (2017-2017) | 0.0% |
| Gareth Snell | Stoke-on-Trent Central | Lab | (2017-2019) | 4.7% |
| Gareth Snell | Stoke-on-Trent Central | Lab | (2024-present) | 0.6% |
| Andrew Snowden | Fylde | Con | (2024-present) | 1.7% |
| The Earl of Snowdon | (Lords) | Crossbench | (1999-2016) | n/a |
| Lord Soames of Fletching | (Lords) | Con | (2022-present) | 0.0% |
| Nicholas Soames | Mid Sussex | Con | (1997-2001) | 0.5% |
| Nicholas Soames | Mid Sussex | Con | (2001-2005) | 0.3% |
| Nicholas Soames | Mid Sussex | Con | (2005-2010) | 1.9% |
| Nicholas Soames | Mid Sussex | Con | (2010-2015) | 0.6% |
| Nicholas Soames | Mid Sussex | Con | (2015-2017) | 0.3% |
| Nicholas Soames | Mid Sussex | whilst Con | (2017-2019) | 5.3% |
| Nicholas Soames | Mid Sussex | whilst Independent | (2019-2019) | n/a |
| Alex Sobel | Leeds Central and Headingley | Lab | (2024-present) | 0.0% |
| Alex Sobel | Leeds North West | Lab | (2017-2019) | 0.3% |
| Alex Sobel | Leeds North West | Lab | (2019-2024) | 0.0% |
| Lord Soley | (Lords) | Lab | (2005-2023) | 0.7% |
| Mr Clive Soley | Ealing, Acton and Shepherd's Bush | Lab | (1997-2001) | 0.3% |
| Mr Clive Soley | Ealing, Acton and Shepherd's Bush | Lab | (2001-2005) | 0.5% |
| Ian Sollom | St Neots and Mid Cambridgeshire | LDem | (2024-present) | 0.0% |
| Amanda Solloway | Derby North | Con | (2015-2017) | 0.0% |
| Amanda Solloway | Derby North | Con | (2019-2024) | 0.0% |
| The Duke of Somerset | (Lords) | Crossbench | (2014-present) | 17.1% |
| Anna Soubry | Broxtowe | Con | (2010-2015) | 1.2% |
| Anna Soubry | Broxtowe | Con | (2015-2017) | 0.7% |
| Anna Soubry | Broxtowe | whilst Con | (2017-2019) | 14.0% |
| Anna Soubry | Broxtowe | whilst Independent | (2019-2019) | n/a |
| Peter Soulsby | Leicester South | Lab | (2005-2010) | 3.1% |
| Peter Soulsby | Leicester South | Lab | (2010-2011) | 1.2% |
| Lord Soulsby of Swaffham Prior | (Lords) | Con | (1990-2015) | 2.0% |
| The Bishop of Southwark | (Lords) | Bishop | (1996-2010) | 4.3% |
| The Bishop of Southwark | (Lords) | Bishop | (2014-present) | 0.0% |
| The Bishop of Southwell and Nottingham | (Lords) | Bishop | (2005-2009) | 0.0% |
| The Bishop of Southwell and Nottingham | (Lords) | Bishop | (2004-2005) | 23.1% |
| The Bishop of Southwell and Nottingham | (Lords) | Bishop | (2022-present) | 0.0% |
| Helen Southworth | Warrington South | Lab | (1997-2001) | 0.2% |
| Helen Southworth | Warrington South | Lab | (2001-2005) | 0.6% |
| Helen Southworth | Warrington South | Lab | (2005-2010) | 0.3% |
| Lord Spellar | (Lords) | Lab | (2024-present) | 0.0% |
| John Spellar | Warley | Lab | (1997-2001) | 0.1% |
| John Spellar | Warley | Lab | (2001-2005) | 0.9% |
| John Spellar | Warley | Lab | (2005-2010) | 1.4% |
| John Spellar | Warley | Lab | (2010-2015) | 0.8% |
| John Spellar | Warley | Lab | (2015-2017) | 1.3% |
| John Spellar | Warley | Lab | (2017-2019) | 2.6% |
| John Spellar | Warley | Lab | (2019-2024) | 1.0% |
| Caroline Spelman | Meriden | Con | (1997-2001) | 0.1% |
| Caroline Spelman | Meriden | Con | (2001-2005) | 0.6% |
| Caroline Spelman | Meriden | Con | (2005-2010) | 1.1% |
| Caroline Spelman | Meriden | Con | (2010-2015) | 1.0% |
| Caroline Spelman | Meriden | Con | (2015-2017) | 0.3% |
| Caroline Spelman | Meriden | Con | (2017-2019) | 6.9% |
| Lord Spencer of Alresford | (Lords) | Con | (2020-present) | 0.0% |
| Ben Spencer | Runnymede and Weybridge | Con | (2019-2024) | 0.7% |
| Ben Spencer | Runnymede and Weybridge | Con | (2024-present) | 1.4% |
| Mark Spencer | Sherwood | Con | (2010-2015) | 1.0% |
| Mark Spencer | Sherwood | Con | (2015-2017) | 0.0% |
| Mark Spencer | Sherwood | Con | (2017-2019) | 0.2% |
| Mark Spencer | Sherwood | Con | (2019-2024) | 0.2% |
| Patrick Spencer | Central Suffolk and North Ipswich | Con | (2024-present) | 0.0% |
| Lord Spicer | (Lords) | Con | (2010-2019) | 0.0% |
| Michael Spicer | West Worcestershire | Con | (1997-2001) | 0.1% |
| Michael Spicer | West Worcestershire | Con | (2001-2005) | 0.7% |
| Michael Spicer | West Worcestershire | Con | (2005-2010) | 0.5% |
| Bob Spink | Castle Point | Con | (2001-2005) | 2.1% |
| Bob Spink | Castle Point | whilst Con | (2005-2008) | 1.9% |
| Bob Spink | Castle Point | whilst Independent | (2008-2010) | n/a |
| Bob Spink | Castle Point | whilst Independent Conservative | (2008-2008) | n/a |
| Bob Spink | Castle Point | whilst UKIP | (2008-2008) | 0.0% |
| Richard Spring | West Suffolk | Con | (1997-2001) | 0.5% |
| Richard Spring | West Suffolk | Con | (2001-2005) | 0.6% |
| Richard Spring | West Suffolk | Con | (2005-2010) | 0.4% |
| Rachel Squire | Dunfermline and West Fife | Lab | (2005-2006) | n/a |
| Rachel Squire | Dunfermline West | Lab | (1997-2001) | 0.3% |
| Rachel Squire | Dunfermline West | Lab | (2001-2005) | 1.6% |
| The Bishop of St Albans | (Lords) | Bishop | (1999-2009) | 0.0% |
| The Bishop of St Albans | (Lords) | Bishop | (2013-present) | 0.6% |
| Mr Nick St Aubyn | Guildford | Con | (1997-2001) | 0.6% |
| The Bishop of St Edmundsbury and Ipswich | (Lords) | Bishop | (2002-2007) | 0.0% |
| The Bishop of St Edmundsbury and Ipswich | (Lords) | Bishop | (2011-2013) | 0.0% |
| The Bishop of St Edmundsbury and Ipswich | (Lords) | Bishop | (2022-present) | 0.0% |
| Lord St John of Bletso | (Lords) | Crossbench | (1978-present) | 26.9% |
| Lord St John of Fawsley | (Lords) | Con | (1987-2012) | 4.3% |
| Alexander Stafford | Rother Valley | Con | (2019-2024) | 0.6% |
| Gregory Stafford | Farnham and Bordon | Con | (2024-present) | 0.0% |
| Euan Stainbank | Falkirk | Lab | (2024-present) | 0.0% |
| The Earl of Stair | (Lords) | Crossbench | (2008-present) | 23.6% |
| Lord Stallard | (Lords) | Lab | (1983-2008) | 8.9% |
| John Stanley | Tonbridge and Malling | Con | (1997-2001) | 0.6% |
| John Stanley | Tonbridge and Malling | Con | (2001-2005) | 0.9% |
| John Stanley | Tonbridge and Malling | Con | (2005-2010) | 2.3% |
| John Stanley | Tonbridge and Malling | Con | (2010-2015) | 0.7% |
| Viscount Stansgate | (Lords) | Lab | (2021-present) | 0.4% |
| Phyllis Starkey | Milton Keynes South West | Lab | (1997-2001) | 0.5% |
| Phyllis Starkey | Milton Keynes South West | Lab | (2001-2005) | 0.4% |
| Phyllis Starkey | Milton Keynes South West | Lab | (2005-2010) | 0.4% |
| Keir Starmer | Holborn and St Pancras | Lab | (2015-2017) | 0.7% |
| Keir Starmer | Holborn and St Pancras | Lab | (2017-2019) | 0.3% |
| Keir Starmer | Holborn and St Pancras | Lab | (2019-2024) | 0.0% |
| Keir Starmer | Holborn and St Pancras | Lab | (2024-present) | 0.0% |
| Baroness Stedman-Scott | (Lords) | Con | (2010-present) | 0.2% |
| Lord Steel of Aikwood | (Lords) | LDem | (1997-2019) | 3.7% |
| Lord Steel of Aikwood | (Lords) | LDem | (2019-2020) | 0.0% |
| Lord Steel of Aikwood | (Lords) | Non-affiliated | (2019-2019) | 0.0% |
| Lord Steel of Aikwood | (Lords) | Non-affiliated | (2020-2020) | n/a |
| Anthony Steen | Totnes | Con | (1997-2001) | 0.3% |
| Anthony Steen | Totnes | Con | (2001-2005) | 1.8% |
| Anthony Steen | Totnes | Con | (2005-2010) | 3.2% |
| Stefan Tymkewycz | Lothians | SNP | (2007-2007) | 0.0% |
| Lord Steinberg | (Lords) | Con | (2004-2009) | 1.0% |
| Mr Gerry Steinberg | City of Durham | Lab | (1997-2001) | 0.7% |
| Mr Gerry Steinberg | City of Durham | Lab | (2001-2005) | 3.1% |
| Stephanie Callaghan | Uddingston and Bellshill | SNP | (2021-present) | n/a |
| Lord Stephen | (Lords) | LDem | (2011-present) | 0.4% |
| Stephen Kerr | Central Scotland | Con | (2021-present) | n/a |
| Chris Stephens | Glasgow South West | SNP | (2015-2017) | 0.3% |
| Chris Stephens | Glasgow South West | SNP | (2017-2019) | 0.0% |
| Chris Stephens | Glasgow South West | SNP | (2019-2024) | 0.0% |
| Andrew Stephenson | Pendle | Con | (2010-2015) | 1.2% |
| Andrew Stephenson | Pendle | Con | (2015-2017) | 0.0% |
| Andrew Stephenson | Pendle | Con | (2017-2019) | 0.9% |
| Andrew Stephenson | Pendle | Con | (2019-2024) | 0.1% |
| Blake Stephenson | Mid Bedfordshire | Con | (2024-present) | 0.7% |
| Lord Sterling of Plaistow | (Lords) | Con | (1991-present) | 1.0% |
| Baroness Stern | (Lords) | Crossbench | (1999-present) | 19.9% |
| Lord Stern of Brentford | (Lords) | Crossbench | (2007-present) | 15.2% |
| Lord Stevens of Birmingham | (Lords) | Crossbench | (2021-present) | 12.1% |
| Jo Stevens | Cardiff Central | Lab | (2015-2017) | 1.5% |
| Jo Stevens | Cardiff Central | Lab | (2017-2019) | 0.8% |
| Jo Stevens | Cardiff Central | Lab | (2019-2024) | 0.0% |
| Jo Stevens | Cardiff East | Lab | (2024-present) | 0.0% |
| Lord Stevens of Kirkwhelpington | (Lords) | Crossbench | (2005-present) | 36.0% |
| Lord Stevens of Ludgate | (Lords) | Con | (1987-2004) | 2.9% |
| Lord Stevens of Ludgate | (Lords) | Conservative Independent | (2004-2012) | n/a |
| Lord Stevens of Ludgate | (Lords) | Conservative Independent | (2018-present) | 0.0% |
| Lord Stevens of Ludgate | (Lords) | Crossbench | (2004-2004) | n/a |
| Lord Stevens of Ludgate | (Lords) | Non-affiliated | (2004-2004) | n/a |
| Lord Stevens of Ludgate | (Lords) | UKIP | (2012-2018) | 0.0% |
| Lord Stevenson of Balmacara | (Lords) | Lab | (2010-present) | 0.3% |
| Lord Stevenson of Coddenham | (Lords) | Crossbench | (1999-2023) | 5.6% |
| Mr George Stevenson | Stoke-on-Trent South | Lab | (1997-2001) | 1.2% |
| Mr George Stevenson | Stoke-on-Trent South | Lab | (2001-2005) | 2.6% |
| Jane Stevenson | Wolverhampton North East | Con | (2019-2024) | 0.9% |
| John Stevenson | Carlisle | Con | (2010-2015) | 2.3% |
| John Stevenson | Carlisle | Con | (2015-2017) | 0.0% |
| John Stevenson | Carlisle | Con | (2017-2019) | 3.3% |
| John Stevenson | Carlisle | Con | (2019-2024) | 1.2% |
| Kenneth Stevenson | Airdrie and Shotts | Lab | (2024-present) | 1.8% |
| Stewart Stevenson | Banff and Buchan | SNP | (2003-2007) | 0.6% |
| Stewart Stevenson | Banff and Buchan | SNP | (2001-2003) | 2.9% |
| Stewart Stevenson | Banff and Buchan | SNP | (2007-2011) | 0.0% |
| Stewart Stevenson | Banffshire and Buchan Coast | SNP | (2011-2016) | n/a |
| Stewart Stevenson | Banffshire and Buchan Coast | SNP | (2016-2021) | n/a |
| Stewart Maxwell | West of Scotland | SNP | (2003-2007) | 0.7% |
| Stewart Maxwell | West of Scotland | SNP | (2007-2011) | 0.0% |
| Stewart Maxwell | West Scotland | SNP | (2011-2016) | n/a |
| Bob Stewart | Beckenham | Con | (2010-2015) | 3.3% |
| Bob Stewart | Beckenham | Con | (2015-2017) | 0.3% |
| Bob Stewart | Beckenham | Con | (2017-2019) | 3.0% |
| Bob Stewart | Beckenham | Con | (2019-2024) | 0.1% |
| Lord Stewartby | (Lords) | Con | (1992-2015) | 1.4% |
| Mr David Stewart | Inverness East, Nairn and Lochaber | Lab | (1997-2001) | 0.2% |
| Mr David Stewart | Inverness East, Nairn and Lochaber | Lab | (2001-2005) | 1.3% |
| Lord Stewart of Dirleton | (Lords) | Con | (2020-present) | 0.0% |
| Elaine Stewart | Ayr, Carrick and Cumnock | Lab | (2024-present) | 0.0% |
| Iain Stewart | Milton Keynes South | Con | (2010-2015) | 2.0% |
| Iain Stewart | Milton Keynes South | Con | (2015-2017) | 0.0% |
| Iain Stewart | Milton Keynes South | Con | (2017-2019) | 0.2% |
| Iain Stewart | Milton Keynes South | Con | (2019-2024) | 0.2% |
| Ian Stewart | Eccles | Lab | (1997-2001) | 0.7% |
| Ian Stewart | Eccles | Lab | (2001-2005) | 1.1% |
| Ian Stewart | Eccles | Lab | (2005-2010) | 1.6% |
| Rory Stewart | Penrith and The Border | Con | (2010-2015) | 1.0% |
| Rory Stewart | Penrith and The Border | Con | (2015-2017) | 0.0% |
| Rory Stewart | Penrith and The Border | whilst Con | (2017-2019) | 1.8% |
| Rory Stewart | Penrith and The Border | whilst Independent | (2019-2019) | n/a |
| Lord Steyn | (Lords) | Crossbench | (1995-2017) | 20.0% |
| Mr Paul Stinchcombe | Wellingborough | Lab | (1997-2001) | 1.9% |
| Mr Paul Stinchcombe | Wellingborough | Lab | (2001-2005) | 1.4% |
| Lord Stirrup | (Lords) | Crossbench | (2011-present) | 48.7% |
| Howard Stoate | Dartford | Lab | (1997-2001) | 0.0% |
| Howard Stoate | Dartford | Lab | (2001-2005) | 0.6% |
| Howard Stoate | Dartford | Lab | (2005-2010) | 0.5% |
| Lord Stodart of Leaston | (Lords) | Con | (1981-2003) | 0.8% |
| Lord Stoddart of Swindon | (Lords) | Independent Labour | (1983-2020) | n/a |
| Lord Stokes | (Lords) | Crossbench | (1969-2008) | 0.0% |
| Lord Stone of Blackheath | (Lords) | Lab | (1997-2019) | 0.8% |
| Lord Stone of Blackheath | (Lords) | Non-affiliated | (2019-present) | 8.6% |
| Lord Stoneham of Droxford | (Lords) | LDem | (2011-present) | 0.8% |
| Jamie Stone | Caithness, Sutherland and Easter Ross | LDem | (2017-2019) | 0.0% |
| Jamie Stone | Caithness, Sutherland and Easter Ross | LDem | (2019-2024) | 0.0% |
| Jamie Stone | Caithness, Sutherland and Easter Ross | LDem | (2024-present) | 2.6% |
| Will Stone | Swindon North | Lab | (2024-present) | 0.0% |
| Lord Storey | (Lords) | LDem | (2011-present) | 0.9% |
| Mr Roger Stott | Wigan | Lab | (1997-1999) | 0.9% |
| Baroness Stowell of Beeston | (Lords) | Con | (2011-2018) | 0.8% |
| Baroness Stowell of Beeston | (Lords) | Non-affiliated | (2018-present) | 69.5% |
| Lord Strabolgi | (Lords) | Lab | (1953-2010) | 1.9% |
| Baroness Strange | (Lords) | Crossbench | (1986-2005) | 18.4% |
| Gavin Strang | Edinburgh East | Lab | (2005-2010) | 2.6% |
| Gavin Strang | Edinburgh East and Musselburgh | Lab | (1997-2001) | 0.9% |
| Gavin Strang | Edinburgh East and Musselburgh | Lab | (2001-2005) | 2.1% |
| Lord Strasburger | (Lords) | LDem | (2011-2015) | 7.6% |
| Lord Strasburger | (Lords) | LDem | (2015-present) | 0.5% |
| Lord Strasburger | (Lords) | Non-affiliated | (2015-2015) | n/a |
| Lord Stratford | (Lords) | Lab | (2005-2006) | 0.0% |
| Lord Strathcarron | (Lords) | Con | (2022-present) | 0.0% |
| Lord Strathclyde | (Lords) | Con | (1985-present) | 1.1% |
| Alistair Strathern | Hitchin | Lab | (2024-present) | 0.0% |
| Alistair Strathern | Mid Bedfordshire | Lab | (2023-2024) | 0.0% |
| Jack Straw | Blackburn | Lab | (1997-2001) | 0.8% |
| Jack Straw | Blackburn | Lab | (2001-2005) | 3.3% |
| Jack Straw | Blackburn | Lab | (2005-2010) | 0.9% |
| Jack Straw | Blackburn | Lab | (2010-2015) | 1.3% |
| Gary Streeter | South West Devon | Con | (1997-2001) | 0.3% |
| Gary Streeter | South West Devon | Con | (2001-2005) | 0.5% |
| Gary Streeter | South West Devon | Con | (2005-2010) | 1.1% |
| Gary Streeter | South West Devon | Con | (2010-2015) | 1.0% |
| Gary Streeter | South West Devon | Con | (2015-2017) | 0.0% |
| Gary Streeter | South West Devon | Con | (2017-2019) | 2.4% |
| Gary Streeter | South West Devon | Con | (2019-2024) | 0.2% |
| Wes Streeting | Ilford North | Lab | (2015-2017) | 0.6% |
| Wes Streeting | Ilford North | Lab | (2017-2019) | 0.5% |
| Wes Streeting | Ilford North | Lab | (2019-2024) | 0.0% |
| Wes Streeting | Ilford North | Lab | (2024-present) | 4.7% |
| Alan Strickland | Newton Aycliffe and Spennymoor | Lab | (2024-present) | 0.6% |
| Mel Stride | Central Devon | Con | (2010-2015) | 1.4% |
| Mel Stride | Central Devon | Con | (2015-2017) | 0.2% |
| Mel Stride | Central Devon | Con | (2017-2019) | 0.7% |
| Mel Stride | Central Devon | Con | (2019-2024) | 0.1% |
| Mel Stride | Central Devon | Con | (2024-present) | 1.8% |
| Graham Stringer | Blackley and Broughton | Lab | (2010-2015) | 2.0% |
| Graham Stringer | Blackley and Broughton | Lab | (2015-2017) | 7.7% |
| Graham Stringer | Blackley and Broughton | Lab | (2017-2019) | 28.2% |
| Graham Stringer | Blackley and Broughton | Lab | (2019-2024) | 0.5% |
| Graham Stringer | Blackley and Middleton South | Lab | (2024-present) | 3.2% |
| Graham Stringer | Manchester, Blackley | Lab | (1997-2001) | 0.6% |
| Graham Stringer | Manchester, Blackley | Lab | (2001-2005) | 1.4% |
| Graham Stringer | Manchester, Blackley | Lab | (2005-2010) | 1.6% |
| Baroness Stroud | (Lords) | Con | (2015-present) | 2.8% |
| Stuart McMillan | Greenock and Inverclyde | SNP | (2016-2021) | n/a |
| Stuart McMillan | Greenock and Inverclyde | SNP | (2021-present) | n/a |
| Stuart McMillan | West of Scotland | SNP | (2007-2011) | 0.3% |
| Stuart McMillan | West Scotland | SNP | (2011-2016) | n/a |
| Baroness Stuart of Edgbaston | (Lords) | Non-affiliated | (2020-present) | 48.1% |
| Gisela Stuart | Birmingham, Edgbaston | Lab | (1997-2001) | 0.3% |
| Gisela Stuart | Birmingham, Edgbaston | Lab | (2001-2005) | 1.5% |
| Gisela Stuart | Birmingham, Edgbaston | Lab | (2005-2010) | 2.6% |
| Gisela Stuart | Birmingham, Edgbaston | Lab | (2010-2015) | 1.5% |
| Gisela Stuart | Birmingham, Edgbaston | Lab | (2015-2017) | 6.5% |
| Graham Stuart | Beverley and Holderness | Con | (2005-2010) | 1.8% |
| Graham Stuart | Beverley and Holderness | Con | (2010-2015) | 1.7% |
| Graham Stuart | Beverley and Holderness | Con | (2015-2017) | 0.3% |
| Graham Stuart | Beverley and Holderness | Con | (2017-2019) | 0.0% |
| Graham Stuart | Beverley and Holderness | Con | (2019-2024) | 0.2% |
| Graham Stuart | Beverley and Holderness | Con | (2024-present) | 0.7% |
| Lord Stunell | (Lords) | LDem | (2015-2024) | 0.1% |
| Andrew Stunell | Hazel Grove | LDem | (1997-2001) | 2.0% |
| Andrew Stunell | Hazel Grove | LDem | (2001-2005) | 1.6% |
| Andrew Stunell | Hazel Grove | LDem | (2005-2010) | 1.1% |
| Andrew Stunell | Hazel Grove | LDem | (2010-2015) | 0.5% |
| Julian Sturdy | York Outer | Con | (2010-2015) | 1.3% |
| Julian Sturdy | York Outer | Con | (2015-2017) | 0.0% |
| Julian Sturdy | York Outer | Con | (2017-2019) | 1.7% |
| Julian Sturdy | York Outer | Con | (2019-2024) | 2.2% |
| Sue Webber | Lothian | Con | (2021-present) | n/a |
| Lord Sugar | (Lords) | Crossbench | (2017-present) | 100.0% |
| Lord Sugar | (Lords) | Lab | (2009-2015) | 0.0% |
| Lord Sugar | (Lords) | Non-affiliated | (2015-2017) | 100.0% |
| Baroness Sugg | (Lords) | Con | (2016-present) | 0.6% |
| Kirsteen Sullivan | Bathgate and Linlithgow | Lab | (2024-present) | 2.9% |
| Lauren Sullivan | Gravesham | Lab | (2024-present) | 1.8% |
| Zarah Sultana | Coventry South | whilst Independent | (2024-present) | n/a |
| Zarah Sultana | Coventry South | Lab | (2019-2024) | 0.4% |
| Zarah Sultana | Coventry South | whilst Lab | (2024-2024) | 25.0% |
| Rishi Sunak | Richmond (Yorks) | Con | (2015-2017) | 0.0% |
| Rishi Sunak | Richmond (Yorks) | Con | (2017-2019) | 0.0% |
| Rishi Sunak | Richmond (Yorks) | Con | (2019-2024) | 0.3% |
| Rishi Sunak | Richmond and Northallerton | Con | (2024-present) | 40.0% |
| James Sunderland | Bracknell | Con | (2019-2024) | 0.0% |
| Lord Suri | (Lords) | Con | (2014-present) | 0.9% |
| Susan Deacon | Edinburgh East and Musselburgh | Lab | (2003-2007) | 1.6% |
| Susan Deacon | Edinburgh East and Musselburgh | Lab | (1999-2003) | 0.8% |
| Gerry Sutcliffe | Bradford South | Lab | (1997-2001) | 0.3% |
| Gerry Sutcliffe | Bradford South | Lab | (2001-2005) | 0.9% |
| Gerry Sutcliffe | Bradford South | Lab | (2005-2010) | 0.3% |
| Gerry Sutcliffe | Bradford South | Lab | (2010-2015) | 0.5% |
| Lord Sutherland of Houndwood | (Lords) | Crossbench | (2001-2018) | 31.1% |
| Baroness Suttie | (Lords) | LDem | (2013-present) | 0.2% |
| Ian Swales | Redcar | LDem | (2010-2015) | 2.3% |
| Peter Swallow | Bracknell | Lab | (2024-present) | 0.0% |
| Robin Swann | South Antrim | UUP | (2024-present) | 0.0% |
| Desmond Swayne | New Forest West | Con | (1997-2001) | 1.3% |
| Desmond Swayne | New Forest West | Con | (2001-2005) | 1.6% |
| Desmond Swayne | New Forest West | Con | (2005-2010) | 1.4% |
| Desmond Swayne | New Forest West | Con | (2010-2015) | 0.9% |
| Desmond Swayne | New Forest West | Con | (2015-2017) | 0.0% |
| Desmond Swayne | New Forest West | Con | (2017-2019) | 2.9% |
| Desmond Swayne | New Forest West | Con | (2019-2024) | 4.1% |
| Desmond Swayne | New Forest West | Con | (2024-present) | 0.0% |
| Paul Sweeney | Glasgow North East | Lab | (2017-2019) | 0.8% |
| Baroness Swinburne | (Lords) | Con | (2023-present) | 0.0% |
| Lord Swinfen | (Lords) | Con | (1977-2022) | 3.2% |
| John Swinney | North Tayside | SNP | (1997-2001) | 0.4% |
| Jo Swinson | East Dunbartonshire | LDem | (2005-2010) | 0.8% |
| Jo Swinson | East Dunbartonshire | LDem | (2010-2015) | 0.1% |
| Jo Swinson | East Dunbartonshire | LDem | (2017-2019) | 0.0% |
| Lord Swire | (Lords) | Con | (2022-present) | 0.0% |
| Hugo Swire | East Devon | Con | (2001-2005) | 1.2% |
| Hugo Swire | East Devon | Con | (2005-2010) | 2.1% |
| Hugo Swire | East Devon | Con | (2010-2015) | 0.4% |
| Hugo Swire | East Devon | Con | (2015-2017) | 0.0% |
| Hugo Swire | East Devon | Con | (2017-2019) | 1.7% |
| Sylvia Jackson | Stirling | Lab | (2003-2007) | 0.1% |
| Sylvia Jackson | Stirling | Lab | (1999-2003) | 0.5% |
| Baroness Symons of Vernham Dean | (Lords) | Lab | (1996-present) | 0.6% |
| Robert Syms | Poole | Con | (1997-2001) | 0.1% |
| Robert Syms | Poole | Con | (2001-2005) | 1.5% |
| Robert Syms | Poole | Con | (2005-2010) | 0.8% |
| Robert Syms | Poole | Con | (2010-2015) | 1.8% |
| Robert Syms | Poole | Con | (2015-2017) | 0.0% |
| Robert Syms | Poole | Con | (2017-2019) | 2.5% |
| Robert Syms | Poole | Con | (2019-2024) | 1.8% |
| Mark Tami | Alyn and Deeside | Lab | (2005-2010) | 0.2% |
| Mark Tami | Alyn and Deeside | Lab | (2010-2015) | 0.4% |
| Mark Tami | Alyn and Deeside | Lab | (2001-2005) | 0.9% |
| Mark Tami | Alyn and Deeside | Lab | (2015-2017) | 0.0% |
| Mark Tami | Alyn and Deeside | Lab | (2017-2019) | 0.3% |
| Mark Tami | Alyn and Deeside | Lab | (2019-2024) | 1.7% |
| Mark Tami | Alyn and Deeside | Lab | (2024-present) | 0.0% |
| Lord Tanlaw | (Lords) | Con | (2015-2017) | 2.4% |
| Lord Tanlaw | (Lords) | Crossbench | (1971-2015) | 18.9% |
| Mike Tapp | Dover and Deal | Lab | (2024-present) | 0.5% |
| Peter Tapsell | Louth and Horncastle | Con | (1997-2001) | 0.5% |
| Peter Tapsell | Louth and Horncastle | Con | (2001-2005) | 0.7% |
| Peter Tapsell | Louth and Horncastle | Con | (2005-2010) | 1.4% |
| Peter Tapsell | Louth and Horncastle | Con | (2010-2015) | 5.2% |
| Lord Tarassenko | (Lords) | Crossbench | (2024-present) | 43.8% |
| Sam Tarry | Ilford South | Lab | (2019-2024) | 0.0% |
| Lord Taverne | (Lords) | LDem | (1996-present) | 3.1% |
| Tavish Scott | Shetland Islands | LDem | (2003-2007) | 0.2% |
| Tavish Scott | Shetland Islands | LDem | (1999-2003) | 2.4% |
| Tavish Scott | Shetland Islands | LDem | (2007-2011) | 0.0% |
| Tavish Scott | Shetland Islands | LDem | (2011-2016) | n/a |
| Tavish Scott | Shetland Islands | LDem | (2016-2019) | n/a |
| Alison Taylor | Paisley and Renfrewshire North | Lab | (2024-present) | 3.5% |
| Mrs Ann Taylor | Dewsbury | Lab | (1997-2001) | 0.3% |
| Mrs Ann Taylor | Dewsbury | Lab | (2001-2005) | 0.5% |
| Lord Taylor of Blackburn | (Lords) | Lab | (1978-2016) | 0.8% |
| Baroness Taylor of Bolton | (Lords) | Lab | (2005-present) | 0.3% |
| Dari Taylor | Stockton South | Lab | (1997-2001) | 0.5% |
| Dari Taylor | Stockton South | Lab | (2001-2005) | 0.4% |
| Dari Taylor | Stockton South | Lab | (2005-2010) | 0.9% |
| David Taylor | Hemel Hempstead | Lab | (2024-present) | 0.0% |
| David Taylor | North West Leicestershire | Lab | (1997-2001) | 1.4% |
| David Taylor | North West Leicestershire | Lab | (2001-2005) | 6.5% |
| David Taylor | North West Leicestershire | Lab | (2005-2009) | 11.6% |
| Lord Taylor of Goss Moor | (Lords) | LDem | (2010-present) | 2.2% |
| Lord Taylor of Gryfe | (Lords) | Lab | (1968-2001) | 0.0% |
| Lord Taylor of Holbeach | (Lords) | Con | (2006-present) | 0.6% |
| Ian Taylor | Esher and Walton | Con | (1997-2001) | 0.9% |
| Ian Taylor | Esher and Walton | Con | (2001-2005) | 1.5% |
| Ian Taylor | Esher and Walton | Con | (2005-2010) | 2.5% |
| Mr John Taylor | Solihull | Con | (1997-2001) | 0.6% |
| Mr John Taylor | Solihull | Con | (2001-2005) | 2.9% |
| John Taylor | Strangford | UUP | (1997-2001) | 3.6% |
| Luke Taylor | Sutton and Cheam | LDem | (2024-present) | 0.0% |
| Matthew Taylor | Truro and St Austell | LDem | (1997-2001) | 0.9% |
| Matthew Taylor | Truro and St Austell | LDem | (2001-2005) | 1.7% |
| Matthew Taylor | Truro and St Austell | LDem | (2005-2010) | 1.5% |
| Rachel Taylor | North Warwickshire and Bedworth | Lab | (2024-present) | 0.6% |
| Richard Taylor | Wyre Forest | Independent | (2001-2005) | n/a |
| Richard Taylor | Wyre Forest | Independent | (2005-2010) | n/a |
| Baroness Taylor of Stevenage | (Lords) | Lab | (2022-present) | 0.0% |
| Mr Teddy Taylor | Rochford and Southend East | Con | (1997-2001) | 4.0% |
| Mr Teddy Taylor | Rochford and Southend East | Con | (2001-2005) | 2.8% |
| Lord Taylor of Warwick | (Lords) | Con | (1996-2010) | 0.0% |
| Lord Taylor of Warwick | (Lords) | Non-affiliated | (2010-present) | 50.8% |
| Sarah Teather | Brent Central | LDem | (2010-2015) | 4.6% |
| Sarah Teather | Brent East | LDem | (2003-2005) | 2.0% |
| Sarah Teather | Brent East | LDem | (2005-2010) | 1.6% |
| Lord Tebbit | (Lords) | Con | (1992-2022) | 1.6% |
| Ted Brocklebank | Mid Scotland and Fife | Con | (2003-2007) | 1.0% |
| Ted Brocklebank | Mid Scotland and Fife | Con | (2007-2011) | 0.5% |
| Lord Temple-Morris | (Lords) | Lab | (2001-2018) | 1.3% |
| Mr Peter Temple-Morris | Leominster | whilst Con | (1997-1997) | 0.0% |
| Mr Peter Temple-Morris | Leominster | whilst Independent Conservative | (1997-1998) | n/a |
| Mr Peter Temple-Morris | Leominster | whilst Lab | (1998-2001) | 1.6% |
| Lord Templeman | (Lords) | Crossbench | (1982-2014) | 0.0% |
| Viscount Tenby | (Lords) | Crossbench | (1983-2015) | 19.0% |
| Tess White | North East Scotland | Con | (2021-present) | n/a |
| Lord Teverson | (Lords) | LDem | (2006-present) | 0.9% |
| Baroness Thatcher | (Lords) | Con | (1992-2013) | 0.0% |
| Alison Thewliss | Glasgow Central | SNP | (2015-2017) | 0.0% |
| Alison Thewliss | Glasgow Central | SNP | (2017-2019) | 0.0% |
| Alison Thewliss | Glasgow Central | SNP | (2019-2024) | 0.0% |
| Nick Thomas-Symonds | Torfaen | Lab | (2015-2017) | 0.3% |
| Nick Thomas-Symonds | Torfaen | Lab | (2017-2019) | 0.0% |
| Nick Thomas-Symonds | Torfaen | Lab | (2019-2024) | 0.0% |
| Nick Thomas-Symonds | Torfaen | Lab | (2024-present) | 3.6% |
| Bradley Thomas | Bromsgrove | Con | (2024-present) | 0.0% |
| Cameron Thomas | Tewkesbury | LDem | (2024-present) | 0.0% |
| Lord Thomas of Cwmgiedd | (Lords) | Judge | (2013-present) | 6.7% |
| Derek Thomas | St Ives | Con | (2015-2017) | 0.2% |
| Derek Thomas | St Ives | Con | (2017-2019) | 1.9% |
| Derek Thomas | St Ives | Con | (2019-2024) | 1.7% |
| Fred Thomas | Plymouth Moor View | Lab | (2024-present) | 0.7% |
| Mr Gareth Thomas | Clwyd West | Lab | (1997-2001) | 0.0% |
| Mr Gareth Thomas | Clwyd West | Lab | (2001-2005) | 0.8% |
| Gareth Thomas | Harrow West | Lab | (1997-2001) | 0.1% |
| Gareth Thomas | Harrow West | Lab | (2001-2005) | 1.1% |
| Gareth Thomas | Harrow West | Lab | (2005-2010) | 0.4% |
| Gareth Thomas | Harrow West | Lab | (2010-2015) | 0.2% |
| Gareth Thomas | Harrow West | Lab | (2015-2017) | 1.1% |
| Gareth Thomas | Harrow West | Lab | (2017-2019) | 0.0% |
| Gareth Thomas | Harrow West | Lab | (2019-2024) | 0.0% |
| Gareth Thomas | Harrow West | Lab | (2024-present) | 0.0% |
| Lord Thomas of Gresford | (Lords) | LDem | (1996-present) | 1.6% |
| Lord Thomas of Gwydir | (Lords) | Con | (1987-2008) | 0.0% |
| Lord Thomas of Macclesfield | (Lords) | Lab | (1997-2016) | 1.1% |
| Mr Simon Thomas | Ceredigion | PC | (2000-2001) | 1.0% |
| Mr Simon Thomas | Ceredigion | PC | (2001-2005) | 0.7% |
| Lord Thomas of Swynnerton | (Lords) | Crossbench | (1981-2017) | 32.9% |
| Baroness Thomas of Walliswood | (Lords) | LDem | (1994-2016) | 1.5% |
| Baroness Thomas of Winchester | (Lords) | LDem | (2006-present) | 1.0% |
| Adam Thompson | Erewash | Lab | (2024-present) | 0.5% |
| Owen Thompson | Midlothian | SNP | (2015-2017) | 0.3% |
| Owen Thompson | Midlothian | SNP | (2019-2024) | 0.0% |
| Mr William Thompson | West Tyrone | UUP | (1997-2001) | 1.5% |
| Michelle Thomson | Edinburgh West | whilst Independent | (2015-2017) | n/a |
| Michelle Thomson | Edinburgh West | whilst SNP | (2015-2015) | 0.0% |
| Lord Thomson of Monifieth | (Lords) | LDem | (1977-2008) | 1.2% |
| Richard Thomson | Gordon | SNP | (2019-2024) | 0.1% |
| Ross Thomson | Aberdeen South | Con | (2017-2019) | 3.0% |
| Emily Thornberry | Islington South and Finsbury | Lab | (2005-2010) | 1.6% |
| Emily Thornberry | Islington South and Finsbury | Lab | (2010-2015) | 0.5% |
| Emily Thornberry | Islington South and Finsbury | Lab | (2015-2017) | 0.0% |
| Emily Thornberry | Islington South and Finsbury | Lab | (2017-2019) | 0.3% |
| Emily Thornberry | Islington South and Finsbury | Lab | (2019-2024) | 0.0% |
| Emily Thornberry | Islington South and Finsbury | Lab | (2024-present) | 0.0% |
| Baroness Thornhill | (Lords) | LDem | (2015-present) | 0.2% |
| Baroness Thornton | (Lords) | Lab | (1998-present) | 0.3% |
| Mike Thornton | Eastleigh | LDem | (2013-2015) | 1.8% |
| Maggie Throup | Erewash | Con | (2015-2017) | 0.0% |
| Maggie Throup | Erewash | Con | (2017-2019) | 0.5% |
| Maggie Throup | Erewash | Con | (2019-2024) | 0.0% |
| Lord Thurlow | (Lords) | Crossbench | (2015-present) | 41.4% |
| Viscount Thurso | (Lords) | LDem | (2016-present) | 0.5% |
| John Thurso | Caithness, Sutherland and Easter Ross | LDem | (2001-2005) | 2.0% |
| John Thurso | Caithness, Sutherland and Easter Ross | LDem | (2005-2010) | 1.7% |
| John Thurso | Caithness, Sutherland and Easter Ross | LDem | (2010-2015) | 1.2% |
| Richard Tice | Boston and Skegness | Reform UK | (2024-present) | 2.3% |
| Marie Tidball | Penistone and Stocksbridge | Lab | (2024-present) | 0.0% |
| Tim Eagle | Highlands and Islands | Con | (2024-present) | n/a |
| Stephen Timms | East Ham | Lab | (1997-2001) | 0.4% |
| Stephen Timms | East Ham | Lab | (2001-2005) | 0.4% |
| Stephen Timms | East Ham | Lab | (2005-2010) | 1.0% |
| Stephen Timms | East Ham | Lab | (2010-2015) | 0.3% |
| Stephen Timms | East Ham | Lab | (2015-2017) | 1.2% |
| Stephen Timms | East Ham | Lab | (2017-2019) | 0.3% |
| Stephen Timms | East Ham | Lab | (2019-2024) | 0.0% |
| Stephen Timms | East Ham | Lab | (2024-present) | 1.9% |
| Nick Timothy | West Suffolk | Con | (2024-present) | 0.6% |
| Lord Timpson | (Lords) | Lab | (2024-present) | 0.0% |
| Edward Timpson | Crewe and Nantwich | Con | (2008-2010) | 1.0% |
| Edward Timpson | Crewe and Nantwich | Con | (2010-2015) | 0.3% |
| Edward Timpson | Crewe and Nantwich | Con | (2015-2017) | 0.0% |
| Edward Timpson | Eddisbury | Con | (2019-2024) | 0.1% |
| Paddy Tipping | Sherwood | Lab | (1997-2001) | 0.9% |
| Paddy Tipping | Sherwood | Lab | (2001-2005) | 1.3% |
| Paddy Tipping | Sherwood | Lab | (2005-2010) | 1.4% |
| Jessica Toale | Bournemouth West | Lab | (2024-present) | 0.5% |
| Mark Todd | South Derbyshire | Lab | (1997-2001) | 0.5% |
| Mark Todd | South Derbyshire | Lab | (2001-2005) | 0.8% |
| Mark Todd | South Derbyshire | Lab | (2005-2010) | 1.9% |
| Kelly Tolhurst | Rochester and Strood | Con | (2015-2017) | 0.0% |
| Kelly Tolhurst | Rochester and Strood | Con | (2017-2019) | 0.5% |
| Kelly Tolhurst | Rochester and Strood | Con | (2019-2024) | 0.3% |
| Tom McCabe | Hamilton South | Lab | (2003-2007) | 0.4% |
| Tom McCabe | Hamilton South | Lab | (1999-2003) | 0.7% |
| Tom McCabe | Hamilton South | Lab | (2007-2011) | 0.6% |
| Tom Mason | North East Scotland | Con | (2017-2021) | n/a |
| Tom Arthur | Renfrewshire South | SNP | (2016-2021) | n/a |
| Tom Arthur | Renfrewshire South | SNP | (2021-present) | n/a |
| Lord Tombs | (Lords) | Crossbench | (1990-2015) | 14.0% |
| Lord Tomlinson | (Lords) | Lab | (1998-2024) | 0.7% |
| Dan Tomlinson | Chipping Barnet | Lab | (2024-present) | 0.8% |
| Justin Tomlinson | North Swindon | Con | (2010-2015) | 2.3% |
| Justin Tomlinson | North Swindon | Con | (2015-2017) | 0.0% |
| Justin Tomlinson | North Swindon | Con | (2017-2019) | 1.4% |
| Justin Tomlinson | North Swindon | Con | (2019-2024) | 0.5% |
| Michael Tomlinson | Mid Dorset and North Poole | Con | (2015-2017) | 0.5% |
| Michael Tomlinson | Mid Dorset and North Poole | Con | (2017-2019) | 3.1% |
| Michael Tomlinson | Mid Dorset and North Poole | Con | (2019-2024) | 0.3% |
| Tommy Sheridan | Glasgow | whilst SG | (2006-2007) | 0.0% |
| Tommy Sheridan | Glasgow | whilst SSP | (2003-2006) | 4.1% |
| Tommy Sheridan | Glasgow | SSP | (1999-2003) | 0.0% |
| Baroness Tonge | (Lords) | Independent Liberal Democrat | (2012-2016) | n/a |
| Baroness Tonge | (Lords) | LDem | (2005-2012) | 8.9% |
| Baroness Tonge | (Lords) | Non-affiliated | (2016-2021) | 10.7% |
| Dr Jenny Tonge | Richmond Park | LDem | (1997-2001) | 1.0% |
| Dr Jenny Tonge | Richmond Park | LDem | (2001-2005) | 2.0% |
| Lord Tope | (Lords) | LDem | (1994-present) | 1.2% |
| Lord Tordoff | (Lords) | LDem | (1981-2016) | 2.1% |
| Lord Touhig | (Lords) | Lab | (2010-present) | 0.9% |
| Don Touhig | Islwyn | Lab | (1997-2001) | 0.2% |
| Don Touhig | Islwyn | Lab | (2001-2005) | 0.8% |
| Don Touhig | Islwyn | Lab | (2005-2010) | 1.8% |
| Mr John Townend | East Yorkshire | Con | (1997-2001) | 0.4% |
| Craig Tracey | North Warwickshire | Con | (2015-2017) | 0.7% |
| Craig Tracey | North Warwickshire | Con | (2017-2019) | 2.7% |
| Craig Tracey | North Warwickshire | Con | (2019-2024) | 1.1% |
| David Tredinnick | Bosworth | Con | (1997-2001) | 0.5% |
| David Tredinnick | Bosworth | Con | (2001-2005) | 1.5% |
| David Tredinnick | Bosworth | Con | (2005-2010) | 2.2% |
| David Tredinnick | Bosworth | Con | (2010-2015) | 1.4% |
| David Tredinnick | Bosworth | Con | (2015-2017) | 0.0% |
| David Tredinnick | Bosworth | Con | (2017-2019) | 2.3% |
| Lord Trees | (Lords) | Crossbench | (2012-present) | 21.4% |
| Lord Trefgarne | (Lords) | Con | (1960-present) | 1.5% |
| Viscount Trenchard | (Lords) | Con | (2004-present) | 2.6% |
| Mr Michael Trend | Windsor | Con | (1997-2001) | 0.0% |
| Mr Michael Trend | Windsor | Con | (2001-2005) | 0.9% |
| Anne-Marie Trevelyan | Berwick-upon-Tweed | Con | (2015-2017) | 0.2% |
| Anne-Marie Trevelyan | Berwick-upon-Tweed | Con | (2017-2019) | 2.1% |
| Anne-Marie Trevelyan | Berwick-upon-Tweed | Con | (2019-2024) | 0.1% |
| Lord Trevethin and Oaksey | (Lords) | Crossbench | (2015-present) | 41.4% |
| Tricia Marwick | Central Fife | SNP | (2007-2011) | 0.2% |
| Tricia Marwick | Mid Fife and Glenrothes | None | (2011-2016) | n/a |
| Tricia Marwick | Mid Fife and Glenrothes | SNP | (2011-2011) | n/a |
| Tricia Marwick | Mid Scotland and Fife | SNP | (2003-2007) | 0.6% |
| Tricia Marwick | Mid Scotland and Fife | SNP | (1999-2003) | 1.5% |
| Jon Trickett | Hemsworth | Lab | (1997-2001) | 0.1% |
| Jon Trickett | Hemsworth | Lab | (2001-2005) | 2.6% |
| Jon Trickett | Hemsworth | Lab | (2005-2010) | 2.7% |
| Jon Trickett | Hemsworth | Lab | (2010-2015) | 1.3% |
| Jon Trickett | Hemsworth | Lab | (2015-2017) | 0.3% |
| Jon Trickett | Hemsworth | Lab | (2017-2019) | 0.0% |
| Jon Trickett | Hemsworth | Lab | (2019-2024) | 0.3% |
| Jon Trickett | Normanton and Hemsworth | Lab | (2024-present) | 2.1% |
| Lord Triesman | (Lords) | Lab | (2004-present) | 0.9% |
| Lord Trimble | (Lords) | Con | (2007-2022) | 1.2% |
| Lord Trimble | (Lords) | Crossbench | (2006-2007) | 21.5% |
| Rt Hon David Trimble | Upper Bann | UUP | (1997-2001) | 2.2% |
| Rt Hon David Trimble | Upper Bann | UUP | (2001-2005) | 0.6% |
| Trish Godman | West Renfrewshire | Lab | (2003-2007) | 0.5% |
| Trish Godman | West Renfrewshire | Lab | (1999-2003) | 1.0% |
| Trish Godman | West Renfrewshire | Lab | (2007-2011) | 0.0% |
| Lord Trotman | (Lords) | Crossbench | (1999-2005) | n/a |
| Laura Trott | Sevenoaks | Con | (2019-2024) | 0.2% |
| Laura Trott | Sevenoaks | Con | (2024-present) | 1.0% |
| Lord True | (Lords) | Con | (2011-present) | 0.9% |
| Baroness Trumpington | (Lords) | Con | (1980-2017) | 1.5% |
| The Bishop of Truro | (Lords) | Bishop | (2001-2008) | 7.1% |
| The Bishop of Truro | (Lords) | Bishop | (2013-2017) | 0.0% |
| Lord Truscott | (Lords) | Lab | (2004-2009) | 0.7% |
| Lord Truscott | (Lords) | Non-affiliated | (2009-present) | 13.0% |
| Elizabeth Truss | South West Norfolk | Con | (2010-2015) | 1.3% |
| Elizabeth Truss | South West Norfolk | Con | (2015-2017) | 0.0% |
| Elizabeth Truss | South West Norfolk | Con | (2017-2019) | 0.3% |
| Elizabeth Truss | South West Norfolk | Con | (2019-2024) | 1.2% |
| Paul Truswell | Pudsey | Lab | (1997-2001) | 0.0% |
| Paul Truswell | Pudsey | Lab | (2001-2005) | 1.5% |
| Paul Truswell | Pudsey | Lab | (2005-2010) | 6.4% |
| Steve Tuckwell | Uxbridge and South Ruislip | Con | (2023-2024) | 0.0% |
| Henry Tufnell | Mid and South Pembrokeshire | Lab | (2024-present) | 0.5% |
| Lord Tugendhat | (Lords) | Con | (1993-present) | 5.2% |
| Thomas Tugendhat | Tonbridge | Con | (2024-present) | 0.0% |
| Thomas Tugendhat | Tonbridge and Malling | Con | (2015-2017) | 0.0% |
| Thomas Tugendhat | Tonbridge and Malling | Con | (2017-2019) | 1.8% |
| Thomas Tugendhat | Tonbridge and Malling | Con | (2019-2024) | 1.7% |
| Lord Tunnicliffe | (Lords) | Lab | (2004-present) | 0.5% |
| Anna Turley | Redcar | Lab | (2015-2017) | 0.9% |
| Anna Turley | Redcar | Lab | (2017-2019) | 0.0% |
| Anna Turley | Redcar | Lab | (2024-present) | 0.0% |
| Matt Turmaine | Watford | Lab | (2024-present) | 0.0% |
| Lord Turnberg | (Lords) | Lab | (2000-present) | 1.1% |
| Lord Turnbull | (Lords) | Crossbench | (2005-present) | 32.1% |
| Andrew Turner | Isle of Wight | Con | (2001-2005) | 1.7% |
| Andrew Turner | Isle of Wight | Con | (2005-2010) | 2.1% |
| Andrew Turner | Isle of Wight | Con | (2010-2015) | 8.4% |
| Andrew Turner | Isle of Wight | Con | (2015-2017) | 2.4% |
| Baroness Turner of Camden | (Lords) | Lab | (1985-2017) | 3.1% |
| Mr Dennis Turner | Wolverhampton South East | Lab | (1997-2001) | 0.2% |
| Mr Dennis Turner | Wolverhampton South East | Lab | (2001-2005) | 1.0% |
| Desmond Turner | Brighton, Kemptown | Lab | (1997-2001) | 2.0% |
| Desmond Turner | Brighton, Kemptown | Lab | (2001-2005) | 2.9% |
| Desmond Turner | Brighton, Kemptown | Lab | (2005-2010) | 1.9% |
| Lord Turner of Ecchinswell | (Lords) | Crossbench | (2005-present) | 12.2% |
| Dr George Turner | North West Norfolk | Lab | (1997-2001) | 0.7% |
| Karl Turner | Kingston upon Hull East | Lab | (2010-2015) | 0.1% |
| Karl Turner | Kingston upon Hull East | Lab | (2015-2017) | 0.7% |
| Karl Turner | Kingston upon Hull East | Lab | (2017-2019) | 0.3% |
| Karl Turner | Kingston upon Hull East | Lab | (2019-2024) | 0.0% |
| Karl Turner | Kingston upon Hull East | Lab | (2024-present) | 0.0% |
| Laurence Turner | Birmingham Northfield | Lab | (2024-present) | 1.6% |
| Neil Turner | Wigan | Lab | (1999-2001) | 0.7% |
| Neil Turner | Wigan | Lab | (2001-2005) | 0.7% |
| Neil Turner | Wigan | Lab | (2005-2010) | 0.3% |
| Derek Twigg | Halton | Lab | (1997-2001) | 0.2% |
| Derek Twigg | Halton | Lab | (2001-2005) | 0.9% |
| Derek Twigg | Halton | Lab | (2005-2010) | 1.7% |
| Derek Twigg | Halton | Lab | (2010-2015) | 1.0% |
| Derek Twigg | Halton | Lab | (2015-2017) | 0.3% |
| Derek Twigg | Halton | Lab | (2017-2019) | 3.1% |
| Derek Twigg | Halton | Lab | (2019-2024) | 0.3% |
| Derek Twigg | Widnes and Halewood | Lab | (2024-present) | 0.7% |
| Stephen Twigg | Enfield, Southgate | Lab | (1997-2001) | 0.5% |
| Stephen Twigg | Enfield, Southgate | Lab | (2001-2005) | 0.7% |
| Stephen Twigg | Liverpool, West Derby | Lab | (2010-2015) | 0.2% |
| Stephen Twigg | Liverpool, West Derby | Lab | (2015-2017) | 1.0% |
| Stephen Twigg | Liverpool, West Derby | Lab | (2017-2019) | 0.0% |
| Liz Twist | Blaydon | Lab | (2017-2019) | 0.0% |
| Liz Twist | Blaydon | Lab | (2019-2024) | 0.3% |
| Liz Twist | Blaydon and Consett | Lab | (2024-present) | 1.1% |
| Baroness Twycross | (Lords) | Lab | (2022-present) | 0.0% |
| Lord Tyler | (Lords) | LDem | (2005-2021) | 1.6% |
| Baroness Tyler of Enfield | (Lords) | LDem | (2011-present) | 0.6% |
| Mr Paul Tyler | North Cornwall | LDem | (1997-2001) | 1.0% |
| Mr Paul Tyler | North Cornwall | LDem | (2001-2005) | 2.3% |
| Mr Bill Tynan | Hamilton South | Lab | (1999-2001) | 1.1% |
| Mr Bill Tynan | Hamilton South | Lab | (2001-2005) | 2.5% |
| Lord Tyrie | (Lords) | Non-affiliated | (2018-present) | 55.6% |
| Andrew Tyrie | Chichester | Con | (1997-2001) | 1.1% |
| Andrew Tyrie | Chichester | Con | (2001-2005) | 2.6% |
| Andrew Tyrie | Chichester | Con | (2005-2010) | 5.6% |
| Andrew Tyrie | Chichester | Con | (2010-2015) | 2.9% |
| Andrew Tyrie | Chichester | Con | (2015-2017) | 1.7% |
| Baroness Uddin | (Lords) | Lab | (1998-2010) | 3.6% |
| Baroness Uddin | (Lords) | Non-affiliated | (2010-present) | 10.8% |
| Lord Udny-Lister | (Lords) | Con | (2020-present) | 0.0% |
| Viscount Ullswater | (Lords) | Con | (2003-2022) | 1.1% |
| Chuka Umunna | Streatham | whilst Independent | (2019-2019) | n/a |
| Chuka Umunna | Streatham | Lab | (2010-2015) | 0.3% |
| Chuka Umunna | Streatham | Lab | (2015-2017) | 1.3% |
| Chuka Umunna | Streatham | whilst Lab | (2017-2019) | 0.4% |
| Chuka Umunna | Streatham | whilst LDem | (2019-2019) | 0.0% |
| Harpreet Uppal | Huddersfield | Lab | (2024-present) | 0.0% |
| Paul Uppal | Wolverhampton South West | Con | (2010-2015) | 0.4% |
| Kitty Ussher | Burnley | Lab | (2005-2010) | 1.1% |
| Baroness Vadera | (Lords) | Lab | (2007-2011) | 0.0% |
| Baroness Vadera | (Lords) | Non-affiliated | (2011-present) | n/a |
| Lord Vaizey of Didcot | (Lords) | Con | (2020-present) | 0.0% |
| Ed Vaizey | Wantage | Con | (2005-2010) | 2.2% |
| Ed Vaizey | Wantage | Con | (2010-2015) | 0.7% |
| Ed Vaizey | Wantage | Con | (2015-2017) | 0.0% |
| Ed Vaizey | Wantage | whilst Con | (2017-2019) | 10.2% |
| Ed Vaizey | Wantage | whilst Independent | (2019-2019) | n/a |
| Baroness Valentine | (Lords) | Crossbench | (2005-present) | 17.1% |
| Lord Vallance of Balham | (Lords) | Lab | (2024-present) | 0.0% |
| Lord Vallance of Tummel | (Lords) | LDem | (2004-2020) | 1.2% |
| Freddie Van Mierlo | Henley and Thame | LDem | (2024-present) | 0.0% |
| Shailesh Vara | North West Cambridgeshire | Con | (2005-2010) | 2.1% |
| Shailesh Vara | North West Cambridgeshire | Con | (2010-2015) | 0.3% |
| Shailesh Vara | North West Cambridgeshire | Con | (2015-2017) | 0.0% |
| Shailesh Vara | North West Cambridgeshire | Con | (2017-2019) | 2.3% |
| Shailesh Vara | North West Cambridgeshire | Con | (2019-2024) | 0.1% |
| Lord Varley | (Lords) | Lab | (1990-2008) | 0.0% |
| Tony Vaughan | Folkestone and Hythe | Lab | (2024-present) | 0.0% |
| Lord Vaux of Harrowden | (Lords) | Crossbench | (2017-present) | 20.5% |
| Keith Vaz | Leicester East | Lab | (1997-2001) | 0.4% |
| Keith Vaz | Leicester East | Lab | (2001-2005) | 1.0% |
| Keith Vaz | Leicester East | Lab | (2005-2010) | 4.6% |
| Keith Vaz | Leicester East | Lab | (2010-2015) | 1.8% |
| Keith Vaz | Leicester East | Lab | (2015-2017) | 3.8% |
| Keith Vaz | Leicester East | Lab | (2017-2019) | 0.0% |
| Valerie Vaz | Walsall and Bloxwich | Lab | (2024-present) | 2.0% |
| Valerie Vaz | Walsall South | Lab | (2010-2015) | 0.1% |
| Valerie Vaz | Walsall South | Lab | (2015-2017) | 0.3% |
| Valerie Vaz | Walsall South | Lab | (2017-2019) | 0.3% |
| Valerie Vaz | Walsall South | Lab | (2019-2024) | 0.0% |
| Lord Verdirame | (Lords) | Non-affiliated | (2022-present) | 44.0% |
| Baroness Vere of Norbiton | (Lords) | Con | (2016-present) | 0.1% |
| Lord Verjee | (Lords) | LDem | (2013-present) | 0.0% |
| Baroness Verma | (Lords) | Con | (2006-present) | 1.0% |
| Martin Vickers | Brigg and Immingham | Con | (2024-present) | 1.4% |
| Martin Vickers | Cleethorpes | Con | (2010-2015) | 4.0% |
| Martin Vickers | Cleethorpes | Con | (2015-2017) | 0.9% |
| Martin Vickers | Cleethorpes | Con | (2017-2019) | 3.7% |
| Martin Vickers | Cleethorpes | Con | (2019-2024) | 0.8% |
| Matt Vickers | Stockton South | Con | (2019-2024) | 0.7% |
| Matt Vickers | Stockton West | Con | (2024-present) | 0.0% |
| Peter Viggers | Gosport | Con | (1997-2001) | 0.8% |
| Peter Viggers | Gosport | Con | (2001-2005) | 1.2% |
| Peter Viggers | Gosport | Con | (2005-2010) | 2.4% |
| Theresa Villiers | Chipping Barnet | Con | (2005-2010) | 2.6% |
| Theresa Villiers | Chipping Barnet | Con | (2010-2015) | 1.4% |
| Theresa Villiers | Chipping Barnet | Con | (2015-2017) | 0.0% |
| Theresa Villiers | Chipping Barnet | Con | (2017-2019) | 2.8% |
| Theresa Villiers | Chipping Barnet | Con | (2019-2024) | 0.6% |
| Christopher Vince | Harlow | Lab | (2024-present) | 0.0% |
| Lord Vincent of Coleshill | (Lords) | Crossbench | (1996-2016) | 13.8% |
| Lord Vinson | (Lords) | Con | (1985-2022) | 5.7% |
| Rudi Vis | Finchley and Golders Green | Lab | (1997-2001) | 1.1% |
| Rudi Vis | Finchley and Golders Green | Lab | (2001-2005) | 3.5% |
| Rudi Vis | Finchley and Golders Green | Lab | (2005-2010) | 2.5% |
| Lord Vivian | (Lords) | Con | (1991-2004) | 0.3% |
| Caroline Voaden | South Devon | LDem | (2024-present) | 0.0% |
| Lord Waddington | (Lords) | Con | (1990-2015) | 1.6% |
| Lord Wade of Chorlton | (Lords) | Con | (1990-2016) | 1.2% |
| The Bishop of Wakefield | (Lords) | Bishop | (2009-2014) | 0.0% |
| The Bishop of Wakefield | (Lords) | Bishop | (1997-2002) | 2.9% |
| Christian Wakeford | Bury South | whilst Con | (2019-2022) | 1.9% |
| Christian Wakeford | Bury South | whilst Lab | (2022-2024) | 0.0% |
| Christian Wakeford | Bury South | Lab | (2024-present) | 0.0% |
| Lord Wakeham | (Lords) | Con | (1992-present) | 0.7% |
| Lord Waldegrave of North Hill | (Lords) | Con | (1999-present) | 2.2% |
| Lord Walker of Aldringham | (Lords) | Crossbench | (2007-present) | 35.7% |
| Mr Cecil Walker | Belfast North | UUP | (1997-2001) | 4.2% |
| Charles Walker | Broxbourne | Con | (2005-2010) | 1.6% |
| Charles Walker | Broxbourne | Con | (2010-2015) | 4.8% |
| Charles Walker | Broxbourne | Con | (2015-2017) | 0.3% |
| Charles Walker | Broxbourne | Con | (2017-2019) | 1.2% |
| Charles Walker | Broxbourne | Con | (2019-2024) | 3.8% |
| Lord Walker of Doncaster | (Lords) | Lab | (1997-2003) | 1.2% |
| Lord Walker of Gestingthorpe | (Lords) | Judge | (2002-2021) | 18.6% |
| Imogen Walker | Hamilton and Clyde Valley | Lab | (2024-present) | 0.6% |
| Robin Walker | Worcester | Con | (2010-2015) | 0.8% |
| Robin Walker | Worcester | Con | (2015-2017) | 0.0% |
| Robin Walker | Worcester | Con | (2017-2019) | 1.6% |
| Robin Walker | Worcester | Con | (2019-2024) | 0.4% |
| Thelma Walker | Colne Valley | Lab | (2017-2019) | 0.5% |
| Lord Walker of Worcester | (Lords) | Con | (1992-2010) | 2.2% |
| Ben Wallace | Lancaster and Wyre | Con | (2005-2010) | 1.7% |
| Ben Wallace | Wyre and Preston North | Con | (2010-2015) | 1.3% |
| Ben Wallace | Wyre and Preston North | Con | (2015-2017) | 0.0% |
| Ben Wallace | Wyre and Preston North | Con | (2017-2019) | 0.8% |
| Ben Wallace | Wyre and Preston North | Con | (2019-2024) | 0.0% |
| Lord Wallace of Coslany | (Lords) | Lab | (1975-2003) | 0.0% |
| Jim Wallace | Orkney and Shetland | LDem | (1997-2001) | 0.8% |
| Lord Wallace of Saltaire | (Lords) | LDem | (1995-present) | 0.9% |
| Lord Wallace of Tankerness | (Lords) | LDem | (2007-2021) | 1.9% |
| Lord Wallace of Tankerness | (Lords) | LDem | (2022-present) | 0.0% |
| Lord Wallace of Tankerness | (Lords) | Non-affiliated | (2021-2022) | 19.0% |
| Joan Walley | Stoke-on-Trent North | Lab | (1997-2001) | 0.4% |
| Joan Walley | Stoke-on-Trent North | Lab | (2001-2005) | 1.7% |
| Joan Walley | Stoke-on-Trent North | Lab | (2005-2010) | 1.8% |
| Joan Walley | Stoke-on-Trent North | Lab | (2010-2015) | 0.8% |
| Jamie Wallis | Bridgend | Con | (2019-2024) | 0.3% |
| Baroness Wall of New Barnet | (Lords) | Lab | (2004-2017) | 0.4% |
| Baroness Walmsley | (Lords) | LDem | (2000-present) | 0.7% |
| Lord Walney | (Lords) | Non-affiliated | (2020-present) | 25.6% |
| Lord Walpole | (Lords) | Crossbench | (1989-2017) | 19.9% |
| Robert Walter | North Dorset | Con | (1997-2001) | 0.4% |
| Robert Walter | North Dorset | Con | (2001-2005) | 2.2% |
| Robert Walter | North Dorset | Con | (2005-2010) | 2.5% |
| Robert Walter | North Dorset | Con | (2010-2015) | 1.3% |
| Lynda Waltho | Stourbridge | Lab | (2005-2010) | 0.4% |
| Lord Walton of Detchant | (Lords) | Crossbench | (1989-2016) | 14.1% |
| David Warburton | Somerton and Frome | Con | (2015-2017) | 0.2% |
| David Warburton | Somerton and Frome | Con | (2017-2019) | 0.5% |
| David Warburton | Somerton and Frome | Con | (2019-2023) | 3.6% |
| Chris Ward | Brighton Kemptown and Peacehaven | Lab | (2024-present) | 0.0% |
| Claire Ward | Watford | Lab | (1997-2001) | 0.1% |
| Claire Ward | Watford | Lab | (2001-2005) | 0.9% |
| Claire Ward | Watford | Lab | (2005-2010) | 1.1% |
| David Ward | Bradford East | LDem | (2010-2015) | 6.0% |
| Charles Wardle | Bexhill and Battle | whilst Con | (1997-2001) | 0.0% |
| Charles Wardle | Bexhill and Battle | whilst Independent | (2001-2001) | n/a |
| Melanie Ward | Cowdenbeath and Kirkcaldy | Lab | (2024-present) | 1.7% |
| Robert Wareing | Liverpool, West Derby | whilst Independent | (2007-2010) | n/a |
| Robert Wareing | Liverpool, West Derby | Lab | (1997-2001) | 3.5% |
| Robert Wareing | Liverpool, West Derby | Lab | (2001-2005) | 11.7% |
| Robert Wareing | Liverpool, West Derby | whilst Lab | (2005-2007) | 13.5% |
| Matt Warman | Boston and Skegness | Con | (2015-2017) | 0.5% |
| Matt Warman | Boston and Skegness | Con | (2017-2019) | 0.7% |
| Matt Warman | Boston and Skegness | Con | (2019-2024) | 0.2% |
| Lord Warner | (Lords) | Crossbench | (2002-2003) | n/a |
| Lord Warner | (Lords) | Crossbench | (2016-2024) | 8.9% |
| Lord Warner | (Lords) | Lab | (1998-2002) | 0.0% |
| Lord Warner | (Lords) | Lab | (2003-2015) | 0.0% |
| Lord Warner | (Lords) | Non-affiliated | (2015-2016) | 8.7% |
| Baroness Warnock | (Lords) | Crossbench | (1985-2015) | 17.1% |
| Baroness Warsi | (Lords) | Con | (2007-present) | 6.1% |
| Baroness Warwick of Undercliffe | (Lords) | Lab | (1999-present) | 0.9% |
| Lord Wasserman | (Lords) | Con | (2011-present) | 4.8% |
| Nigel Waterson | Eastbourne | Con | (1997-2001) | 0.2% |
| Nigel Waterson | Eastbourne | Con | (2001-2005) | 0.6% |
| Nigel Waterson | Eastbourne | Con | (2005-2010) | 0.9% |
| Angela Watkinson | Hornchurch and Upminster | Con | (2010-2015) | 1.7% |
| Angela Watkinson | Hornchurch and Upminster | Con | (2015-2017) | 0.3% |
| Angela Watkinson | Upminster | Con | (2001-2005) | 0.7% |
| Angela Watkinson | Upminster | Con | (2005-2010) | 0.9% |
| Baroness Watkins of Tavistock | (Lords) | Crossbench | (2015-present) | 15.4% |
| Giles Watling | Clacton | Con | (2017-2019) | 2.4% |
| Giles Watling | Clacton | Con | (2019-2024) | 0.8% |
| Lord Watson of Invergowrie | (Lords) | Lab | (1997-present) | 0.4% |
| Lord Watson of Richmond | (Lords) | LDem | (1999-2023) | 1.6% |
| Tom Watson | West Bromwich East | Lab | (2001-2005) | 0.6% |
| Tom Watson | West Bromwich East | Lab | (2005-2010) | 0.5% |
| Tom Watson | West Bromwich East | Lab | (2010-2015) | 1.3% |
| Tom Watson | West Bromwich East | Lab | (2015-2017) | 0.4% |
| Tom Watson | West Bromwich East | Lab | (2017-2019) | 0.3% |
| Lord Watson of Wyre Forest | (Lords) | Lab | (2022-present) | 0.4% |
| Lord Watts | (Lords) | Lab | (2015-present) | 0.9% |
| Dave Watts | St Helens North | Lab | (1997-2001) | 0.3% |
| Dave Watts | St Helens North | Lab | (2001-2005) | 0.8% |
| Dave Watts | St Helens North | Lab | (2005-2010) | 0.4% |
| Dave Watts | St Helens North | Lab | (2010-2015) | 1.2% |
| Paul Waugh | Rochdale | Lab | (2024-present) | 1.1% |
| Viscount Waverley | (Lords) | Crossbench | (1990-present) | 45.3% |
| Lord Weatherill | (Lords) | Crossbench | (1992-2007) | 22.3% |
| Mike Weatherley | Hove | Con | (2010-2015) | 1.9% |
| Chris Webb | Blackpool South | Lab | (2024-2024) | 0.0% |
| Chris Webb | Blackpool South | Lab | (2024-present) | 0.6% |
| Claudia Webbe | Leicester East | whilst Independent | (2020-2024) | n/a |
| Claudia Webbe | Leicester East | whilst Lab | (2019-2020) | 0.0% |
| Steve Webb | Northavon | LDem | (1997-2001) | 1.5% |
| Steve Webb | Northavon | LDem | (2001-2005) | 1.0% |
| Steve Webb | Northavon | LDem | (2005-2010) | 1.7% |
| Steve Webb | Thornbury and Yate | LDem | (2010-2015) | 0.4% |
| Suzanne Webb | Stourbridge | Con | (2019-2024) | 0.1% |
| Lord Wedderburn of Charlton | (Lords) | Crossbench | (2006-2007) | 35.1% |
| Lord Wedderburn of Charlton | (Lords) | Lab | (1977-2006) | 17.6% |
| Lord Wedderburn of Charlton | (Lords) | Lab | (2007-2012) | n/a |
| Lord Wedderburn of Charlton | (Lords) | Other | (2007-2007) | n/a |
| Lord Wei | (Lords) | Con | (2010-present) | 0.4% |
| Lord Weidenfeld | (Lords) | Crossbench | (1976-2016) | 50.0% |
| Lord Weinstock | (Lords) | Crossbench | (1980-2002) | 0.0% |
| Lord Weir of Ballyholme | (Lords) | DUP | (2022-present) | 3.4% |
| Michael Weir | Angus | SNP | (2001-2005) | 0.3% |
| Michael Weir | Angus | SNP | (2005-2010) | 0.6% |
| Michael Weir | Angus | SNP | (2010-2015) | 0.6% |
| Michael Weir | Angus | SNP | (2015-2017) | 0.3% |
| The Duke of Wellington | (Lords) | Con | (2015-2019) | 25.4% |
| The Duke of Wellington | (Lords) | Crossbench | (2020-present) | 13.7% |
| The Duke of Wellington | (Lords) | Non-affiliated | (2019-2020) | 6.7% |
| Mr Bowen Wells | Hertford and Stortford | Con | (1997-2001) | 0.8% |
| Andrew Welsh | Angus | SNP | (1997-2001) | 0.3% |
| Michelle Welsh | Sherwood Forest | Lab | (2024-present) | 0.0% |
| Wendy Alexander | Paisley North | Lab | (2003-2007) | 0.3% |
| Wendy Alexander | Paisley North | Lab | (1999-2003) | 0.8% |
| Wendy Alexander | Paisley North | Lab | (2007-2011) | 0.4% |
| Catherine West | Hornsey and Friern Barnet | Lab | (2024-present) | 0.0% |
| Catherine West | Hornsey and Wood Green | Lab | (2015-2017) | 2.4% |
| Catherine West | Hornsey and Wood Green | Lab | (2017-2019) | 0.3% |
| Catherine West | Hornsey and Wood Green | Lab | (2019-2024) | 0.0% |
| Andrew Western | Stretford and Urmston | Lab | (2022-2024) | 0.4% |
| Andrew Western | Stretford and Urmston | Lab | (2024-present) | 0.0% |
| Matt Western | Warwick and Leamington | Lab | (2017-2019) | 0.3% |
| Matt Western | Warwick and Leamington | Lab | (2019-2024) | 0.4% |
| Matt Western | Warwick and Leamington | Lab | (2024-present) | 0.0% |
| Lord West of Spithead | (Lords) | Lab | (2007-present) | 3.1% |
| Lord Whaddon | (Lords) | Lab | (1978-2005) | 0.0% |
| Baroness Wharton | (Lords) | Crossbench | (1990-2000) | 25.0% |
| James Wharton | Stockton South | Con | (2010-2015) | 0.5% |
| James Wharton | Stockton South | Con | (2015-2017) | 0.0% |
| Lord Wharton of Yarm | (Lords) | Con | (2020-present) | 0.2% |
| Helen Whately | Faversham and Mid Kent | Con | (2015-2017) | 0.0% |
| Helen Whately | Faversham and Mid Kent | Con | (2017-2019) | 0.5% |
| Helen Whately | Faversham and Mid Kent | Con | (2019-2024) | 0.1% |
| Helen Whately | Faversham and Mid Kent | Con | (2024-present) | 0.0% |
| Baroness Wheatcroft | (Lords) | Con | (2011-2019) | 10.9% |
| Baroness Wheatcroft | (Lords) | Crossbench | (2021-present) | 11.7% |
| Baroness Wheatcroft | (Lords) | Non-affiliated | (2019-2021) | 11.3% |
| Baroness Wheeler | (Lords) | Lab | (2010-present) | 0.1% |
| Heather Wheeler | South Derbyshire | Con | (2010-2015) | 2.2% |
| Heather Wheeler | South Derbyshire | Con | (2015-2017) | 0.0% |
| Heather Wheeler | South Derbyshire | Con | (2017-2019) | 0.2% |
| Heather Wheeler | South Derbyshire | Con | (2019-2024) | 0.3% |
| Michael Wheeler | Worsley and Eccles | Lab | (2024-present) | 0.5% |
| Baroness Whitaker | (Lords) | Lab | (1999-present) | 1.0% |
| Lord Whitby | (Lords) | Con | (2013-present) | 0.2% |
| John Whitby | Derbyshire Dales | Lab | (2024-present) | 0.0% |
| Baroness White | (Lords) | Lab | (1970-1999) | n/a |
| Mr Brian White | North East Milton Keynes | Lab | (1997-2001) | 0.2% |
| Mr Brian White | North East Milton Keynes | Lab | (2001-2005) | 1.6% |
| Chris White | Warwick and Leamington | Con | (2010-2015) | 2.3% |
| Chris White | Warwick and Leamington | Con | (2015-2017) | 1.2% |
| Eilidh Whiteford | Banff and Buchan | SNP | (2010-2015) | 0.3% |
| Eilidh Whiteford | Banff and Buchan | SNP | (2015-2017) | 0.0% |
| Alan Whitehead | Southampton, Test | Lab | (1997-2001) | 0.6% |
| Alan Whitehead | Southampton, Test | Lab | (2001-2005) | 0.4% |
| Alan Whitehead | Southampton, Test | Lab | (2005-2010) | 0.8% |
| Alan Whitehead | Southampton, Test | Lab | (2010-2015) | 0.6% |
| Alan Whitehead | Southampton, Test | Lab | (2015-2017) | 1.1% |
| Alan Whitehead | Southampton, Test | Lab | (2017-2019) | 0.3% |
| Alan Whitehead | Southampton, Test | Lab | (2019-2024) | 0.0% |
| Jo White | Bassetlaw | Lab | (2024-present) | 0.0% |
| Katie White | Leeds North West | Lab | (2024-present) | 0.0% |
| Martin Whitfield | East Lothian | Lab | (2017-2019) | 0.5% |
| Philippa Whitford | Central Ayrshire | SNP | (2015-2017) | 0.3% |
| Philippa Whitford | Central Ayrshire | SNP | (2017-2019) | 0.0% |
| Philippa Whitford | Central Ayrshire | SNP | (2019-2024) | 0.0% |
| Mick Whitley | Birkenhead | Lab | (2019-2024) | 0.1% |
| Sir Ray Whitney | Wycombe | Con | (1997-2001) | 1.1% |
| Craig Whittaker | Calder Valley | Con | (2010-2015) | 2.9% |
| Craig Whittaker | Calder Valley | Con | (2015-2017) | 0.0% |
| Craig Whittaker | Calder Valley | Con | (2017-2019) | 0.7% |
| Craig Whittaker | Calder Valley | Con | (2019-2024) | 1.0% |
| John Whittingdale | Maldon | Con | (2010-2015) | 4.4% |
| John Whittingdale | Maldon | Con | (2015-2017) | 0.0% |
| John Whittingdale | Maldon | Con | (2017-2019) | 2.7% |
| John Whittingdale | Maldon | Con | (2019-2024) | 0.1% |
| John Whittingdale | Maldon | Con | (2024-present) | 0.0% |
| John Whittingdale | Maldon and East Chelmsford | Con | (1997-2001) | 0.1% |
| John Whittingdale | Maldon and East Chelmsford | Con | (2001-2005) | 0.3% |
| John Whittingdale | Maldon and East Chelmsford | Con | (2005-2010) | 1.2% |
| Nadia Whittome | Nottingham East | Lab | (2019-2024) | 0.3% |
| Nadia Whittome | Nottingham East | Lab | (2024-present) | 1.7% |
| Lord Whitty | (Lords) | Lab | (1996-present) | 0.8% |
| Malcolm Wicks | Croydon North | Lab | (1997-2001) | 0.2% |
| Malcolm Wicks | Croydon North | Lab | (2001-2005) | 0.4% |
| Malcolm Wicks | Croydon North | Lab | (2005-2010) | 0.4% |
| Malcolm Wicks | Croydon North | Lab | (2010-2012) | 0.6% |
| Ann Widdecombe | Maidstone and The Weald | Con | (1997-2001) | 1.3% |
| Ann Widdecombe | Maidstone and The Weald | Con | (2001-2005) | 4.0% |
| Ann Widdecombe | Maidstone and The Weald | Con | (2005-2010) | 3.5% |
| Bill Wiggin | Leominster | Con | (2001-2005) | 0.8% |
| Bill Wiggin | Leominster | Con | (2005-2010) | 1.8% |
| Bill Wiggin | North Herefordshire | Con | (2010-2015) | 1.9% |
| Bill Wiggin | North Herefordshire | Con | (2015-2017) | 0.0% |
| Bill Wiggin | North Herefordshire | Con | (2017-2019) | 2.9% |
| Bill Wiggin | North Herefordshire | Con | (2019-2024) | 0.8% |
| Lord Wigley | (Lords) | PC | (2011-present) | 0.0% |
| Mr Dafydd Wigley | Caernarfon | PC | (1997-2001) | 0.6% |
| Lord Wigoder | (Lords) | LDem | (1974-2004) | 4.1% |
| Lord Wilberforce | (Lords) | Crossbench | (1964-2003) | 13.3% |
| Baroness Wilcox | (Lords) | Con | (1996-2020) | 1.2% |
| Baroness Wilcox of Newport | (Lords) | Lab | (2019-present) | 0.2% |
| James Wild | North West Norfolk | Con | (2019-2024) | 0.2% |
| James Wild | North West Norfolk | Con | (2024-present) | 1.9% |
| Baroness Wilkins | (Lords) | Lab | (1999-2015) | 1.8% |
| Mr John Wilkinson | Ruislip - Northwood | Con | (1997-2001) | 0.7% |
| Mr John Wilkinson | Ruislip - Northwood | Con | (2001-2005) | 2.3% |
| Max Wilkinson | Cheltenham | LDem | (2024-present) | 0.0% |
| Lord Willetts | (Lords) | Con | (2015-present) | 5.7% |
| David Willetts | Havant | Con | (1997-2001) | 0.0% |
| David Willetts | Havant | Con | (2001-2005) | 0.7% |
| David Willetts | Havant | Con | (2005-2010) | 1.5% |
| David Willetts | Havant | Con | (2010-2015) | 0.7% |
| Dr Alan Williams | Carmarthen East and Dinefwr | Lab | (1997-2001) | 0.2% |
| Alan Williams | Swansea West | Lab | (1997-2001) | 0.5% |
| Alan Williams | Swansea West | Lab | (2001-2005) | 2.4% |
| Alan Williams | Swansea West | Lab | (2005-2010) | 0.8% |
| Lord Williams of Baglan | (Lords) | Crossbench | (2011-2017) | 55.3% |
| Lord Williams of Baglan | (Lords) | Lab | (2010-2010) | n/a |
| Lord Williams of Baglan | (Lords) | Lab | (2011-2011) | n/a |
| Lord Williams of Baglan | (Lords) | Other | (2010-2011) | n/a |
| Betty Williams | Conwy | Lab | (1997-2001) | 2.6% |
| Betty Williams | Conwy | Lab | (2001-2005) | 2.3% |
| Betty Williams | Conwy | Lab | (2005-2010) | 0.9% |
| Craig Williams | Cardiff North | Con | (2015-2017) | 0.0% |
| Craig Williams | Montgomeryshire | Con | (2019-2024) | 0.1% |
| Baroness Williams of Crosby | (Lords) | LDem | (1993-2016) | 4.8% |
| David Williams | Stoke-on-Trent North | Lab | (2024-present) | 2.4% |
| Lord Williams of Elvel | (Lords) | Lab | (1985-2019) | 2.4% |
| Hywel Williams | Arfon | PC | (2010-2015) | 0.4% |
| Hywel Williams | Arfon | PC | (2015-2017) | 0.0% |
| Hywel Williams | Arfon | PC | (2017-2019) | 0.0% |
| Hywel Williams | Arfon | PC | (2019-2024) | 0.1% |
| Hywel Williams | Caernarfon | PC | (2001-2005) | 0.5% |
| Hywel Williams | Caernarfon | PC | (2005-2010) | 0.2% |
| Mark Williams | Ceredigion | LDem | (2005-2010) | 1.4% |
| Mark Williams | Ceredigion | LDem | (2010-2015) | 3.1% |
| Mark Williams | Ceredigion | LDem | (2015-2017) | 1.0% |
| Lord Williams of Mostyn | (Lords) | Lab | (1992-2003) | 1.1% |
| Chris Williamson | Derby North | whilst Independent | (2019-2019) | n/a |
| Chris Williamson | Derby North | whilst Independent | (2019-2019) | n/a |
| Chris Williamson | Derby North | Lab | (2010-2015) | 0.5% |
| Chris Williamson | Derby North | whilst Lab | (2017-2019) | 0.8% |
| Chris Williamson | Derby North | whilst Lab | (2019-2019) | n/a |
| Gavin Williamson | South Staffordshire | Con | (2010-2015) | 1.0% |
| Gavin Williamson | South Staffordshire | Con | (2015-2017) | 0.0% |
| Gavin Williamson | South Staffordshire | Con | (2017-2019) | 0.5% |
| Gavin Williamson | South Staffordshire | Con | (2019-2024) | 0.4% |
| Gavin Williamson | Stone, Great Wyrley and Penkridge | Con | (2024-present) | 2.5% |
| Lord Williamson of Horton | (Lords) | Crossbench | (1999-2015) | 23.7% |
| Lord Williams of Oystermouth | (Lords) | Crossbench | (2013-2020) | 0.0% |
| Paul Williams | Stockton South | Lab | (2017-2019) | 3.2% |
| Roger Williams | Brecon and Radnorshire | LDem | (2001-2005) | 3.3% |
| Roger Williams | Brecon and Radnorshire | LDem | (2005-2010) | 0.9% |
| Roger Williams | Brecon and Radnorshire | LDem | (2010-2015) | 2.4% |
| Stephen Williams | Bristol West | LDem | (2005-2010) | 0.9% |
| Stephen Williams | Bristol West | LDem | (2010-2015) | 0.5% |
| Baroness Williams of Trafford | (Lords) | Con | (2013-present) | 0.5% |
| Willie Coffey | Kilmarnock and Irvine Valley | SNP | (2011-2016) | n/a |
| Willie Coffey | Kilmarnock and Irvine Valley | SNP | (2016-2021) | n/a |
| Willie Coffey | Kilmarnock and Irvine Valley | SNP | (2021-present) | n/a |
| Willie Coffey | Kilmarnock and Loudoun | SNP | (2007-2011) | 0.0% |
| Willie Rennie | Mid Scotland and Fife | LDem | (2011-2016) | n/a |
| Willie Rennie | North East Fife | LDem | (2016-2021) | n/a |
| Willie Rennie | North East Fife | LDem | (2021-present) | n/a |
| Lord Willis of Knaresborough | (Lords) | LDem | (2010-present) | 1.6% |
| Phil Willis | Harrogate and Knaresborough | LDem | (1997-2001) | 1.1% |
| Phil Willis | Harrogate and Knaresborough | LDem | (2001-2005) | 1.1% |
| Phil Willis | Harrogate and Knaresborough | LDem | (2005-2010) | 1.0% |
| Baroness Willis of Summertown | (Lords) | Crossbench | (2022-present) | 7.7% |
| Jennifer Willott | Cardiff Central | LDem | (2005-2010) | 0.6% |
| Jennifer Willott | Cardiff Central | LDem | (2010-2015) | 0.4% |
| Lord Willoughby de Broke | (Lords) | Con | (1986-2004) | 1.1% |
| Lord Willoughby de Broke | (Lords) | Conservative Independent | (2004-2007) | n/a |
| Lord Willoughby de Broke | (Lords) | Non-affiliated | (2018-2024) | 82.2% |
| Lord Willoughby de Broke | (Lords) | UKIP | (2007-2018) | 0.0% |
| Lord Wills | (Lords) | Lab | (2010-present) | 0.6% |
| Michael Wills | North Swindon | Lab | (1997-2001) | 0.0% |
| Michael Wills | North Swindon | Lab | (2001-2005) | 0.3% |
| Michael Wills | North Swindon | Lab | (2005-2010) | 0.7% |
| David Wilshire | Spelthorne | Con | (1997-2001) | 0.2% |
| David Wilshire | Spelthorne | Con | (2001-2005) | 0.8% |
| David Wilshire | Spelthorne | Con | (2005-2010) | 1.8% |
| Mr Brian Wilson | Cunninghame North | Lab | (1997-2001) | 0.0% |
| Mr Brian Wilson | Cunninghame North | Lab | (2001-2005) | 0.7% |
| Corri Wilson | Ayr, Carrick and Cumnock | SNP | (2015-2017) | 0.0% |
| Lord Wilson of Dinton | (Lords) | Crossbench | (2003-present) | 14.6% |
| Munira Wilson | Twickenham | LDem | (2019-2024) | 0.0% |
| Munira Wilson | Twickenham | LDem | (2024-present) | 0.9% |
| Phil Wilson | Sedgefield | Lab | (2007-2010) | 0.6% |
| Phil Wilson | Sedgefield | Lab | (2010-2015) | 0.1% |
| Phil Wilson | Sedgefield | Lab | (2015-2017) | 1.0% |
| Phil Wilson | Sedgefield | Lab | (2017-2019) | 0.3% |
| Rob Wilson | Reading East | Con | (2005-2010) | 1.7% |
| Rob Wilson | Reading East | Con | (2010-2015) | 0.6% |
| Rob Wilson | Reading East | Con | (2015-2017) | 0.0% |
| Sammy Wilson | East Antrim | DUP | (2005-2010) | 1.6% |
| Sammy Wilson | East Antrim | DUP | (2010-2015) | 5.2% |
| Sammy Wilson | East Antrim | DUP | (2015-2017) | 1.2% |
| Sammy Wilson | East Antrim | DUP | (2017-2019) | 0.5% |
| Sammy Wilson | East Antrim | DUP | (2019-2024) | 0.8% |
| Sammy Wilson | East Antrim | DUP | (2024-present) | 0.9% |
| Lord Wilson of Tillyorn | (Lords) | Crossbench | (1992-2021) | 30.3% |
| The Bishop of Winchester | (Lords) | Bishop | (1996-2011) | 7.0% |
| The Bishop of Winchester | (Lords) | Bishop | (2012-2022) | 4.8% |
| The Bishop of Winchester | (Lords) | Bishop | (2023-present) | n/a |
| Lord Windlesham | (Lords) | Con | (1962-2010) | 0.7% |
| David Winnick | Walsall North | Lab | (1997-2001) | 1.9% |
| David Winnick | Walsall North | Lab | (2001-2005) | 2.4% |
| David Winnick | Walsall North | Lab | (2005-2010) | 3.4% |
| David Winnick | Walsall North | Lab | (2010-2015) | 1.2% |
| David Winnick | Walsall North | Lab | (2015-2017) | 0.6% |
| Dr Winnie Ewing | Highlands and Islands | SNP | (1999-2003) | 4.0% |
| Lord Winston | (Lords) | Lab | (1995-present) | 2.3% |
| Beth Winter | Cynon Valley | Lab | (2019-2024) | 0.3% |
| Ann Winterton | Congleton | Con | (1997-2001) | 0.7% |
| Ann Winterton | Congleton | whilst Con | (2001-2004) | 1.2% |
| Ann Winterton | Congleton | whilst Con | (2004-2005) | 1.8% |
| Ann Winterton | Congleton | Con | (2005-2010) | 2.3% |
| Ann Winterton | Congleton | whilst Independent Conservative | (2004-2004) | n/a |
| Baroness Winterton of Doncaster | (Lords) | Lab | (2024-present) | 0.0% |
| Nicholas Winterton | Macclesfield | Con | (1997-2001) | 1.0% |
| Nicholas Winterton | Macclesfield | Con | (2001-2005) | 1.7% |
| Nicholas Winterton | Macclesfield | Con | (2005-2010) | 2.4% |
| Rosie Winterton | Doncaster Central | Lab | (1997-2001) | 0.3% |
| Rosie Winterton | Doncaster Central | Lab | (2001-2005) | 0.7% |
| Rosie Winterton | Doncaster Central | Lab | (2005-2010) | 0.6% |
| Rosie Winterton | Doncaster Central | Lab | (2010-2015) | 0.1% |
| Rosie Winterton | Doncaster Central | Lab | (2015-2017) | 0.3% |
| Rosie Winterton | Doncaster Central | Lab | (2017-2019) | n/a |
| Rosie Winterton | Doncaster Central | Lab | (2019-2024) | 0.0% |
| Ms Audrey Wise | Preston | Lab | (1997-2000) | 5.3% |
| Pete Wishart | North Tayside | SNP | (2001-2005) | 0.0% |
| Pete Wishart | Perth and Kinross-shire | SNP | (2024-present) | 0.0% |
| Pete Wishart | Perth and North Perthshire | SNP | (2005-2010) | 2.2% |
| Pete Wishart | Perth and North Perthshire | SNP | (2010-2015) | 0.3% |
| Pete Wishart | Perth and North Perthshire | SNP | (2015-2017) | 0.3% |
| Pete Wishart | Perth and North Perthshire | SNP | (2017-2019) | 0.0% |
| Pete Wishart | Perth and North Perthshire | SNP | (2019-2024) | 0.0% |
| Steve Witherden | Montgomeryshire and Glyndŵr | Lab | (2024-present) | 0.0% |
| Baroness Wolf of Dulwich | (Lords) | Crossbench | (2015-2020) | 30.3% |
| Baroness Wolf of Dulwich | (Lords) | Non-affiliated | (2020-present) | 26.7% |
| Lord Wolfson | (Lords) | Con | (1985-2010) | 3.6% |
| Lord Wolfson of Aspley Guise | (Lords) | Con | (2010-present) | 0.7% |
| Lord Wolfson of Sunningdale | (Lords) | Con | (1991-2017) | 0.0% |
| Lord Wolfson of Tredegar | (Lords) | Con | (2020-present) | 0.2% |
| Sarah Wollaston | Totnes | Con | (2010-2015) | 3.9% |
| Sarah Wollaston | Totnes | Con | (2015-2017) | 2.3% |
| Sarah Wollaston | Totnes | whilst Con | (2017-2019) | 7.7% |
| Sarah Wollaston | Totnes | whilst Independent | (2019-2019) | n/a |
| Sarah Wollaston | Totnes | whilst LDem | (2019-2019) | 4.8% |
| Lord Wood of Anfield | (Lords) | Lab | (2011-present) | 0.5% |
| John Woodcock | Barrow and Furness | whilst Independent | (2018-2019) | n/a |
| John Woodcock | Barrow and Furness | Lab | (2010-2015) | 0.0% |
| John Woodcock | Barrow and Furness | Lab | (2015-2017) | 0.8% |
| John Woodcock | Barrow and Furness | whilst Lab | (2017-2018) | 0.0% |
| Sean Woodcock | Banbury | Lab | (2024-present) | 1.0% |
| Lord Woodley | (Lords) | Lab | (2020-present) | 0.3% |
| Mike Wood | Batley and Spen | Lab | (1997-2001) | 3.2% |
| Mike Wood | Batley and Spen | Lab | (2001-2005) | 7.8% |
| Mike Wood | Batley and Spen | Lab | (2005-2010) | 12.4% |
| Mike Wood | Batley and Spen | Lab | (2010-2015) | 2.6% |
| Mike Wood | Dudley South | Con | (2015-2017) | 0.0% |
| Mike Wood | Dudley South | Con | (2017-2019) | 0.5% |
| Mike Wood | Dudley South | Con | (2019-2024) | 0.3% |
| Mike Wood | Kingswinford and South Staffordshire | Con | (2024-present) | 1.3% |
| Shaun Woodward | St Helens South | Lab | (2001-2005) | 0.4% |
| Shaun Woodward | St Helens South | Lab | (2005-2010) | 0.5% |
| Shaun Woodward | St Helens South and Whiston | Lab | (2010-2015) | 0.0% |
| Shaun Woodward | Witney | whilst Con | (1997-1999) | 0.7% |
| Shaun Woodward | Witney | whilst Lab | (1999-2001) | 0.0% |
| Phil Woolas | Oldham East and Saddleworth | Lab | (1997-2001) | 0.4% |
| Phil Woolas | Oldham East and Saddleworth | Lab | (2001-2005) | 0.5% |
| Phil Woolas | Oldham East and Saddleworth | Lab | (2005-2010) | 0.7% |
| Phil Woolas | Oldham East and Saddleworth | Lab | (2010-2010) | 0.0% |
| Lord Woolf | (Lords) | Crossbench | (1992-present) | 16.6% |
| Lord Woolley of Woodford | (Lords) | Crossbench | (2019-present) | 19.6% |
| Lord Woolmer of Leeds | (Lords) | Lab | (1999-2020) | 0.4% |
| The Bishop of Worcester | (Lords) | Bishop | (2002-2007) | 7.6% |
| The Bishop of Worcester | (Lords) | Bishop | (2012-2024) | 0.0% |
| Baroness Worthington | (Lords) | Crossbench | (2018-present) | 7.1% |
| Baroness Worthington | (Lords) | Lab | (2011-2017) | 0.0% |
| Baroness Worthington | (Lords) | Non-affiliated | (2017-2018) | 0.0% |
| Mr Tony Worthington | Clydebank and Milngavie | Lab | (1997-2001) | 1.1% |
| Mr Tony Worthington | Clydebank and Milngavie | Lab | (2001-2005) | 1.0% |
| William Wragg | Hazel Grove | Con | (2015-2017) | 0.7% |
| William Wragg | Hazel Grove | Con | (2017-2019) | 3.5% |
| William Wragg | Hazel Grove | Con | (2019-2024) | 8.9% |
| Mr Jimmy Wray | Glasgow Baillieston | Lab | (1997-2001) | 0.8% |
| Mr Jimmy Wray | Glasgow Baillieston | Lab | (2001-2005) | 3.2% |
| Lord Wrigglesworth | (Lords) | LDem | (2013-present) | 0.3% |
| Anthony D Wright | Great Yarmouth | Lab | (1997-2001) | 1.0% |
| Anthony D Wright | Great Yarmouth | Lab | (2001-2005) | 1.4% |
| Anthony D Wright | Great Yarmouth | Lab | (2005-2010) | 1.2% |
| David Wright | Telford | Lab | (2001-2005) | 0.8% |
| David Wright | Telford | Lab | (2005-2010) | 0.7% |
| David Wright | Telford | Lab | (2010-2015) | 0.6% |
| Iain Wright | Hartlepool | Lab | (2004-2005) | 0.5% |
| Iain Wright | Hartlepool | Lab | (2005-2010) | 0.7% |
| Iain Wright | Hartlepool | Lab | (2010-2015) | 0.0% |
| Iain Wright | Hartlepool | Lab | (2015-2017) | 0.9% |
| Rosie Wrighting | Kettering | Lab | (2024-present) | 0.0% |
| Jeremy Wright | Kenilworth and Southam | Con | (2010-2015) | 0.8% |
| Jeremy Wright | Kenilworth and Southam | Con | (2015-2017) | 0.0% |
| Jeremy Wright | Kenilworth and Southam | Con | (2017-2019) | 0.8% |
| Jeremy Wright | Kenilworth and Southam | Con | (2019-2024) | 1.4% |
| Jeremy Wright | Kenilworth and Southam | Con | (2024-present) | 0.0% |
| Jeremy Wright | Rugby and Kenilworth | Con | (2005-2010) | 0.9% |
| Lord Wright of Richmond | (Lords) | Crossbench | (1994-2019) | 19.7% |
| Simon Wright | Norwich South | LDem | (2010-2015) | 0.3% |
| Tony Wright | Cannock Chase | Lab | (1997-2001) | 1.4% |
| Tony Wright | Cannock Chase | Lab | (2001-2005) | 2.5% |
| Tony Wright | Cannock Chase | Lab | (2005-2010) | 1.7% |
| Martin Wrigley | Newton Abbot | LDem | (2024-present) | 0.0% |
| Lord Wrottesley | (Lords) | Con | (2022-present) | 0.0% |
| Derek Wyatt | Sittingbourne and Sheppey | Lab | (1997-2001) | 1.3% |
| Derek Wyatt | Sittingbourne and Sheppey | Lab | (2001-2005) | 1.6% |
| Derek Wyatt | Sittingbourne and Sheppey | Lab | (2005-2010) | 0.4% |
| Baroness Wyld | (Lords) | Con | (2017-present) | 0.2% |
| Yuan Yang | Earley and Woodley | Lab | (2024-present) | 0.0% |
| Mohammad Yasin | Bedford | Lab | (2017-2019) | 0.3% |
| Mohammad Yasin | Bedford | Lab | (2019-2024) | 0.1% |
| Mohammad Yasin | Bedford | Lab | (2024-present) | 0.6% |
| Steve Yemm | Mansfield | Lab | (2024-present) | 0.0% |
| Tim Yeo | South Suffolk | Con | (1997-2001) | 0.1% |
| Tim Yeo | South Suffolk | Con | (2001-2005) | 0.8% |
| Tim Yeo | South Suffolk | Con | (2005-2010) | 0.7% |
| Tim Yeo | South Suffolk | Con | (2010-2015) | 1.3% |
| The Archbishop of York | (Lords) | Bishop | (1990-2005) | n/a |
| The Archbishop of York | (Lords) | Bishop | (2006-2020) | 1.7% |
| The Archbishop of York | (Lords) | Bishop | (2020-present) | n/a |
| Baroness Young | (Lords) | Con | (1971-2002) | 0.0% |
| Claire Young | Thornbury and Yate | LDem | (2024-present) | 0.0% |
| Lord Young of Cookham | (Lords) | Con | (2015-present) | 1.9% |
| Lord Young of Dartington | (Lords) | Lab | (1978-2002) | 4.2% |
| Richard Younger-Ross | Teignbridge | LDem | (2001-2005) | 2.3% |
| Richard Younger-Ross | Teignbridge | LDem | (2005-2010) | 1.8% |
| Viscount Younger of Leckie | (Lords) | Con | (1997-2003) | 0.0% |
| Viscount Younger of Leckie | (Lords) | Con | (2010-present) | 0.4% |
| George Young | North West Hampshire | Con | (1997-2001) | 0.9% |
| George Young | North West Hampshire | Con | (2001-2005) | 2.3% |
| George Young | North West Hampshire | Con | (2005-2010) | 3.8% |
| George Young | North West Hampshire | Con | (2010-2015) | 0.7% |
| Lord Young of Graffham | (Lords) | Con | (1984-2022) | 1.5% |
| Baroness Young of Hornsey | (Lords) | Crossbench | (2004-present) | 20.9% |
| Jacob Young | Redcar | Con | (2019-2024) | 0.4% |
| Lord Young of Norwood Green | (Lords) | Lab | (2004-present) | 1.0% |
| Baroness Young of Old Scone | (Lords) | Lab | (1997-2000) | 0.0% |
| Baroness Young of Old Scone | (Lords) | Lab | (2015-present) | 0.3% |
| Baroness Young of Old Scone | (Lords) | Non-affiliated | (2000-2015) | n/a |
| Lord Young of Old Windsor | (Lords) | Non-affiliated | (2023-present) | 51.9% |
| Nadhim Zahawi | Stratford-on-Avon | Con | (2010-2015) | 0.9% |
| Nadhim Zahawi | Stratford-on-Avon | Con | (2015-2017) | 0.0% |
| Nadhim Zahawi | Stratford-on-Avon | Con | (2017-2019) | 0.2% |
| Nadhim Zahawi | Stratford-on-Avon | Con | (2019-2024) | 0.0% |
| Daniel Zeichner | Cambridge | Lab | (2015-2017) | 2.7% |
| Daniel Zeichner | Cambridge | Lab | (2017-2019) | 1.5% |
| Daniel Zeichner | Cambridge | Lab | (2019-2024) | 0.0% |
| Daniel Zeichner | Cambridge | Lab | (2024-present) | 0.0% |
