Lords — All on record
Members of the House of Lords (part of the UK Parliament) are listed below. Refer to this explanation of the "rebellion" and "attendance" rates, as they may not mean what you think they do.
Sort by: Name | Party | Dates | Rebellions
| Name | Party | Dates | Rebellions (explain...) |
| Lord Aberdare | Con | (1958-2005) | 0.0% |
| Lord Aberdare | Crossbench | (2009-present) | 24.8% |
| Lord Ackner | Crossbench | (1986-2006) | 14.7% |
| Lord Acton | Lab | (2000-2010) | 1.5% |
| Baroness Adams of Craigielea | Lab | (2005-present) | 0.6% |
| Lord Addington | LDem | (1982-present) | 0.6% |
| Lord Adebowale | Crossbench | (2001-present) | 23.1% |
| Lord Adonis | Lab | (2005-present) | 1.3% |
| Baroness Afshar | Crossbench | (2007-2022) | 45.3% |
| Lord Agnew of Oulton | Con | (2017-present) | 1.7% |
| Lord Ahmad of Wimbledon | Con | (2011-present) | 0.4% |
| Lord Ahmed | Lab | (1998-2009) | 5.1% |
| Lord Ahmed | Lab | (2009-2013) | n/a |
| Lord Ahmed | Non-affiliated | (2013-2020) | 4.7% |
| Lord Ahmed | Other | (2009-2009) | n/a |
| Lord Alderdice | LDem | (1996-present) | 0.6% |
| Lord Aldington | Con | (1962-2000) | 0.0% |
| Lord Alexander of Weedon | Con | (1988-2005) | 15.7% |
| Lord Allan of Hallam | LDem | (2010-present) | 0.7% |
| Lord Allen of Abbeydale | Crossbench | (1976-2007) | 37.5% |
| Viscount Allenby of Megiddo | Crossbench | (1984-2014) | 21.0% |
| Lord Allen of Kensington | Lab | (2013-present) | 0.0% |
| Lord Alli | Lab | (1998-present) | 0.8% |
| Lord Alliance | LDem | (2004-present) | 2.8% |
| Baroness Altmann | Con | (2015-present) | 16.7% |
| Lord Alton of Liverpool | Crossbench | (1997-present) | 25.0% |
| Lord Altrincham | Con | (2021-present) | 0.0% |
| Baroness Amos | Lab | (1997-2009) | 0.9% |
| Baroness Amos | Lab | (2018-present) | 0.0% |
| Baroness Amos | Non-affiliated | (2009-2018) | n/a |
| Lord Ampthill | Crossbench | (1973-2011) | 23.3% |
| Lord Anderson of Ipswich | Crossbench | (2018-present) | 15.6% |
| Baroness Anderson of Stoke-on-Trent | Lab | (2022-present) | 0.0% |
| Lord Anderson of Swansea | Lab | (2005-present) | 1.0% |
| Baroness Andrews | Lab | (2000-present) | 0.5% |
| Baroness Anelay of St Johns | Con | (1996-present) | 0.4% |
| Lord Annan | Crossbench | (1965-2000) | 100.0% |
| Lord Arbuthnot of Edrom | Con | (2015-present) | 6.5% |
| Lord Archer of Sandwell | Lab | (1992-2012) | 0.7% |
| Lord Archer of Weston-Super-Mare | Con | (1992-1999) | n/a |
| Lord Archer of Weston-Super-Mare | Non-affiliated | (1999-2024) | 100.0% |
| Baroness Armstrong of Hill Top | Lab | (2010-present) | 0.3% |
| Lord Armstrong of Ilminster | Crossbench | (1988-2020) | 29.7% |
| The Earl of Arran | Con | (1983-present) | 1.5% |
| Lord Ashcombe | Con | (2022-present) | 0.0% |
| Lord Ashcroft | Con | (2000-2015) | 1.4% |
| Lord Ashdown of Norton-sub-Hamdon | LDem | (2001-2018) | 0.9% |
| Lord Ashley of Stoke | Lab | (1992-2012) | 1.6% |
| Lord Ashton of Hyde | Con | (2011-present) | 0.2% |
| Baroness Ashton of Upholland | Lab | (1999-2008) | 0.0% |
| Baroness Ashton of Upholland | Non-affiliated | (2008-present) | 7.1% |
| Baroness Ashton of Upholland | Other | (1999-1999) | n/a |
| Viscount Astor | Con | (1966-present) | 2.7% |
| Lord Astor of Hever | Con | (1984-2022) | 0.6% |
| Lord Attenborough | Lab | (1993-2012) | 0.0% |
| Lord Attenborough | Non-affiliated | (2012-2014) | n/a |
| Earl Attlee | Con | (1991-present) | 1.5% |
| Lord Austin of Dudley | Non-affiliated | (2020-present) | 21.3% |
| Lord Avebury | LDem | (1971-2016) | 4.6% |
| Lord Bach | Lab | (1998-present) | 0.4% |
| Lord Bagri | Con | (1997-2010) | 4.9% |
| Lord Bailey of Paddington | Con | (2023-present) | 0.0% |
| Lord Baker of Dorking | Con | (1997-present) | 3.4% |
| Baroness Bakewell | Lab | (2011-present) | 0.8% |
| Baroness Bakewell of Hardington Mandeville | LDem | (2013-present) | 0.2% |
| Earl Baldwin of Bewdley | Crossbench | (1976-2018) | 36.4% |
| Lord Balfe | Con | (2013-present) | 6.3% |
| Lord Ballyedmond | Con | (2007-2014) | n/a |
| Lord Ballyedmond | Crossbench | (2004-2007) | 25.0% |
| Lord Bamford | Con | (2013-2024) | 0.0% |
| Lord Banner | Con | (2024-present) | 0.0% |
| Lord Bannside | DUP | (2010-2014) | 0.0% |
| Lord Barber | Con | (1975-2005) | 0.0% |
| Lord Barber of Tewkesbury | Crossbench | (1992-2016) | 12.5% |
| Baroness Barker | LDem | (1999-present) | 0.6% |
| Lord Barker of Battle | Con | (2015-present) | 0.0% |
| Lord Barnett | Lab | (1983-2014) | 2.2% |
| Baroness Barran | Con | (2018-present) | 0.1% |
| Lord Barwell | Con | (2019-present) | 2.3% |
| Lord Bassam of Brighton | Lab | (1997-present) | 0.3% |
| Lord Bates | Con | (2008-present) | 0.4% |
| The Bishop of Bath and Wells | Bishop | (1997-2001) | 0.0% |
| The Bishop of Bath and Wells | Bishop | (2008-2013) | 7.5% |
| Baroness Batters | Crossbench | (2024-present) | 0.0% |
| Lord Bauer | Con | (1983-2002) | n/a |
| Lord Beamish | Lab | (2024-present) | 0.0% |
| Lord Beaumont of Whitley | Green | (1967-2008) | 0.0% |
| Baroness Beckett | Lab | (2024-present) | 0.0% |
| Lord Beecham | Lab | (2010-2021) | 0.8% |
| Lord Beith | LDem | (2015-present) | 0.7% |
| Lord Bell | Con | (1998-2019) | 0.6% |
| Lord Bellamy | Con | (2022-present) | 0.0% |
| Lord Bellingham | Con | (2020-present) | 0.4% |
| Lord Bellwin | Con | (1979-2001) | 0.0% |
| Lord Belstead | Con | (1958-2005) | 0.0% |
| Baroness Benjamin | LDem | (2010-present) | 1.3% |
| Baroness Bennett of Manor Castle | Green | (2019-present) | 0.0% |
| Lord Benyon | Con | (2021-present) | 0.5% |
| Lord Berkeley | Lab | (2000-present) | 2.4% |
| Lord Berkeley of Knighton | Crossbench | (2013-present) | 13.8% |
| Lord Bernstein of Craigweil | Lab | (2000-2010) | 1.2% |
| Baroness Berridge | Con | (2011-present) | 1.3% |
| Baroness Bertin | Con | (2016-present) | 0.6% |
| Lord Best | Crossbench | (2001-present) | 9.4% |
| Lord Bethell | Con | (2018-present) | 1.3% |
| Lord Bew | Crossbench | (2007-present) | 49.7% |
| Lord Bhatia | Crossbench | (2001-2010) | 54.9% |
| Lord Bhatia | Non-affiliated | (2010-2023) | 29.9% |
| Lord Bhatia | Other | (2001-2001) | n/a |
| Lord Bhattacharyya | Lab | (2004-2019) | 0.3% |
| Lord Bichard | Crossbench | (2010-present) | 14.0% |
| Lord Biffen | Con | (1997-2007) | 3.5% |
| Lord Bilimoria | Crossbench | (2006-present) | 20.7% |
| Baroness Billingham | Lab | (2000-present) | 0.6% |
| Lord Bilston | Lab | (2005-2014) | 0.5% |
| Lord Bingham of Cornhill | Crossbench | (1996-2010) | 0.0% |
| Lord Bird | Crossbench | (2015-present) | 15.4% |
| The Bishop of Birmingham | Bishop | (1994-2002) | 0.0% |
| The Bishop of Birmingham | Bishop | (2010-2022) | 2.5% |
| Lord Birt | Crossbench | (2000-present) | 23.0% |
| Lord Black of Brentwood | Con | (2010-present) | 1.4% |
| The Bishop of Blackburn | Bishop | (1999-2003) | 0.0% |
| The Bishop of Blackburn | Bishop | (2009-2012) | 0.0% |
| The Bishop of Blackburn | Bishop | (2019-2022) | 5.9% |
| Lord Black of Crossharbour | Con | (2001-2007) | 0.0% |
| Lord Black of Crossharbour | Non-affiliated | (2007-2024) | n/a |
| Baroness Blackstone | Independent Labour | (2018-present) | n/a |
| Baroness Blackstone | Lab | (1987-2018) | 1.0% |
| Baroness Black of Strome | Crossbench | (2021-present) | 16.7% |
| Lord Blackwell | Con | (1997-present) | 2.7% |
| Baroness Blackwood of North Oxford | Con | (2019-present) | 0.2% |
| Lord Blair of Boughton | Crossbench | (2010-present) | 20.2% |
| Lord Blake | Con | (1971-2003) | 0.0% |
| Baroness Blake of Leeds | Lab | (2021-present) | 0.2% |
| Lord Blaker | Con | (1994-2009) | 1.0% |
| Baroness Blatch | Con | (1987-2005) | 0.5% |
| Lord Blease | Lab | (1978-2008) | 3.9% |
| Viscount Bledisloe | Crossbench | (1979-2009) | 14.9% |
| Lord Blencathra | Con | (2011-present) | 3.0% |
| Baroness Blood | Lab | (1999-2018) | 3.3% |
| Baroness Bloomfield of Hinton Waldrist | Con | (2016-present) | 0.0% |
| Baroness Blower | Lab | (2019-present) | 0.6% |
| Lord Blunkett | Lab | (2015-present) | 0.5% |
| Lord Blyth of Rowington | Con | (1995-2018) | 0.0% |
| Lord Boardman | Con | (1980-2003) | 0.4% |
| Lord Boateng | Lab | (2010-present) | 0.6% |
| Baroness Bonham-Carter of Yarnbury | LDem | (2004-present) | 0.1% |
| Lord Booth | Con | (2024-present) | 0.0% |
| Lord Booth-Smith | Con | (2024-present) | 0.0% |
| Baroness Boothroyd | Crossbench | (2001-2023) | 29.2% |
| Lord Borrie | Lab | (1995-2016) | 1.5% |
| Lord Borwick | Con | (2013-present) | 0.5% |
| Lord Boston of Faversham | Crossbench | (1976-2011) | 48.8% |
| Lord Boswell of Aynho | Con | (2010-2012) | 0.5% |
| Lord Boswell of Aynho | Non-affiliated | (2012-present) | 11.1% |
| Lord Botham | Crossbench | (2020-present) | 66.7% |
| Baroness Bottomley of Nettlestone | Con | (2005-present) | 0.5% |
| Lord Bourne of Aberystwyth | Con | (2013-present) | 1.8% |
| Baroness Bowles of Berkhamsted | LDem | (2015-present) | 0.0% |
| Lord Bowness | Con | (1996-2020) | 10.4% |
| Lord Bowness | Non-affiliated | (2020-present) | 13.3% |
| Lord Boyce | Crossbench | (2003-2022) | 21.1% |
| Baroness Boycott | Crossbench | (2018-present) | 8.9% |
| Lord Boyd of Duncansby | Crossbench | (2006-2006) | 50.0% |
| Lord Boyd of Duncansby | Lab | (2006-2012) | 0.8% |
| Lord Boyd of Duncansby | Non-affiliated | (2012-present) | n/a |
| Lord Brabazon of Tara | Con | (2012-2022) | 0.9% |
| Lord Brabazon of Tara | Crossbench | (1974-2012) | 16.2% |
| The Bishop of Bradford | Bishop | (1997-2002) | 20.0% |
| The Bishop of Bradford | Bishop | (2009-2010) | 0.0% |
| Lord Bradley | Lab | (2006-present) | 0.1% |
| Lord Bradshaw | LDem | (1999-present) | 1.6% |
| Baroness Brady | Con | (2014-present) | 0.3% |
| Lord Brady of Altrincham | Con | (2024-present) | 0.0% |
| Lord Bragg | Lab | (1998-present) | 3.0% |
| Lord Braine of Wheatley | Con | (1992-2000) | n/a |
| Lord Bramall | Crossbench | (1987-2013) | 18.1% |
| Baroness Bray of Coln | Con | (2022-present) | 0.0% |
| Lord Brennan | Lab | (2000-2020) | 4.9% |
| Lord Brennan | Non-affiliated | (2020-present) | 8.4% |
| Lord Brett | Lab | (1999-2012) | 1.0% |
| Lord Bridge of Harwich | Crossbench | (1980-2007) | 0.0% |
| Viscount Bridgeman | Con | (1982-present) | 0.5% |
| Lord Bridges | Crossbench | (1969-2016) | 16.4% |
| Lord Bridges of Headley | Con | (2015-present) | 1.1% |
| Lord Briggs | Crossbench | (1976-2016) | 42.9% |
| Lord Brightman | Crossbench | (1982-2006) | 19.8% |
| Baroness Brigstocke | Con | (1990-2004) | 1.3% |
| Baroness Brinton | LDem | (2011-present) | 1.0% |
| The Bishop of Bristol | Bishop | (1990-2002) | 0.0% |
| The Bishop of Bristol | Bishop | (2009-2017) | 0.0% |
| The Bishop of Bristol | Bishop | (2018-present) | 0.0% |
| Lord Brittan of Spennithorne | Con | (2000-2015) | 2.6% |
| Lord Broers | Crossbench | (2004-2021) | 25.0% |
| Lord Brooke of Alverthorpe | Lab | (1997-present) | 1.3% |
| Viscount Brookeborough | Crossbench | (1987-present) | 35.1% |
| Lord Brookes | Crossbench | (1976-2002) | n/a |
| Lord Brooke of Sutton Mandeville | Con | (2001-2015) | 1.4% |
| Baroness Brooke of Ystradfellte | Other | (1964-2000) | n/a |
| Lord Brookman | Lab | (1998-2020) | 1.5% |
| Lord Brooks of Tremorfa | Lab | (1979-2016) | 3.8% |
| Lord Brougham and Vaux | Con | (1967-2023) | 0.7% |
| Baroness Brown of Cambridge | Crossbench | (2015-present) | 9.3% |
| Lord Browne-Wilkinson | Crossbench | (1991-2016) | n/a |
| Lord Brown of Eaton-under-Heywood | Judge | (2004-2023) | 10.2% |
| Lord Browne of Belmont | DUP | (2006-present) | 0.4% |
| Lord Browne of Ladyton | Lab | (2010-present) | 0.2% |
| Lord Browne of Madingley | Crossbench | (2001-present) | 18.2% |
| Baroness Browning | Con | (2010-present) | 1.5% |
| Lord Brownlow of Shurlock Row | Con | (2019-present) | 0.6% |
| Lord Bruce-Lockhart | Con | (2006-2008) | 0.0% |
| Lord Bruce of Bennachie | LDem | (2015-present) | 0.1% |
| Lord Bruce of Donington | Lab | (1975-2005) | 18.1% |
| Baroness Bryan of Partick | Lab | (2018-present) | 0.9% |
| Baroness Bull | Crossbench | (2018-present) | 5.0% |
| Lord Bullock | Crossbench | (1976-2004) | n/a |
| Lord Burlison | Lab | (1997-2008) | 0.1% |
| Lord Burnett | LDem | (2006-present) | 2.8% |
| Lord Burnett of Maldon | Non-affiliated | (2017-present) | 33.3% |
| Lord Burnham | Con | (1993-2005) | 1.0% |
| Lord Burns | Crossbench | (1998-present) | 33.3% |
| Baroness Burt of Solihull | LDem | (2015-present) | 0.0% |
| Baroness Buscombe | Con | (1998-present) | 1.2% |
| Baroness Butler-Sloss | Crossbench | (2006-present) | 17.9% |
| Lord Butler of Brockwell | Crossbench | (1998-present) | 28.0% |
| Lord Butterfield | Con | (1988-2000) | 0.0% |
| Lord Butterworth | Con | (1985-2003) | 0.0% |
| Lord Buxton of Alsa | Con | (1978-2009) | 5.3% |
| Baroness Byford | Con | (1996-2020) | 0.7% |
| Lord Caine | Con | (2016-present) | 0.3% |
| The Earl of Caithness | Con | (1965-present) | 2.2% |
| Lord Callaghan of Cardiff | Lab | (1987-2005) | n/a |
| Lord Callanan | Con | (2014-present) | 0.4% |
| Lord Cameron of Chipping Norton | Con | (2023-present) | 2.7% |
| Lord Cameron of Dillington | Crossbench | (2004-present) | 31.3% |
| Lord Cameron of Lochbroom | Crossbench | (1984-2016) | 24.3% |
| Lord Cameron of Lochiel | Con | (2024-present) | 0.0% |
| Lord Camoys | Con | (2023-present) | 0.0% |
| Lord Campbell-Savours | Lab | (2001-present) | 1.8% |
| Lord Campbell of Alloway | Con | (1981-2013) | 2.0% |
| Lord Campbell of Croy | Con | (1975-2005) | 0.7% |
| Baroness Campbell of Loughborough | Crossbench | (2008-present) | 36.4% |
| Lord Campbell of Pittenweem | LDem | (2015-present) | 0.8% |
| Baroness Campbell of Surbiton | Crossbench | (2007-present) | 15.6% |
| Viscount Camrose | Con | (2022-present) | 0.0% |
| The Archbishop of Canterbury | Bishop | (2003-2012) | 0.0% |
| The Archbishop of Canterbury | Bishop | (1991-2002) | n/a |
| The Archbishop of Canterbury | Bishop | (2013-present) | 0.0% |
| Lord Carey of Clifton | Crossbench | (2002-present) | 47.0% |
| Lord Carlile of Berriew | Crossbench | (2017-present) | 21.1% |
| Lord Carlile of Berriew | LDem | (1999-2017) | 8.8% |
| The Bishop of Carlisle | Bishop | (1996-2000) | n/a |
| The Bishop of Carlisle | Bishop | (2007-2009) | 0.0% |
| The Bishop of Carlisle | Bishop | (2013-2023) | 3.1% |
| Lord Carlisle of Bucklow | Con | (1987-2005) | 1.8% |
| Lord Carmichael of Kelvingrove | Lab | (1983-2001) | n/a |
| The Earl of Carnarvon | Crossbench | (1987-2001) | 11.1% |
| Baroness Carnegy of Lour | Con | (1982-2010) | 1.2% |
| Lord Carr of Hadley | Con | (1976-2012) | 0.0% |
| Lord Carrington | Con | (1999-2018) | 3.0% |
| Lord Carrington | Crossbench | (2018-present) | 71.7% |
| Lord Carrington of Fulham | Con | (2013-present) | 1.0% |
| Baroness Carr of Walton-on-the-Hill | Crossbench | (2023-present) | n/a |
| Lord Carswell | Crossbench | (2004-2019) | 27.0% |
| Lord Carter | Lab | (1987-2006) | 0.5% |
| Lord Carter of Barnes | Lab | (2008-2017) | 3.8% |
| Lord Carter of Barnes | Non-affiliated | (2017-present) | n/a |
| Lord Carter of Coles | Lab | (2004-present) | 0.7% |
| Lord Carter of Haslemere | Crossbench | (2019-present) | 55.6% |
| Lord Carver | Crossbench | (1977-2001) | 28.6% |
| Baroness Casey of Blackstock | Crossbench | (2020-present) | 4.8% |
| Lord Cashman | Lab | (2014-2019) | 1.3% |
| Lord Cashman | Non-affiliated | (2019-present) | 7.7% |
| Baroness Cass | Crossbench | (2024-present) | 0.0% |
| Baroness Castle of Blackburn | Lab | (1990-2002) | 3.2% |
| Earl Cathcart | Con | (2007-present) | 1.1% |
| Lord Cavendish of Furness | Con | (1990-2021) | 1.0% |
| Baroness Cavendish of Little Venice | Con | (2016-2016) | 0.0% |
| Baroness Cavendish of Little Venice | Crossbench | (2019-present) | 54.7% |
| Baroness Cavendish of Little Venice | Non-affiliated | (2016-2019) | 29.4% |
| Lord Chadlington | Con | (1996-present) | 0.2% |
| Baroness Chakrabarti | Lab | (2016-present) | 0.3% |
| Lord Chalfont | Crossbench | (1964-2015) | 20.8% |
| Baroness Chalker of Wallasey | Con | (1992-2023) | 1.7% |
| Lord Chan | Crossbench | (2001-2006) | 31.5% |
| Viscount Chandos | Lab | (2000-present) | 0.9% |
| Baroness Chapman | Crossbench | (2004-2009) | 12.5% |
| Baroness Chapman of Darlington | Lab | (2021-present) | 0.2% |
| Lord Chapple | Crossbench | (1985-2004) | n/a |
| Lord Charteris of Amisfield | Crossbench | (1978-1999) | n/a |
| Lord Chartres | Crossbench | (2017-present) | 37.9% |
| The Bishop of Chelmsford | Bishop | (2000-2003) | 6.7% |
| The Bishop of Chelmsford | Bishop | (2014-2020) | 0.0% |
| The Bishop of Chelmsford | Bishop | (2003-2009) | 7.1% |
| The Bishop of Chelmsford | Bishop | (2021-present) | 0.0% |
| The Bishop of Chester | Bishop | (2001-2019) | 5.7% |
| The Bishop of Chichester | Bishop | (1978-2001) | 0.0% |
| The Bishop of Chichester | Bishop | (2008-2012) | 0.0% |
| The Bishop of Chichester | Bishop | (2018-present) | 11.1% |
| Lord Chidgey | LDem | (2005-2022) | 1.1% |
| Lord Chilver | Con | (1987-2012) | 0.0% |
| Baroness Chisholm of Owlpen | Con | (2014-present) | 0.3% |
| Lord Chitnis | Crossbench | (1977-2013) | n/a |
| The Marquess of Cholmondeley | Crossbench | (1990-2010) | n/a |
| The Marquess of Cholmondeley | Non-affiliated | (2010-2022) | n/a |
| Lord Chorley | Crossbench | (2001-2014) | 20.2% |
| Lord Choudrey | Con | (2019-present) | 0.0% |
| Lord Christopher | Lab | (1998-present) | 0.3% |
| The Earl of Clancarty | Crossbench | (2010-present) | 21.2% |
| Baroness Clark of Calton | Judge | (2005-present) | 6.6% |
| Lord Clarke of Hampstead | Lab | (1998-present) | 2.6% |
| Lord Clarke of Nottingham | Con | (2020-present) | 10.9% |
| Lord Clarke of Stone-cum-Ebony | Judge | (2009-2020) | 0.0% |
| Lord Clark of Kempston | Con | (1992-2004) | 0.0% |
| Baroness Clark of Kilwinning | Lab | (2020-present) | 1.8% |
| Lord Clark of Windermere | Lab | (2001-present) | 0.9% |
| Lord Cledwyn of Penrhos | Lab | (1979-2001) | 4.4% |
| Lord Clement-Jones | LDem | (1998-present) | 1.3% |
| Lord Clinton-Davis | Lab | (1990-2018) | 1.8% |
| Lord Clyde | Crossbench | (1996-2009) | 0.0% |
| Lord Coaker | Lab | (2021-present) | 0.2% |
| Lord Cobbold | Crossbench | (1987-2014) | 17.9% |
| Lord Cockfield | Con | (1978-2007) | 3.8% |
| Lord Cocks of Hartcliffe | Lab | (1987-2001) | 5.8% |
| Lord Coe | Con | (2000-2022) | 0.7% |
| Lord Coggan | Crossbench | (1980-2000) | n/a |
| Baroness Cohen of Pimlico | Lab | (2000-present) | 2.2% |
| Lord Colgrain | Con | (2017-present) | 0.0% |
| Lord Collins of Highbury | Lab | (2011-present) | 0.2% |
| Lord Collins of Mapesbury | Judge | (2009-present) | 0.0% |
| Viscount Colville of Culross | Crossbench | (1945-2010) | 20.7% |
| Viscount Colville of Culross | Crossbench | (2011-present) | 25.6% |
| Lord Colwyn | Con | (1966-2022) | 1.2% |
| Lord Condon | Crossbench | (2001-2017) | 22.9% |
| Lord Constantine of Stanmore | Con | (1981-2004) | n/a |
| Lord Cooke of Islandreagh | Crossbench | (1992-2007) | 21.2% |
| Lord Cooke of Thorndon | Crossbench | (1996-2006) | 40.0% |
| Lord Cooper of Windrush | Con | (2014-2019) | 14.6% |
| Lord Cooper of Windrush | Non-affiliated | (2019-present) | 15.4% |
| Lord Cope of Berkeley | Con | (1997-2020) | 1.1% |
| Lord Corbett of Castle Vale | Lab | (2001-2012) | 0.4% |
| The Earl of Cork and Orrery | Crossbench | (2016-present) | 30.5% |
| Lord Cormack | Con | (2010-2024) | 14.0% |
| Baroness Corston | Lab | (2005-2024) | 0.6% |
| Lord Cotter | LDem | (2006-2023) | 3.2% |
| The Earl of Courtown | Con | (1975-present) | 0.6% |
| Baroness Coussins | Crossbench | (2007-present) | 9.9% |
| Baroness Couttie | Con | (2016-2022) | 0.6% |
| The Bishop of Coventry | Bishop | (2003-2008) | 0.0% |
| The Bishop of Coventry | Bishop | (2013-2023) | 0.0% |
| Lord Cowdrey of Tonbridge | Con | (1997-2000) | 0.0% |
| Baroness Cox | Con | (1983-2004) | 0.6% |
| Baroness Cox | Crossbench | (2004-present) | 31.5% |
| Viscount Craigavon | Crossbench | (1974-present) | 35.4% |
| Lord Craig of Radley | Crossbench | (1991-present) | 30.0% |
| Lord Crathorne | Con | (1977-present) | 0.6% |
| The Earl of Crawford and Balcarres | Con | (1974-2019) | 2.6% |
| Baroness Crawley | Lab | (1998-present) | 0.3% |
| Lord Crickhowell | Con | (1987-2018) | 1.4% |
| Lord Crisp | Crossbench | (2006-present) | 15.0% |
| Lord Croham | Crossbench | (1978-2011) | 13.2% |
| Lord Cromwell | Crossbench | (2014-present) | 21.4% |
| Lord Cruddas | Con | (2021-present) | 0.2% |
| Lord Cryer | Lab | (2024-present) | 0.0% |
| Lord Cuckney | Con | (1995-2008) | 0.7% |
| Lord Cullen of Whitekirk | Crossbench | (2003-2019) | 0.0% |
| Baroness Cumberlege | Con | (1990-present) | 2.6% |
| Lord Cunningham of Felling | Lab | (2005-present) | 0.4% |
| Lord Currie of Marylebone | Crossbench | (1996-present) | 46.4% |
| Lord Curry of Kirkharle | Crossbench | (2011-present) | 38.5% |
| Baroness D'Souza | Crossbench | (2004-2011) | 19.2% |
| Baroness D'Souza | Crossbench | (2016-present) | 10.7% |
| Baroness D'Souza | Non-affiliated | (2011-2016) | n/a |
| Lord Dacre of Glanton | Con | (1979-2003) | 2.6% |
| Lord Dahrendorf | Crossbench | (2004-2009) | 24.1% |
| Lord Dahrendorf | LDem | (1993-2004) | 8.3% |
| Lord Dannatt | Crossbench | (2011-present) | 51.1% |
| Baroness Darcy de Knayth | Crossbench | (1943-2008) | 16.4% |
| Lord Darling of Roulanish | Lab | (2015-2020) | 0.0% |
| Lord Darroch of Kew | Crossbench | (2019-present) | n/a |
| Lord Darzi of Denham | Lab | (2007-2019) | 0.8% |
| Lord Darzi of Denham | Non-affiliated | (2019-present) | n/a |
| Baroness David | Lab | (1978-2009) | 1.5% |
| Lord Davidson of Glen Clova | Lab | (2006-present) | 0.7% |
| Baroness Davidson of Lundin Links | Con | (2021-present) | 4.3% |
| Lord Davies of Abersoch | Lab | (2009-2016) | 0.0% |
| Lord Davies of Abersoch | Non-affiliated | (2016-present) | 0.0% |
| Lord Davies of Brixton | Lab | (2020-present) | 0.4% |
| Lord Davies of Coity | Lab | (1997-2019) | 2.5% |
| Lord Davies of Gower | Con | (2019-present) | 0.9% |
| Lord Davies of Oldham | Lab | (1997-2024) | 0.7% |
| Lord Davies of Stamford | Lab | (2010-2023) | 1.3% |
| Lord de Clifford | Crossbench | (2023-present) | 19.5% |
| Lord de Mauley | Con | (2005-present) | 0.5% |
| Lord Dean of Harptree | Con | (1993-2009) | 0.8% |
| Baroness Dean of Thornton-le-Fylde | Lab | (1993-2018) | 0.6% |
| Lord Dear | Crossbench | (2006-present) | 30.9% |
| Lord Dearing | Crossbench | (1999-2002) | n/a |
| Lord Dearing | Crossbench | (2004-2009) | n/a |
| Lord Dearing | Other | (1998-1999) | n/a |
| Lord Dearing | Other | (2002-2004) | n/a |
| Lord Deben | Con | (2010-present) | 18.3% |
| Baroness Deech | Crossbench | (2005-present) | 43.0% |
| Lord Deedes | Con | (1986-2007) | 1.1% |
| Lord Deighton | Con | (2012-present) | 0.4% |
| Baroness Delacourt-Smith of Alteryn | Lab | (1974-2010) | n/a |
| Lord Denham | Con | (1948-2021) | 1.9% |
| Baroness Denton of Wakefield | Con | (1991-2001) | 0.0% |
| The Bishop of Derby | Bishop | (1999-2005) | 0.0% |
| The Bishop of Derby | Bishop | (2010-2018) | 0.0% |
| The Bishop of Derby | Bishop | (2019-present) | 0.0% |
| Lord Desai | Lab | (1991-2020) | 2.3% |
| Lord Desai | Non-affiliated | (2020-present) | 11.8% |
| The Earl of Devon | Crossbench | (2018-present) | 31.0% |
| Lord Dholakia | LDem | (1997-present) | 0.9% |
| Lord Diamond | Lab | (1970-2004) | 0.0% |
| Lord Dixon | Lab | (1997-2016) | 4.2% |
| Lord Dixon-Smith | Con | (1993-2023) | 0.9% |
| Lord Dobbs | Con | (2010-present) | 1.3% |
| Lord Dodds of Duncairn | DUP | (2020-present) | 5.1% |
| Baroness Donaghy | Lab | (2010-present) | 0.2% |
| Lord Donaldson of Lymington | Crossbench | (1988-2005) | 19.1% |
| Lord Donoughue | Lab | (1985-present) | 4.5% |
| Baroness Doocey | LDem | (2010-present) | 3.2% |
| Lord Dormand of Easington | Lab | (1987-2003) | 1.6% |
| Lord Douglas-Miller | Con | (2023-present) | 0.0% |
| Baroness Drake | Lab | (2010-present) | 0.3% |
| Lord Drayson | Lab | (2004-present) | 0.7% |
| Lord Dubs | Lab | (1994-present) | 1.0% |
| Lord Duncan of Springbank | Con | (2017-present) | 1.9% |
| The Earl of Dundee | Con | (1983-present) | 1.7% |
| Lord Dunlop | Con | (2015-present) | 0.4% |
| Baroness Dunn | Crossbench | (1990-2010) | 0.0% |
| The Bishop of Durham | Bishop | (1994-2003) | 15.4% |
| The Bishop of Durham | Bishop | (2003-2010) | 14.3% |
| The Bishop of Durham | Bishop | (2012-2013) | 7.7% |
| The Bishop of Durham | Bishop | (2014-2024) | 0.0% |
| Lord Dykes | Crossbench | (2016-present) | 16.7% |
| Lord Dykes | LDem | (2004-2015) | 2.8% |
| Lord Dykes | Non-affiliated | (2015-2016) | 14.8% |
| Lord Eames | Crossbench | (1995-present) | 27.2% |
| Baroness Eaton | Con | (2010-present) | 1.7% |
| Lord Eatwell | Lab | (1992-2014) | 0.5% |
| Lord Eatwell | Lab | (2020-present) | 0.3% |
| Lord Eatwell | Non-affiliated | (2014-2020) | 3.7% |
| Viscount Eccles | Con | (2005-present) | 1.1% |
| Baroness Eccles of Moulton | Con | (1990-present) | 0.5% |
| Lord Eden of Winton | Con | (1983-2015) | 1.3% |
| Lord Edmiston | Con | (2011-2015) | 1.8% |
| The Earl of Effingham | Con | (2022-present) | 0.3% |
| Lord Elder | Lab | (1999-2023) | 0.7% |
| Lord Elis-Thomas | Crossbench | (1992-2012) | 31.4% |
| Lord Elis-Thomas | Non-affiliated | (2016-present) | 3.1% |
| Lord Elis-Thomas | PC | (2012-2016) | 0.0% |
| Baroness Elles | Con | (1972-2009) | 0.7% |
| Lord Elliott of Ballinamallard | UUP | (2024-present) | 0.0% |
| Lord Elliott of Mickle Fell | Con | (2024-present) | 0.0% |
| Lord Elliott of Morpeth | Con | (1985-2011) | 0.8% |
| Lord Elton | Con | (1973-2020) | 1.7% |
| The Bishop of Ely | Bishop | (2007-2010) | n/a |
| The Bishop of Ely | Bishop | (2014-2023) | 0.0% |
| Lord Elystan-Morgan | Crossbench | (1981-2020) | 35.8% |
| Baroness Emerton | Crossbench | (1997-2019) | 15.0% |
| Lord Empey | UUP | (2011-present) | 0.0% |
| Lord Emslie | Crossbench | (1980-2002) | n/a |
| The Earl of Erroll | Crossbench | (1978-present) | 34.9% |
| Lord Erroll of Hale | Con | (1965-2000) | n/a |
| Lord Etherton | Crossbench | (2020-present) | 7.7% |
| Baroness Evans of Bowes Park | Con | (2014-present) | 0.2% |
| Lord Evans of Parkside | Lab | (1997-2015) | 2.4% |
| Lord Evans of Rainow | Con | (2022-present) | 0.6% |
| Lord Evans of Temple Guiting | Lab | (2000-2016) | 1.1% |
| Lord Evans of Watford | Lab | (1998-present) | 0.3% |
| Lord Evans of Weardale | Crossbench | (2014-present) | 35.7% |
| Lord Ewing of Kirkford | Lab | (1992-2007) | 0.0% |
| The Bishop of Exeter | Bishop | (2005-2013) | 3.2% |
| The Bishop of Exeter | Bishop | (2021-2023) | 0.0% |
| Lord Ezra | LDem | (1983-2015) | 0.3% |
| Lord Fairfax of Cameron | Con | (2015-present) | 1.4% |
| Baroness Fairhead | Con | (2017-present) | 9.7% |
| Lord Falconer of Thoroton | Lab | (1997-present) | 0.4% |
| Baroness Falkender | Lab | (1974-2019) | 3.5% |
| Viscount Falkland | Crossbench | (2011-2023) | 27.9% |
| Viscount Falkland | LDem | (1984-2011) | 5.4% |
| Baroness Falkner of Margravine | Crossbench | (2020-present) | 31.8% |
| Baroness Falkner of Margravine | LDem | (2004-2019) | 3.5% |
| Baroness Falkner of Margravine | Non-affiliated | (2019-2020) | 45.8% |
| Baroness Fall | Con | (2015-present) | 0.5% |
| Lord Fanshawe of Richmond | Con | (1983-2001) | n/a |
| Lord Farmer | Con | (2014-present) | 1.9% |
| Baroness Farrington of Ribbleton | Lab | (1994-2018) | 0.6% |
| Lord Faulkner of Worcester | Lab | (1999-present) | 1.3% |
| Lord Faulks | Con | (2010-2019) | 0.3% |
| Lord Faulks | Non-affiliated | (2019-present) | 64.8% |
| Lord Fearn | LDem | (2001-2018) | 3.6% |
| Baroness Featherstone | LDem | (2015-present) | 0.1% |
| Lord Feldman | Con | (1996-2017) | 0.4% |
| Lord Feldman of Elstree | Con | (2010-present) | 0.0% |
| Lord Fellowes | Crossbench | (1999-2022) | 29.5% |
| Lord Fellowes of West Stafford | Con | (2011-present) | 0.0% |
| Earl Ferrers | Con | (1954-2012) | 0.9% |
| Lord Field of Birkenhead | Crossbench | (2020-2024) | 20.5% |
| Lord Field of Birkenhead | Non-affiliated | (2020-2020) | n/a |
| Lord Filkin | Lab | (1999-2013) | 0.8% |
| Lord Filkin | Lab | (2019-present) | 0.0% |
| Lord Filkin | Non-affiliated | (2013-2019) | 0.0% |
| Lord Fink | Con | (2011-present) | 0.1% |
| Lord Finkelstein | Con | (2013-present) | 5.8% |
| Baroness Finlay of Llandaff | Crossbench | (2001-present) | 16.9% |
| Baroness Finn | Con | (2015-present) | 0.0% |
| Baroness Fisher of Rednal | Lab | (1974-2005) | n/a |
| Lord Fitt | Independent Socialist | (1983-2005) | n/a |
| Baroness Flather | Con | (1990-1998) | n/a |
| Baroness Flather | Con | (1999-2008) | n/a |
| Baroness Flather | Crossbench | (1999-1999) | n/a |
| Baroness Flather | Crossbench | (2008-2024) | 63.6% |
| Baroness Fleet | Con | (2020-present) | 0.0% |
| Lord Flight | Con | (2011-present) | 3.2% |
| Lord Flowers | Crossbench | (1979-2010) | 50.0% |
| Baroness Fookes | Con | (1997-present) | 1.8% |
| Baroness Ford | Crossbench | (2016-present) | 2.2% |
| Baroness Ford | Lab | (2006-2009) | 0.0% |
| Baroness Ford | Lab | (2010-2013) | n/a |
| Baroness Ford | Non-affiliated | (2009-2010) | n/a |
| Baroness Ford | Non-affiliated | (2013-2016) | 0.0% |
| Lord Forsyth of Drumlean | Con | (1999-present) | 4.1% |
| Lord Forte | Con | (1982-2007) | n/a |
| Baroness Foster of Aghadrumsee | Non-affiliated | (2022-present) | 62.3% |
| Lord Foster of Bath | LDem | (2015-present) | 0.1% |
| Lord Foster of Bishop Auckland | Lab | (2005-2019) | 0.8% |
| Baroness Foster of Oxton | Con | (2021-present) | 2.0% |
| Lord Foster of Thames Bank | Crossbench | (1999-2010) | 0.0% |
| Lord Foulkes of Cumnock | Lab | (2005-present) | 0.7% |
| Lord Fowler | Con | (2001-2016) | 1.8% |
| Lord Fowler | Non-affiliated | (2016-present) | 63.1% |
| Lord Fox | LDem | (2014-present) | 0.1% |
| Baroness Fox of Buckley | Non-affiliated | (2020-present) | 52.9% |
| Lord Framlingham | Con | (2011-present) | 4.2% |
| Lord Fraser of Carmyllie | Con | (1989-2013) | 1.7% |
| Lord Fraser of Corriegarth | Con | (2016-2021) | 1.8% |
| Baroness Fraser of Craigmaddie | Con | (2021-present) | 0.6% |
| Lord Freeman | Con | (1997-2020) | 0.7% |
| Baroness Freeman of Steventon | Crossbench | (2024-present) | 13.5% |
| Lord Freud | Con | (2009-present) | 1.0% |
| Lord Freyberg | Crossbench | (1993-present) | 15.7% |
| Baroness Fritchie | Crossbench | (2005-2024) | 14.1% |
| Lord Frost | Con | (2020-present) | 0.5% |
| Baroness Fullbrook | Con | (2020-present) | 0.6% |
| Lord Fuller | Con | (2024-present) | 0.8% |
| Lord Fyfe of Fairfield | Lab | (2000-2011) | 1.8% |
| Lord Gadhia | Con | (2016-2017) | 0.0% |
| Lord Gadhia | Non-affiliated | (2017-present) | 66.2% |
| Baroness Gale | Lab | (1999-present) | 1.0% |
| Lord Gallacher | Lab | (1983-2004) | n/a |
| Lord Garden | LDem | (2004-2007) | 0.6% |
| Baroness Garden of Frognal | LDem | (2007-present) | 0.9% |
| Lord Gardiner of Kimble | Con | (2010-present) | 0.5% |
| Baroness Gardner of Parkes | Con | (1981-2024) | 2.4% |
| Lord Garel-Jones | Con | (1997-2020) | 6.2% |
| Lord Garnier | Con | (2018-present) | 4.7% |
| Lord Gascoigne | Con | (2023-present) | 1.2% |
| Lord Gavron | Lab | (1999-2015) | 1.7% |
| Lord Geddes | Con | (1975-present) | 0.5% |
| Lord Geidt | Crossbench | (2017-present) | 36.5% |
| Lord George | Crossbench | (2004-2009) | n/a |
| Lord Geraint | LDem | (1992-2004) | 3.8% |
| Lord German | LDem | (2010-present) | 0.4% |
| Lord Gibson | Crossbench | (1975-2004) | 0.0% |
| Lord Gibson-Watt | Con | (1979-2002) | n/a |
| Baroness Gibson of Market Rasen | Lab | (2000-2018) | 1.0% |
| Lord Giddens | Lab | (2004-present) | 0.6% |
| Lord Gilbert | Lab | (1997-2013) | 3.2% |
| Lord Gilbert of Panteg | Con | (2015-present) | 0.6% |
| Lord Gilmour of Craigmillar | Con | (1992-2007) | 4.9% |
| Lord Gladwin of Clee | Lab | (1994-2003) | 0.0% |
| The Earl of Glasgow | LDem | (2005-present) | 1.9% |
| Lord Glasman | Lab | (2011-present) | 0.7% |
| Lord Glenamara | Lab | (1977-2012) | n/a |
| Lord Glenarthur | Con | (1976-present) | 3.5% |
| Lord Glendonbrook | Con | (2011-present) | 0.4% |
| Lord Glentoran | Con | (1995-2018) | 0.7% |
| The Bishop of Gloucester | Bishop | (1998-2003) | 0.0% |
| The Bishop of Gloucester | Bishop | (2009-2014) | 0.0% |
| The Bishop of Gloucester | Bishop | (2015-present) | 0.0% |
| Lord Goddard of Stockport | LDem | (2014-present) | 0.4% |
| Lord Godson | Con | (2021-present) | 0.2% |
| Lord Goff of Chieveley | Crossbench | (1986-2016) | 0.0% |
| Baroness Gohir | Crossbench | (2022-present) | 4.0% |
| Lord Gold | Con | (2011-present) | 1.3% |
| Baroness Goldie | Con | (2013-present) | 0.1% |
| Baroness Golding | Lab | (2001-present) | 1.4% |
| Lord Goldsmith | Lab | (1999-present) | 0.2% |
| Lord Goldsmith of Richmond Park | Con | (2020-present) | 0.0% |
| Lord Goodhart | LDem | (1997-2015) | 2.8% |
| Lord Goodlad | Con | (2005-2024) | 1.0% |
| Lord Goodman of Wycombe | Con | (2024-present) | 0.0% |
| Lord Gordon of Strathblane | Lab | (1997-2020) | 2.9% |
| Viscount Goschen | Con | (1977-present) | 0.7% |
| Baroness Goudie | Lab | (1998-present) | 0.3% |
| Lord Gould of Brookwood | Lab | (2004-2011) | 0.4% |
| Baroness Gould of Potternewton | Lab | (1993-2019) | 0.6% |
| Lord Grabiner | Crossbench | (2016-present) | 33.3% |
| Lord Grabiner | Lab | (1999-2015) | 1.6% |
| Lord Grabiner | Non-affiliated | (2015-2016) | 100.0% |
| Lord Grade of Yarmouth | Con | (2011-present) | 1.3% |
| Lord Graham of Edmonton | Lab | (1983-2020) | 1.7% |
| Lord Grantchester | Lab | (2003-present) | 1.0% |
| Lord Gray of Contin | Con | (1983-2006) | 2.9% |
| Lord Grayling | Con | (2024-present) | 0.0% |
| Lord Greaves | LDem | (2000-2021) | 4.3% |
| Lord Green of Deddington | Crossbench | (2014-present) | 62.3% |
| Lord Greene of Harrow Weald | Lab | (1975-2004) | n/a |
| Baroness Greenfield | Crossbench | (2001-present) | 31.3% |
| Baroness Greengross | Crossbench | (2000-2022) | 30.2% |
| Lord Greenhalgh | Con | (2020-present) | 0.0% |
| Lord Greenhill of Harrow | Crossbench | (1974-2000) | n/a |
| Lord Green of Hurstpierpoint | Con | (2010-2019) | 6.1% |
| Lord Green of Hurstpierpoint | Crossbench | (2021-present) | 16.5% |
| Lord Green of Hurstpierpoint | Non-affiliated | (2019-2021) | 14.9% |
| Lord Greenway | Crossbench | (1975-present) | 39.8% |
| Lord Gregson | Lab | (1975-2009) | 0.0% |
| Baroness Grender | LDem | (2013-present) | 0.1% |
| Lord Grenfell | Lab | (2000-2002) | 0.6% |
| Lord Grenfell | Lab | (2010-2014) | n/a |
| Lord Grenfell | Non-affiliated | (2002-2010) | n/a |
| Baroness Grey-Thompson | Crossbench | (2010-present) | 15.3% |
| Lord Griffiths | Crossbench | (1985-2015) | 0.0% |
| Lord Griffiths of Burry Port | Lab | (2004-present) | 0.8% |
| Lord Griffiths of Fforestfach | Con | (1991-present) | 1.5% |
| Lord Grimstone of Boscobel | Con | (2020-present) | 0.0% |
| Lord Grocott | Lab | (2001-present) | 0.4% |
| The Bishop of Guildford | Bishop | (2010-2013) | 16.7% |
| The Bishop of Guildford | Bishop | (1999-2003) | 10.3% |
| The Bishop of Guildford | Bishop | (2021-present) | 0.0% |
| Baroness Gustafsson | Lab | (2024-present) | 0.0% |
| Lord Guthrie of Craigiebank | Crossbench | (2001-2020) | 38.7% |
| Lord Habgood | Crossbench | (1995-2011) | 12.5% |
| Lord Hacking | Lab | (2021-present) | 0.6% |
| Lord Hague of Richmond | Con | (2015-present) | 0.9% |
| Viscount Hailsham | Con | (2015-present) | 17.8% |
| Lord Hailsham of Saint Marylebone | Con | (1970-2001) | n/a |
| Lord Hailsham of Saint Marylebone | Non-affiliated | (2001-2001) | n/a |
| Lord Hain | Lab | (2015-present) | 0.2% |
| Baroness Hale of Richmond | Judge | (2004-present) | 0.0% |
| Lord Hall of Birkenhead | Crossbench | (2010-present) | 14.4% |
| Baroness Hallett | Crossbench | (2019-present) | 26.3% |
| Lord Hambro | Con | (1994-2002) | 0.0% |
| Lord Hameed | Crossbench | (2007-present) | 36.4% |
| Lord Hamilton of Epsom | Con | (2005-present) | 2.3% |
| Lord Hamlyn | Lab | (1998-2001) | n/a |
| Lord Hammond of Runnymede | Con | (2020-present) | 0.0% |
| Lord Hampton | Crossbench | (2022-present) | 13.4% |
| Baroness Hamwee | LDem | (1991-present) | 1.2% |
| Baroness Hanham | Con | (1999-2020) | 1.0% |
| Lord Hannan of Kingsclere | Con | (2021-present) | 1.5% |
| Lord Hannay of Chiswick | Crossbench | (2001-present) | 15.7% |
| Lord Hannett of Everton | Lab | (2024-present) | 0.0% |
| Lord Hanningfield | Con | (1998-2010) | 0.3% |
| Lord Hanningfield | Non-affiliated | (2010-2024) | 100.0% |
| Lord Hanson | Con | (1983-2004) | 0.0% |
| Lord Hanson of Flint | Lab | (2024-present) | 0.0% |
| Viscount Hanworth | Lab | (2011-present) | 0.5% |
| Lord Hardie | Judge | (1997-present) | 7.9% |
| Baroness Harding of Winscombe | Con | (2014-present) | 2.6% |
| Lord Hardy of Wath | Lab | (1997-2003) | 1.3% |
| Lord Harlech | Con | (2021-present) | 0.5% |
| Baroness Harman | Lab | (2024-present) | 0.0% |
| Lord Harmar-Nicholls | Con | (1975-2000) | 0.0% |
| Lord Harries of Pentregarth | Crossbench | (2006-present) | 17.6% |
| Lord Harrington of Watford | Con | (2022-present) | 0.0% |
| Lord Harris of Greenwich | LDem | (1974-2001) | 0.7% |
| Lord Harris of Haringey | Lab | (1998-present) | 0.5% |
| Lord Harris of High Cross | Crossbench | (1979-2006) | 16.0% |
| Lord Harrison | Lab | (1999-2022) | 0.6% |
| Lord Harris of Peckham | Con | (1996-present) | 0.7% |
| Baroness Harris of Richmond | LDem | (1999-present) | 1.7% |
| Lord Hart of Chilton | Lab | (2004-2017) | 0.1% |
| Lord Hartwell | Crossbench | (1968-2001) | n/a |
| Lord Haselhurst | Con | (2018-present) | 1.7% |
| Lord Haskel | Lab | (1993-present) | 0.6% |
| Lord Haskins | Crossbench | (2005-2020) | 33.0% |
| Lord Haskins | Lab | (1998-2005) | 9.3% |
| Lord Haslam | Con | (1990-2002) | 0.0% |
| Lord Hastings of Scarisbrick | Crossbench | (2005-present) | 23.1% |
| Lord Hattersley | Lab | (1997-2017) | 6.3% |
| Lord Haughey | Lab | (2013-present) | 0.7% |
| Lord Haworth | Lab | (2004-2023) | 0.7% |
| Lord Hay of Ballyore | DUP | (2015-present) | 1.3% |
| Lord Hayhoe | Con | (1992-2013) | 1.2% |
| Baroness Hayman | Crossbench | (2011-present) | 12.3% |
| Baroness Hayman | Lab | (1996-2006) | 1.5% |
| Baroness Hayman | Non-affiliated | (2006-2011) | n/a |
| Baroness Hayman of Ullock | Lab | (2020-present) | 0.2% |
| Baroness Hayter of Kentish Town | Lab | (2010-present) | 0.3% |
| Lord Hayward | Con | (2015-present) | 1.4% |
| Baroness Hazarika | Lab | (2024-present) | 0.0% |
| Lord Healey | Lab | (1992-2015) | 0.0% |
| Baroness Healy of Primrose Hill | Lab | (2010-present) | 0.4% |
| Baroness Helic | Con | (2014-present) | 1.7% |
| Lord Henderson of Brompton | Crossbench | (1984-2000) | n/a |
| Lord Hendy | Lab | (2019-present) | 0.4% |
| Lord Hendy of Richmond Hill | Crossbench | (2022-present) | 34.8% |
| Baroness Henig | Lab | (2004-2024) | 0.7% |
| Lord Henley | Con | (1977-present) | 1.1% |
| Lord Hennessy of Nympsfield | Crossbench | (2010-present) | 15.7% |
| Lord Herbert of South Downs | Con | (2020-present) | 0.8% |
| The Bishop of Hereford | Bishop | (1997-2003) | 1.8% |
| The Bishop of Hereford | Bishop | (2009-2013) | 2.1% |
| The Bishop of Hereford | Bishop | (2023-present) | 0.0% |
| Lord Hermer | Lab | (2024-present) | 0.0% |
| Lord Heseltine | Con | (2001-2019) | 29.2% |
| Lord Heseltine | Non-affiliated | (2019-present) | 6.7% |
| Baroness Heyhoe Flint | Con | (2011-2017) | 0.6% |
| Lord Higgins | Con | (1997-2019) | 2.1% |
| Lord Hill-Norton | Crossbench | (1979-2004) | n/a |
| Lord Hill of Oareford | Con | (2010-present) | 0.5% |
| Baroness Hilton of Eggardon | Lab | (1991-2021) | 1.0% |
| Lord Hintze | Con | (2022-present) | 0.0% |
| Lord Hobhouse of Woodborough | Crossbench | (1998-2004) | n/a |
| Baroness Hodge of Barking | Lab | (2024-present) | 0.0% |
| Baroness Hodgson of Abinger | Con | (2013-present) | 2.0% |
| Lord Hodgson of Astley Abbotts | Con | (2000-present) | 2.7% |
| Baroness Hoey | Non-affiliated | (2020-present) | 62.9% |
| Lord Hoffmann | Crossbench | (1995-present) | 13.6% |
| Lord Hogan-Howe | Crossbench | (2017-present) | 57.6% |
| Baroness Hogg | Con | (1995-2010) | 2.4% |
| Baroness Hogg | Crossbench | (2010-present) | 62.9% |
| Lord Hogg of Cumbernauld | Lab | (1997-2008) | 1.9% |
| Lord Holderness | Con | (1979-2002) | 0.0% |
| Lord Hollick | Lab | (1991-present) | 1.6% |
| Baroness Hollins | Crossbench | (2010-present) | 17.2% |
| Baroness Hollis of Heigham | Lab | (1990-2018) | 0.3% |
| Lord Holme of Cheltenham | LDem | (1990-2008) | 1.9% |
| Lord Holmes of Richmond | Con | (2013-2019) | 1.6% |
| Lord Holmes of Richmond | Con | (2020-present) | 0.7% |
| Lord Holmes of Richmond | Non-affiliated | (2019-2020) | 75.0% |
| The Earl of Home | Con | (1995-2022) | 0.0% |
| Baroness Hooper | Con | (1985-present) | 2.1% |
| Lord Hooson | LDem | (1979-2012) | 3.5% |
| Lord Hope of Craighead | Judge | (1995-present) | 2.5% |
| Lord Hope of Thornes | Crossbench | (2005-2015) | n/a |
| Lord Horam | Con | (2013-present) | 2.0% |
| Lord Houchen of High Leven | Con | (2023-present) | 0.0% |
| Lord Houghton of Richmond | Crossbench | (2017-present) | 25.0% |
| Lord Howard of Lympne | Con | (2010-present) | 1.7% |
| Lord Howard of Rising | Con | (2004-present) | 2.2% |
| Baroness Howarth of Breckland | Crossbench | (2001-present) | 31.5% |
| Lord Howarth of Newport | Lab | (2005-present) | 1.1% |
| Earl Howe | Con | (1984-present) | 0.6% |
| Lord Howe of Aberavon | Con | (1992-2015) | 3.7% |
| Baroness Howe of Idlicote | Crossbench | (2001-2020) | 14.9% |
| Lord Howell of Guildford | Con | (1997-present) | 0.6% |
| Baroness Howells of St Davids | Lab | (1999-2019) | 0.9% |
| Lord Howie of Troon | Lab | (1978-2018) | 4.2% |
| Lord Hoyle | Lab | (1997-2023) | 1.5% |
| Lord Hughes | Lab | (1961-1999) | n/a |
| Baroness Hughes of Stretford | Lab | (2010-present) | 1.0% |
| Lord Hughes of Woodside | Lab | (1997-2022) | 0.7% |
| Baroness Humphreys | LDem | (2013-present) | 0.3% |
| Baroness Hunt of Bethnal Green | Crossbench | (2019-present) | 7.9% |
| Lord Hunt of Chesterton | Lab | (2000-2021) | 1.2% |
| Lord Hunt of Kings Heath | Lab | (1997-present) | 0.7% |
| Lord Hunt of Tanworth | Crossbench | (1980-2008) | 25.0% |
| Lord Hunt of Wirral | Con | (1997-present) | 0.7% |
| Lord Hurd of Westwell | Con | (1997-2016) | 5.0% |
| Lord Hussain | LDem | (2011-2015) | 4.7% |
| Lord Hussain | LDem | (2015-present) | 0.5% |
| Lord Hussain | Non-affiliated | (2015-2015) | n/a |
| Baroness Hussein-Ece | LDem | (2010-present) | 1.2% |
| Lord Hussey of North Bradley | Crossbench | (1996-2006) | 19.6% |
| Lord Hutchinson of Lullington | LDem | (1978-2011) | 2.6% |
| Lord Hutton | Crossbench | (1997-2018) | 8.3% |
| Lord Hutton of Furness | Lab | (2010-present) | 0.4% |
| Lord Hylton | Crossbench | (1967-2023) | 21.3% |
| Baroness Hylton-Foster | Crossbench | (1965-2002) | 16.1% |
| Lord Imbert | Crossbench | (1999-2017) | 37.2% |
| Lord Inge | Crossbench | (1997-2016) | 26.7% |
| Lord Inglewood | Con | (1989-2018) | 3.6% |
| Lord Inglewood | Non-affiliated | (2018-present) | 21.8% |
| Lord Ingrow | Other | (1983-2002) | n/a |
| Lord Irvine of Lairg | Lab | (1987-present) | 1.2% |
| Lord Islwyn | Lab | (1997-2003) | 4.4% |
| Lord Jackson of Peterborough | Con | (2022-present) | 0.4% |
| Lord Jacobs | LDem | (1997-2008) | 0.4% |
| Lord Jacobs | Non-affiliated | (2008-2014) | n/a |
| Lord James of Blackheath | Con | (2006-present) | 2.0% |
| Baroness James of Holland Park | Con | (1991-2014) | 0.5% |
| Lord Jamieson | Con | (2024-present) | 0.0% |
| Baroness Janke | LDem | (2014-present) | 0.4% |
| Lord Janner of Braunstone | Lab | (1997-2015) | 0.4% |
| Lord Janvrin | Crossbench | (2007-present) | 23.4% |
| Lord Jauncey of Tullichettle | Crossbench | (1988-2007) | 15.0% |
| Lord Jay of Ewelme | Crossbench | (2006-present) | 30.0% |
| Baroness Jay of Paddington | Lab | (1992-present) | 0.7% |
| Baroness Jeger | Lab | (1979-2007) | 4.3% |
| Earl Jellicoe | Con | (1935-2007) | 3.1% |
| Baroness Jenkin of Kennington | Con | (2011-present) | 0.4% |
| Lord Jenkin of Roding | Con | (1987-2015) | 1.3% |
| Lord Jenkins of Hillhead | LDem | (1987-2003) | 0.0% |
| Lord Jenkins of Putney | Lab | (1981-2004) | 2.3% |
| Lord Joffe | Crossbench | (2000-2007) | 35.5% |
| Lord Joffe | Lab | (2007-2015) | n/a |
| Lord Johnson of Lainston | Con | (2022-present) | 0.0% |
| Lord Johnson of Marylebone | Con | (2020-present) | 0.0% |
| Lord Johnston of Rockport | Con | (1987-2002) | 0.0% |
| Baroness Jolly | LDem | (2011-2024) | 0.4% |
| Lord Jones | Lab | (2001-present) | 0.7% |
| Lord Jones of Birmingham | Crossbench | (2008-2020) | 43.1% |
| Lord Jones of Birmingham | Lab | (2007-2008) | 0.0% |
| Lord Jones of Cheltenham | LDem | (2005-2022) | 0.6% |
| Baroness Jones of Moulsecoomb | Green | (2013-present) | 0.0% |
| Baroness Jones of Whitchurch | Lab | (2006-present) | 0.5% |
| Lord Jopling | Con | (1997-present) | 1.1% |
| Lord Jordan | Lab | (2000-present) | 1.3% |
| Baroness Jowell | Lab | (2015-2018) | 0.0% |
| Lord Judd | Lab | (1991-2021) | 3.4% |
| Lord Judge | Judge | (2008-2023) | 5.7% |
| Lord Kakkar | Crossbench | (2010-present) | 43.6% |
| Lord Kalms | Con | (2004-2009) | 0.0% |
| Lord Kalms | Non-affiliated | (2009-2024) | 70.2% |
| Lord Kamall | Con | (2021-present) | 0.9% |
| Baroness Keeley | Lab | (2024-present) | 1.2% |
| Lord Keen of Elie | Con | (2015-present) | 0.2% |
| Lord Keith of Castleacre | Con | (1980-2004) | 0.0% |
| Lord Keith of Kinkel | Crossbench | (1977-2002) | n/a |
| Lord Kelvedon | Con | (1997-2007) | 0.0% |
| Lord Kempsell | Con | (2023-present) | 0.9% |
| Baroness Kennedy of Cradley | Lab | (2013-2020) | 0.3% |
| Baroness Kennedy of Cradley | Non-affiliated | (2020-present) | 7.8% |
| Lord Kennedy of Southwark | Lab | (2010-present) | 0.4% |
| Baroness Kennedy of The Shaws | Lab | (1997-present) | 11.5% |
| Lord Kerr of Kinlochard | Crossbench | (2004-present) | 19.3% |
| Lord Kerr of Tonaghmore | Judge | (2009-2020) | n/a |
| Lord Kerslake | Crossbench | (2015-2023) | 11.6% |
| Lord Kestenbaum | Lab | (2011-present) | 0.0% |
| Lord Khan of Burnley | Lab | (2021-present) | 0.2% |
| Baroness Kidron | Crossbench | (2012-present) | 11.0% |
| Lord Kilclooney | Crossbench | (2001-present) | 41.1% |
| Lord Kilpatrick of Kincraig | Crossbench | (1996-2015) | n/a |
| Lord Kimball | Con | (1985-2014) | 0.3% |
| Baroness King of Bow | Lab | (2011-2024) | 0.3% |
| Lord King of Bridgwater | Con | (2001-present) | 1.3% |
| Lord King of Lothbury | Crossbench | (2013-present) | 70.6% |
| Lord Kingsdown | Crossbench | (1993-2013) | 22.6% |
| Lord Kingsland | Con | (1994-2009) | 0.8% |
| Baroness Kingsmill | Lab | (2006-present) | 0.2% |
| Lord King of Wartnaby | Con | (1983-2005) | 0.0% |
| Lord King of West Bromwich | Lab | (1999-2013) | 0.5% |
| Lord Kinnock | Lab | (2005-present) | 0.6% |
| Baroness Kinnock of Holyhead | Lab | (2009-2021) | 0.0% |
| The Earl of Kinnoull | Crossbench | (2015-2019) | 40.8% |
| The Earl of Kinnoull | Non-affiliated | (2019-present) | 31.6% |
| Lord Kirkham | Con | (1999-present) | 0.4% |
| Lord Kirkhill | Lab | (1975-2018) | 2.3% |
| Lord Kirkhope of Harrogate | Con | (2016-present) | 9.2% |
| Lord Kirkwood of Kirkhope | LDem | (2005-2020) | 2.5% |
| Baroness Knight of Collingtree | Con | (1997-2016) | 1.3% |
| Lord Knights | Crossbench | (1987-2014) | 0.0% |
| Lord Knight of Weymouth | Lab | (2010-present) | 0.5% |
| Baroness Kramer | LDem | (2011-present) | 0.4% |
| Lord Krebs | Crossbench | (2007-present) | 11.2% |
| Lord Laidlaw | Con | (2004-2010) | 3.0% |
| Lord Laing of Dunphail | Con | (1991-2010) | 0.7% |
| Baroness Laing of Elderslie | Con | (2024-present) | 0.0% |
| Lord Laird | Crossbench | (1999-2009) | n/a |
| Lord Laird | Non-affiliated | (2013-2018) | 13.0% |
| Lord Laird | UUP | (1999-1999) | n/a |
| Lord Laird | UUP | (2009-2013) | n/a |
| Lord Laming | Crossbench | (1998-present) | 33.1% |
| Lord Lamont of Lerwick | Con | (1998-present) | 1.6% |
| Baroness Lampard | Con | (2022-present) | 0.0% |
| Lord Lancaster of Kimbolton | Con | (2020-present) | 0.2% |
| Lord Lane | Crossbench | (1990-2005) | 0.0% |
| Baroness Lane-Fox of Soho | Crossbench | (2013-present) | 13.6% |
| Lord Lane of Horsell | Con | (1990-2009) | 0.8% |
| Lord Lang of Monkton | Con | (1997-2022) | 0.6% |
| Lord Lansley | Con | (2015-present) | 3.9% |
| Baroness Lawlor | Con | (2022-present) | 0.0% |
| Baroness Lawrence of Clarendon | Lab | (2013-present) | 0.4% |
| Lord Lawson of Blaby | Con | (1992-2022) | 3.2% |
| Lord Layard | Lab | (2000-present) | 0.8% |
| Lord Leach of Fairford | Con | (2006-2016) | 1.2% |
| Lord Lea of Crondall | Lab | (1999-2020) | 0.3% |
| Lord Lea of Crondall | Non-affiliated | (2020-2022) | 5.4% |
| Baroness Lea of Lymm | Con | (2022-present) | 0.0% |
| Lord Lebedev | Crossbench | (2020-present) | n/a |
| The Bishop of Leeds | Bishop | (2015-present) | 2.1% |
| Lord Lee of Trafford | LDem | (2006-present) | 1.2% |
| The Bishop of Leicester | Bishop | (2003-2015) | 0.0% |
| The Bishop of Leicester | Bishop | (2022-present) | n/a |
| The Earl of Leicester | Con | (2021-present) | 0.8% |
| Lord Leigh of Hurley | Con | (2013-present) | 0.6% |
| Lord Leitch | Lab | (2004-2024) | 1.0% |
| Lord Lennie | Lab | (2014-present) | 0.2% |
| Lord Leong | Lab | (2022-present) | 0.0% |
| Lord Lester of Herne Hill | LDem | (1993-2018) | 2.6% |
| Lord Lester of Herne Hill | Non-affiliated | (2018-2018) | n/a |
| Lord Levene of Portsoken | Crossbench | (1997-2024) | 20.0% |
| Lord Levy | Lab | (1997-present) | 0.2% |
| Lord Lewis of Newnham | Crossbench | (1989-2014) | 14.1% |
| Lord Lexden | Con | (2011-present) | 1.2% |
| The Bishop of Lichfield | Bishop | (1989-2003) | 0.0% |
| The Bishop of Lichfield | Bishop | (2009-2015) | 0.0% |
| The Bishop of Lichfield | Bishop | (2022-present) | 0.0% |
| Baroness Liddell of Coatdyke | Lab | (2010-present) | 0.6% |
| Lord Liddle | Lab | (2010-present) | 1.3% |
| Lord Lilley | Con | (2018-present) | 1.5% |
| The Bishop of Lincoln | Bishop | (1993-2001) | 0.0% |
| The Bishop of Lincoln | Bishop | (2008-2011) | 0.0% |
| The Bishop of Lincoln | Bishop | (2017-2021) | 2.8% |
| The Bishop of Lincoln | Bishop | (2023-present) | 0.0% |
| The Earl of Lindsay | Con | (1989-present) | 0.5% |
| Lord Lingfield | Con | (2010-present) | 0.2% |
| Baroness Linklater of Butterstone | LDem | (1997-2016) | 3.9% |
| Lord Lipsey | Lab | (1999-present) | 1.5% |
| Baroness Lister of Burtersett | Lab | (2011-present) | 0.3% |
| The Earl of Listowel | Crossbench | (1997-2022) | 17.0% |
| Lord Lisvane | Crossbench | (2015-present) | 5.0% |
| Lord Livermore | Lab | (2015-present) | 0.4% |
| The Bishop of Liverpool | Bishop | (2003-2013) | 2.6% |
| The Bishop of Liverpool | Bishop | (2021-2022) | n/a |
| The Earl of Liverpool | Con | (1969-present) | 2.5% |
| Lord Livingston of Parkhead | Con | (2013-present) | 6.6% |
| Lord Livsey of Talgarth | LDem | (2001-2010) | 1.5% |
| Lord Llewellyn of Steep | Con | (2016-present) | n/a |
| Lord Lloyd-Webber | Con | (1997-2017) | 19.0% |
| Lord Lloyd of Berwick | Crossbench | (1993-2015) | 20.3% |
| Baroness Lloyd of Highbury | Crossbench | (1996-2006) | n/a |
| Baroness Lockwood | Lab | (1978-2017) | 0.8% |
| Lord Lofthouse of Pontefract | Lab | (1997-2012) | 3.7% |
| Lord Londesborough | Crossbench | (2021-present) | 16.3% |
| The Bishop of London | Bishop | (1996-2017) | 0.0% |
| The Bishop of London | Bishop | (2018-present) | 0.0% |
| The Earl of Longford | Lab | (1961-2001) | 10.1% |
| Lord Loomba | Crossbench | (2017-present) | 26.8% |
| Lord Loomba | LDem | (2011-2016) | 1.4% |
| Lord Loomba | Non-affiliated | (2016-2017) | 15.6% |
| The Marquess of Lothian | Con | (2010-2024) | 1.3% |
| Lord Lovell-Davis | Lab | (1974-2001) | 0.0% |
| Lord Low of Dalston | Crossbench | (2006-present) | 23.2% |
| Lord Lucas | Con | (1991-present) | 3.7% |
| Lord Luce | Crossbench | (2000-2020) | 35.4% |
| Baroness Ludford | LDem | (1997-present) | 0.9% |
| Lord Luke | Con | (1996-2015) | 0.5% |
| Lord Lupton | Con | (2015-2019) | 0.5% |
| Lord Lupton | Non-affiliated | (2019-present) | 74.8% |
| Lord Lyell | Con | (1943-2017) | 1.4% |
| Lord Lyell of Markyate | Con | (2005-2010) | 2.2% |
| The Earl of Lytton | Crossbench | (2011-present) | 20.6% |
| Lord Macaulay of Bragar | Lab | (1989-2002) | n/a |
| Lord Macaulay of Bragar | Lab | (2005-2013) | n/a |
| Lord Macaulay of Bragar | Non-affiliated | (2013-2014) | n/a |
| Lord Macaulay of Bragar | Other | (2002-2005) | n/a |
| Lord Macdonald of River Glaven | Crossbench | (2019-present) | 4.5% |
| Lord Macdonald of River Glaven | LDem | (2010-2018) | 7.9% |
| Lord Macdonald of River Glaven | Non-affiliated | (2018-2019) | 0.0% |
| Lord Macdonald of Tradeston | Lab | (1998-2017) | 0.5% |
| Lord Macfarlane of Bearsden | Con | (1991-2016) | 2.0% |
| Lord MacGregor of Pulham Market | Con | (2001-2019) | 1.4% |
| Lord MacKay of Ardbrecknish | Crossbench | (1991-2001) | 18.0% |
| Lord Mackay of Clashfern | Con | (1979-2022) | 5.7% |
| Lord Mackay of Drumadoon | Judge | (1995-2017) | 0.0% |
| Lord Mackenzie-Stuart | Crossbench | (1988-2000) | n/a |
| Lord MacKenzie of Culkein | Lab | (1999-2024) | 0.9% |
| Lord Mackenzie of Framwellgate | Lab | (1998-2013) | 0.9% |
| Lord Mackenzie of Framwellgate | Non-affiliated | (2013-present) | 6.5% |
| Lord Mackie of Benshie | LDem | (1974-2015) | 3.7% |
| Lord Mackinlay of Richborough | Con | (2024-present) | 0.0% |
| Lord MacLaurin of Knebworth | Con | (1996-2017) | 0.9% |
| Lord MacLehose of Beoch | Crossbench | (1982-2000) | n/a |
| Lord Maclennan of Rogart | LDem | (2001-2020) | 4.6% |
| Baroness Macleod of Borve | Con | (1971-1999) | n/a |
| Lord Macpherson of Earl's Court | Crossbench | (2016-present) | 20.4% |
| Baroness Maddock | LDem | (1997-2020) | 0.7% |
| Lord Magan of Castletown | Con | (2011-present) | 0.7% |
| Lord Maginnis of Drumglass | Crossbench | (2002-2009) | n/a |
| Lord Maginnis of Drumglass | Independent Ulster Unionist | (2013-present) | n/a |
| Lord Maginnis of Drumglass | Non-affiliated | (2012-2013) | 0.0% |
| Lord Maginnis of Drumglass | UUP | (2001-2002) | 0.0% |
| Lord Maginnis of Drumglass | UUP | (2009-2012) | n/a |
| Lord Mair | Crossbench | (2016-present) | 12.3% |
| Baroness Mallalieu | Lab | (1991-present) | 9.0% |
| Lord Malloch-Brown | Crossbench | (2012-present) | 0.0% |
| Lord Malloch-Brown | Lab | (2007-2012) | 0.0% |
| Lord Malloch-Brown | Other | (2012-2012) | n/a |
| Lord Mance | Judge | (2005-present) | 0.0% |
| The Bishop of Manchester | Bishop | (1998-2002) | 0.0% |
| The Bishop of Manchester | Bishop | (2002-2013) | 5.1% |
| The Bishop of Manchester | Bishop | (2020-present) | 0.0% |
| Lord Mancroft | Con | (1987-present) | 1.7% |
| Lord Mandelson | Lab | (2008-present) | 0.4% |
| Lord Mann | Non-affiliated | (2019-present) | 15.5% |
| Baroness Manningham-Buller | Crossbench | (2008-present) | 19.1% |
| Baroness Manzoor | Con | (2016-present) | 0.3% |
| Baroness Manzoor | Crossbench | (2016-2016) | n/a |
| Baroness Manzoor | LDem | (2013-2016) | 2.0% |
| Lord Maples | Con | (2010-2012) | 1.3% |
| The Countess of Mar | Crossbench | (1975-2020) | 19.5% |
| The Earl of Mar and Kellie | LDem | (2000-2017) | 1.1% |
| Lord Markham | Con | (2022-present) | 0.3% |
| Lord Marks of Hale | Con | (2024-present) | 0.0% |
| Lord Marks of Henley-on-Thames | LDem | (2011-present) | 1.6% |
| Lord Marland | Con | (2006-present) | 0.9% |
| Lord Marlesford | Con | (1991-present) | 3.0% |
| Lord Marsh | Crossbench | (1981-2011) | 36.8% |
| Lord Marshall of Knightsbridge | Crossbench | (1998-2012) | 22.2% |
| Lord Martin of Springburn | Crossbench | (2009-2018) | 30.2% |
| Baroness Masham of Ilton | Crossbench | (1970-2023) | 18.6% |
| Lord Mason of Barnsley | Lab | (1987-2015) | 4.2% |
| Baroness Massey of Darwen | Lab | (1999-2024) | 0.7% |
| Lord Maude of Horsham | Con | (2015-present) | 0.0% |
| Lord Mawhinney | Con | (2005-2019) | 1.9% |
| Lord Mawson | Crossbench | (2007-present) | 40.7% |
| Lord Maxton | Lab | (2004-present) | 1.0% |
| Lord Mayhew of Twysden | Con | (1997-2015) | 1.6% |
| Baroness May of Maidenhead | Con | (2024-present) | 0.0% |
| Lord May of Oxford | Crossbench | (2001-2017) | 33.1% |
| Lord McAlpine of West Green | Con | (2003-2010) | n/a |
| Lord McAlpine of West Green | Other | (1984-2003) | n/a |
| Lord McAvoy | Lab | (2010-2024) | 1.2% |
| Lord McCarthy | Lab | (1976-2012) | 4.7% |
| Lord McCluskey | Crossbench | (1976-2017) | 33.3% |
| Lord McColl of Dulwich | Con | (1989-present) | 1.7% |
| Lord McConnell | Crossbench | (1995-2000) | 24.4% |
| Lord McConnell of Glenscorrodale | Lab | (2010-present) | 0.6% |
| Lord McCrea of Magherafelt and Cookstown | DUP | (2018-present) | 1.1% |
| Baroness McDonagh | Lab | (2004-2023) | 0.7% |
| Lord McDonald of Salford | Crossbench | (2021-present) | 28.0% |
| Lord McFall of Alcluith | Lab | (2010-2016) | 0.0% |
| Lord McFall of Alcluith | Non-affiliated | (2016-present) | 0.0% |
| Baroness McFarlane of Llandaff | Crossbench | (1979-2012) | 11.1% |
| Baroness McGregor-Smith | Con | (2015-present) | 0.9% |
| Lord McInnes of Kilwinning | Con | (2016-present) | 1.3% |
| Lord McIntosh of Haringey | Lab | (1983-2010) | 1.0% |
| Baroness McIntosh of Hudnall | Lab | (1999-present) | 0.7% |
| Baroness McIntosh of Pickering | Con | (2015-present) | 10.5% |
| Lord McKenzie of Luton | Lab | (2004-2021) | 0.6% |
| Lord McLoughlin | Con | (2020-present) | 1.3% |
| Lord McNally | LDem | (1995-present) | 1.2% |
| Lord McNicol of West Kilbride | Lab | (2018-present) | 0.1% |
| Baroness Meacher | Crossbench | (2006-present) | 19.1% |
| Lord Mendelsohn | Lab | (2013-present) | 0.4% |
| Lord Mendoza | Con | (2020-present) | 0.3% |
| Lord Merlyn-Rees | Lab | (1992-2006) | 0.0% |
| Baroness Merron | Lab | (2021-present) | 0.2% |
| Lord Meston | Crossbench | (2023-present) | 10.4% |
| Lord Methuen | LDem | (1994-2014) | 3.9% |
| Baroness Meyer | Con | (2018-present) | 1.5% |
| Baroness Michie of Gallanach | LDem | (2001-2008) | 0.0% |
| Baroness Miller of Chilthorne Domer | LDem | (1998-present) | 2.2% |
| Baroness Miller of Hendon | Con | (1993-2014) | 1.3% |
| Lord Millett | Crossbench | (1998-2017) | n/a |
| Lord Milner of Leeds | Lab | (1967-2003) | 0.8% |
| The Earl of Minto | Con | (2022-present) | 0.0% |
| Lord Mishcon | Lab | (1978-2006) | 5.0% |
| Lord Mitchell | Lab | (2000-present) | 1.5% |
| Baroness Mobarik | Con | (2014-present) | 1.7% |
| Lord Mogg | Crossbench | (2008-2019) | 6.7% |
| Lord Molloy | Lab | (1981-2001) | 2.3% |
| Lord Molyneaux of Killead | Crossbench | (1997-2015) | 29.5% |
| Baroness Monckton of Dallington Forest | Con | (2024-present) | 1.4% |
| Baroness Mone | Con | (2015-present) | 0.4% |
| Lord Monks | Lab | (2010-present) | 0.4% |
| Lord Monro of Langholm | Con | (1997-2006) | 0.5% |
| Lord Monson | Crossbench | (1958-2011) | 24.2% |
| Lord Montagu of Beaulieu | Con | (1947-2015) | 2.5% |
| Viscount Montgomery of Alamein | Crossbench | (2005-2015) | 28.3% |
| The Duke of Montrose | Con | (1992-present) | 0.9% |
| Lord Moonie | Lab | (2005-2019) | 2.4% |
| Lord Moonie | Non-affiliated | (2019-2022) | 0.0% |
| Lord Moore of Etchingham | Non-affiliated | (2020-present) | 72.2% |
| Lord Moore of Lower Marsh | Con | (1992-2019) | 1.1% |
| Lord Moore of Wolvercote | Crossbench | (1986-2009) | 18.2% |
| Lord Moran | Crossbench | (1977-2014) | 12.6% |
| Lord Morgan | Lab | (2000-present) | 4.0% |
| Baroness Morgan of Cotes | Con | (2020-present) | 1.3% |
| Baroness Morgan of Drefelin | Crossbench | (2011-present) | 16.9% |
| Baroness Morgan of Drefelin | Lab | (2004-2011) | 0.3% |
| Baroness Morgan of Ely | Lab | (2011-present) | 0.4% |
| Baroness Morgan of Huyton | Lab | (2001-present) | 0.3% |
| Lord Morris of Aberavon | Lab | (2001-2023) | 2.5% |
| Baroness Morris of Bolton | Con | (2004-present) | 0.5% |
| Lord Morris of Castle Morris | Lab | (1990-2001) | 0.8% |
| Lord Morris of Handsworth | Lab | (2006-2020) | 0.7% |
| Lord Morris of Manchester | Lab | (1997-2012) | 2.0% |
| Baroness Morrissey | Con | (2020-present) | 4.3% |
| Baroness Morris of Yardley | Lab | (2005-present) | 0.9% |
| Lord Morrow | DUP | (2006-present) | 0.4% |
| Lord Morse | Crossbench | (2021-present) | 40.0% |
| Lord Moser | Crossbench | (2001-2015) | 37.4% |
| Lord Mott | Con | (2023-present) | 0.0% |
| Lord Mountevans | Crossbench | (2015-present) | 31.3% |
| Lord Mowbray and Stourton | Con | (1965-2006) | 0.7% |
| Lord Moylan | Con | (2020-present) | 1.6% |
| Lord Moynihan | Con | (1997-present) | 1.8% |
| Lord Moynihan of Chelsea | Con | (2024-present) | 0.0% |
| Baroness Moyo | Con | (2022-present) | 0.0% |
| Lord Moyola | Con | (1971-2002) | n/a |
| Baroness Murphy | Crossbench | (2004-present) | 27.1% |
| Lord Murphy of Torfaen | Lab | (2015-present) | 0.7% |
| Lord Murray of Blidworth | Con | (2022-present) | 0.0% |
| Lord Murray of Epping Forest | Lab | (1985-2004) | 3.1% |
| Lord Murton of Lindisfarne | Con | (1979-2009) | 0.7% |
| Lord Mustill | Crossbench | (1992-2015) | n/a |
| Lord Myners | Crossbench | (2015-2022) | 9.1% |
| Lord Myners | Lab | (2008-2014) | 0.7% |
| Lord Myners | Non-affiliated | (2014-2015) | n/a |
| Lord Naseby | Con | (1997-present) | 1.5% |
| Lord Nash | Con | (2013-present) | 0.7% |
| Lord Neill of Bladen | Crossbench | (1997-2016) | 13.8% |
| Baroness Neuberger | Crossbench | (2011-present) | 5.4% |
| Baroness Neuberger | LDem | (2004-2011) | 1.3% |
| Lord Neuberger of Abbotsbury | Judge | (2007-present) | 12.5% |
| Baroness Neville-Jones | Con | (2007-present) | 2.7% |
| Baroness Neville-Rolfe | Con | (2013-present) | 1.0% |
| Lord Newby | LDem | (1997-present) | 0.8% |
| The Bishop of Newcastle | Bishop | (2002-2014) | 3.6% |
| The Bishop of Newcastle | Bishop | (2016-2021) | 6.7% |
| The Bishop of Newcastle | Bishop | (2023-present) | 0.0% |
| Baroness Newlove | Con | (2010-present) | 3.3% |
| Lord Newton of Braintree | Con | (1997-2012) | 4.9% |
| Lord Nicholls of Birkenhead | Crossbench | (1994-2017) | 0.0% |
| Baroness Nicholson of Winterbourne | Con | (2016-present) | 1.3% |
| Baroness Nicholson of Winterbourne | LDem | (1997-2016) | 8.5% |
| Baroness Nicholson of Winterbourne | Non-affiliated | (2016-2016) | n/a |
| Lord Nickson | Crossbench | (1994-2015) | 22.4% |
| Baroness Nicol | Lab | (1983-2018) | 0.6% |
| Baroness Noakes | Con | (2000-present) | 1.4% |
| Lord Nolan | Crossbench | (1994-2007) | 0.0% |
| Lord Noon | Lab | (2011-2015) | 0.8% |
| The Duke of Norfolk | Con | (1971-2002) | 0.0% |
| The Duke of Norfolk | Crossbench | (2003-2012) | 0.0% |
| The Duke of Norfolk | Non-affiliated | (2012-present) | 100.0% |
| The Duke of Norfolk | Other | (2003-2003) | n/a |
| Lord Northbourne | Crossbench | (1982-2018) | 24.2% |
| Lord Northbrook | Con | (1990-present) | 5.7% |
| The Earl of Northesk | Con | (1994-2010) | 0.3% |
| Lord Northfield | Lab | (1976-2013) | 0.0% |
| Baroness Northover | LDem | (2000-present) | 0.8% |
| Lord Norton of Louth | Con | (1998-present) | 3.8% |
| The Bishop of Norwich | Bishop | (2004-2019) | 5.9% |
| The Bishop of Norwich | Bishop | (2023-present) | 0.0% |
| Baroness Nye | Lab | (2010-present) | 0.2% |
| Baroness O'Cathain | Con | (1991-2021) | 1.9% |
| Lord O'Donnell | Crossbench | (2012-present) | 5.0% |
| Baroness O'Grady of Upper Holloway | Lab | (2022-present) | 0.0% |
| Baroness O'Loan | Crossbench | (2009-present) | 20.8% |
| Baroness O'Neill of Bengarve | Crossbench | (1999-present) | 16.9% |
| Baroness O'Neill of Bexley | Con | (2022-present) | 0.0% |
| Lord O'Neill of Clackmannan | Lab | (2005-2020) | 0.4% |
| Lord O'Neill of Gatley | Con | (2015-2016) | 0.0% |
| Lord O'Neill of Gatley | Crossbench | (2017-present) | 12.5% |
| Lord O'Neill of Gatley | Non-affiliated | (2016-2017) | n/a |
| Lord O'Shaughnessy | Con | (2015-present) | 0.2% |
| Lord Oakeshott of Seagrove Bay | LDem | (2000-2014) | 2.5% |
| Lord Oakeshott of Seagrove Bay | Non-affiliated | (2014-present) | 10.0% |
| Lord Oates | LDem | (2015-present) | 0.1% |
| Lord Offord of Garvel | Con | (2021-present) | 0.0% |
| Lord Oliver of Aylmerton | Crossbench | (1986-2007) | 0.0% |
| The Earl of Onslow | Con | (1971-2011) | 5.1% |
| Lord Onslow of Woking | Con | (1997-2001) | 0.0% |
| Baroness Oppenheim-Barnes | Con | (1989-2019) | 1.2% |
| Lord Orme | Lab | (1997-2005) | 4.7% |
| Baroness Osamor | Lab | (2018-present) | 1.5% |
| Lord Ouseley | Crossbench | (2001-2019) | 39.9% |
| Lord Owen | Crossbench | (1992-2014) | 45.3% |
| Lord Owen | Independent Social Democrat | (2014-2024) | n/a |
| Baroness Owen of Alderley Edge | Con | (2023-present) | 0.0% |
| Lord Oxburgh | Crossbench | (1999-2022) | 20.0% |
| The Bishop of Oxford | Bishop | (2010-2014) | 0.0% |
| The Bishop of Oxford | Bishop | (1993-2006) | 7.7% |
| The Bishop of Oxford | Bishop | (2016-present) | 3.2% |
| The Earl of Oxford and Asquith | LDem | (2014-2019) | 2.2% |
| The Earl of Oxford and Asquith | Non-affiliated | (2019-present) | n/a |
| Viscount Oxfuird | Con | (1986-2003) | 0.0% |
| Lord Paddick | LDem | (2013-present) | 0.5% |
| Baroness Paisley of St George's | DUP | (2006-2017) | 0.0% |
| Lord Palmer | Crossbench | (1990-2023) | 22.7% |
| Lord Palmer of Childs Hill | LDem | (2011-present) | 0.6% |
| Lord Palumbo | Con | (1991-2019) | 1.1% |
| Lord Palumbo of Southwark | LDem | (2013-present) | 8.3% |
| Lord Pannick | Crossbench | (2008-present) | 24.6% |
| Lord Parekh | Lab | (2000-present) | 2.7% |
| Lord Parker of Minsmere | Crossbench | (2021-present) | n/a |
| Lord Parkinson | Con | (1992-2015) | 1.0% |
| Lord Parkinson of Whitley Bay | Con | (2019-present) | 0.0% |
| Baroness Park of Monmouth | Con | (1990-2010) | 1.4% |
| Baroness Parminter | LDem | (2010-present) | 0.3% |
| Lord Parry | Lab | (1976-2004) | 0.0% |
| Lord Patel | Crossbench | (1999-present) | 32.4% |
| Lord Patel of Blackburn | Lab | (2000-2019) | 1.9% |
| Lord Patel of Bradford | Crossbench | (2006-2008) | 32.4% |
| Lord Patel of Bradford | Lab | (2008-2018) | 0.0% |
| Lord Patel of Bradford | Non-affiliated | (2018-present) | 4.0% |
| Lord Patten | Con | (1997-present) | 1.2% |
| Lord Patten of Barnes | Con | (2005-present) | 20.5% |
| Lord Paul | Lab | (1996-2010) | 0.6% |
| Lord Paul | Non-affiliated | (2010-present) | 3.7% |
| Lord Peach | Crossbench | (2022-present) | 47.6% |
| Lord Pearson of Rannoch | Con | (1990-2004) | 1.2% |
| Lord Pearson of Rannoch | Conservative Independent | (2004-2007) | n/a |
| Lord Pearson of Rannoch | Non-affiliated | (2019-present) | 65.0% |
| Lord Pearson of Rannoch | UKIP | (2007-2019) | 0.0% |
| Earl Peel | Con | (1973-2006) | 0.3% |
| Earl Peel | Crossbench | (2006-present) | 82.6% |
| Lord Pendry | Lab | (2001-2023) | 3.0% |
| Baroness Penn | Con | (2019-present) | 0.2% |
| Baroness Perry of Southwark | Con | (1991-2016) | 1.5% |
| Lord Perry of Walton | LDem | (1979-2003) | 9.8% |
| Lord Peston | Lab | (1987-2016) | 3.1% |
| The Bishop of Peterborough | Bishop | (2001-2009) | 0.0% |
| The Bishop of Peterborough | Bishop | (2014-2023) | 2.5% |
| The Bishop of Peterborough | Bishop | (2024-present) | n/a |
| Lord Petitgas | Con | (2024-present) | 0.0% |
| Lord Peyton of Yeovil | Con | (1983-2006) | 1.3% |
| Lord Phillips of Sudbury | LDem | (1998-2015) | 6.9% |
| Lord Phillips of Worth Matravers | Judge | (1999-present) | 2.6% |
| Lord Pickles | Con | (2018-present) | 0.8% |
| Baroness Pidding | Con | (2015-present) | 0.2% |
| Baroness Pidgeon | LDem | (2024-present) | 0.0% |
| Baroness Pike | Con | (1974-2004) | 0.0% |
| Lord Pilkington of Oxenford | Con | (1996-2011) | 2.0% |
| Baroness Pinnock | LDem | (2014-present) | 0.1% |
| Baroness Pitkeathley | Lab | (1997-present) | 0.4% |
| Lord Plant of Highfield | Lab | (1992-2024) | 2.8% |
| Baroness Platt of Writtle | Con | (1981-2015) | 0.7% |
| Lord Plowden | Crossbench | (1959-2001) | n/a |
| Lord Plumb | Con | (1987-2017) | 1.0% |
| Lord Plummer of St Marylebone | Con | (1981-2009) | 0.3% |
| Lord Polak | Con | (2015-present) | 2.0% |
| Lord Ponsonby of Shulbrede | Lab | (2000-present) | 0.8% |
| Lord Popat | Con | (2010-present) | 0.4% |
| Baroness Porter of Fulwood | Con | (2024-present) | 0.0% |
| Lord Porter of Luddenham | Crossbench | (1990-2002) | 11.1% |
| Lord Porter of Spalding | Con | (2015-present) | 0.8% |
| The Bishop of Portsmouth | Bishop | (1999-2009) | 2.4% |
| The Bishop of Portsmouth | Bishop | (2014-2021) | 9.1% |
| Lord Powell of Bayswater | Crossbench | (2000-present) | 55.9% |
| Baroness Prashar | Crossbench | (1999-present) | 14.6% |
| Lord Prentice | Con | (1992-2001) | 0.0% |
| Lord Prentis of Leeds | Lab | (2022-present) | 0.0% |
| Lord Prescott | Lab | (2010-2024) | 0.2% |
| Lord Price | Con | (2016-present) | 0.0% |
| Baroness Primarolo | Lab | (2015-present) | 0.2% |
| Lord Prior | Con | (1987-2016) | 9.0% |
| Lord Prior of Brampton | Con | (2015-2018) | 3.2% |
| Lord Prior of Brampton | Non-affiliated | (2018-present) | 50.0% |
| Baroness Prosser | Lab | (2004-present) | 0.6% |
| Lord Prys-Davies | Lab | (1983-2011) | 5.9% |
| Lord Prys-Davies | Non-affiliated | (2011-2015) | n/a |
| Lord Purvis of Tweed | LDem | (2013-present) | 0.3% |
| Lord Puttnam | Lab | (1997-2021) | 1.7% |
| Lord Pym | Con | (1987-2008) | 1.9% |
| Baroness Quin | Lab | (2006-present) | 0.9% |
| Lord Quinton | Con | (1983-2010) | 4.5% |
| Lord Quirk | Crossbench | (1994-2017) | 16.8% |
| Lord Radice | Lab | (2001-2022) | 0.6% |
| Baroness Ramsay of Cartvale | Lab | (1996-present) | 0.3% |
| Lord Ramsbotham | Crossbench | (2005-2022) | 15.1% |
| Baroness Ramsey of Wall Heath | Lab | (2024-present) | 0.0% |
| Lord Rana | Con | (2016-2024) | 3.1% |
| Lord Rana | Crossbench | (2004-2016) | 59.0% |
| Lord Randall of St Budeaux | Lab | (1997-2012) | 3.0% |
| Lord Randall of Uxbridge | Con | (2018-present) | 9.0% |
| Baroness Randerson | LDem | (2011-present) | 1.0% |
| Lord Ranger | Con | (2019-present) | 1.2% |
| Lord Ranger of Northwood | Con | (2023-present) | 0.0% |
| Lord Ravensdale | Crossbench | (2019-present) | 24.8% |
| Baroness Rawlings | Con | (1994-present) | 0.7% |
| Lord Rawlinson of Ewell | Con | (1978-2006) | 1.0% |
| Lord Rayne | Crossbench | (1976-2003) | n/a |
| Lord Razzall | LDem | (1997-present) | 0.3% |
| Lord Rea | Lab | (1981-2020) | 4.0% |
| Lord Reay | Con | (1963-2013) | 1.9% |
| Lord Reay | Con | (2019-present) | 0.0% |
| Baroness Rebuck | Lab | (2014-present) | 0.3% |
| Lord Redesdale | LDem | (2000-present) | 1.0% |
| Baroness Redfern | Con | (2015-present) | 0.3% |
| Lord Reed of Allermuir | Crossbench | (2020-present) | n/a |
| Lord Rees | Con | (1987-2008) | 0.9% |
| Lord Rees-Mogg | Crossbench | (1988-2012) | 24.6% |
| Lord Rees of Ludlow | Crossbench | (2005-present) | 22.6% |
| Lord Reid of Cardowan | Lab | (2010-present) | 1.0% |
| Lord Remnant | Con | (2022-present) | 0.0% |
| Baroness Rendell of Babergh | Lab | (1997-2015) | 1.0% |
| Lord Renfrew of Kaimsthorn | Con | (1991-2021) | 1.1% |
| Lord Rennard | LDem | (1999-present) | 1.0% |
| Lord Renton | Con | (1979-2007) | 0.9% |
| Lord Renton of Mount Harry | Con | (1997-2016) | 5.2% |
| Lord Renwick of Clifton | Crossbench | (2008-2018) | 33.3% |
| Lord Renwick of Clifton | Lab | (1997-2007) | 2.1% |
| Lord Ribeiro | Con | (2010-2023) | 1.6% |
| Lord Richard | Lab | (1990-2018) | 1.6% |
| Lord Richards of Herstmonceux | Crossbench | (2014-present) | 38.2% |
| Lord Richardson | Crossbench | (1979-2004) | 0.0% |
| Baroness Richardson of Calow | Crossbench | (1998-2018) | 38.5% |
| Lord Richardson of Duntisbourne | Crossbench | (1983-2010) | 4.8% |
| Lord Ricketts | Crossbench | (2016-present) | 7.7% |
| Viscount Ridley | Con | (2013-2021) | 1.9% |
| The Bishop of Ripon and Leeds | Bishop | (2006-2014) | 4.7% |
| Lord Risby | Con | (2011-present) | 0.2% |
| Baroness Ritchie of Brompton | Con | (2010-2012) | 0.0% |
| Baroness Ritchie of Downpatrick | Non-affiliated | (2019-present) | 12.9% |
| Lord Rix | Crossbench | (1992-2016) | 16.4% |
| Lord Robathan | Con | (2015-present) | 1.7% |
| Lord Roberts of Belgravia | Con | (2022-present) | 0.5% |
| Lord Roberts of Conwy | Con | (1997-2013) | 0.8% |
| Lord Roberts of Llandudno | LDem | (2004-present) | 1.8% |
| Lord Robertson of Port Ellen | Crossbench | (2000-2004) | n/a |
| Lord Robertson of Port Ellen | Lab | (2004-present) | 1.1% |
| Lord Robertson of Port Ellen | Other | (1999-2000) | n/a |
| Lord Roborough | Con | (2022-present) | 0.0% |
| The Bishop of Rochester | Bishop | (1999-2009) | 13.3% |
| The Bishop of Rochester | Bishop | (2014-2021) | 0.0% |
| Baroness Rock | Con | (2015-present) | 0.7% |
| Lord Rodger of Earlsferry | Judge | (1992-2011) | n/a |
| Lord Rodgers of Quarry Bank | LDem | (1992-2023) | 2.0% |
| Lord Rogan | UUP | (1999-present) | 0.1% |
| Lord Rogers of Riverside | Lab | (1996-2021) | 2.4% |
| Lord Roll of Ipsden | Crossbench | (1977-2005) | 51.2% |
| Lord Rooker | Lab | (2001-present) | 2.0% |
| Lord Roper | LDem | (2000-2015) | 0.8% |
| Lord Rose of Monewden | Con | (2014-present) | 0.0% |
| Lord Rosenfield | Con | (2023-present) | 0.0% |
| Lord Rosser | Lab | (2004-2024) | 0.3% |
| The Earl of Rosslyn | Crossbench | (1977-present) | 0.0% |
| Lord Rotherwick | Con | (1996-2022) | 1.0% |
| Lord Rowe-Beddoe | Crossbench | (2006-2023) | 25.1% |
| Lord Rowlands | Lab | (2004-present) | 0.4% |
| Baroness Royall of Blaisdon | Lab | (2004-present) | 0.4% |
| Lord Runcie | Crossbench | (1991-2000) | n/a |
| Earl Russell | LDem | (1987-2004) | 0.7% |
| Earl Russell | LDem | (2023-present) | 0.0% |
| Lord Russell-Johnston | LDem | (1997-2008) | 3.8% |
| Lord Russell of Liverpool | Crossbench | (2014-present) | 6.1% |
| Lord Ryder of Eaton Hastings | Other | (1975-2003) | n/a |
| Baroness Ryder of Warsaw | Crossbench | (1979-2000) | n/a |
| Lord Ryder of Wensum | Con | (1997-2021) | 0.8% |
| Lord Saatchi | Con | (1996-present) | 0.9% |
| Lord Sacks | Crossbench | (2009-2020) | n/a |
| Lord Sahota | Lab | (2022-present) | 0.0% |
| Lord Sainsbury of Preston Candover | Con | (1989-2022) | 3.0% |
| Lord Sainsbury of Turville | Lab | (1997-2021) | 0.0% |
| The Bishop of Salisbury | Bishop | (1998-2010) | 0.0% |
| The Bishop of Salisbury | Bishop | (2015-2021) | 0.0% |
| The Marquess of Salisbury | Con | (1992-2017) | n/a |
| Lady Saltoun of Abernethy | Crossbench | (1979-2014) | 26.0% |
| Lord Sandberg | LDem | (1997-2015) | 3.3% |
| Lord Sanderson of Bowden | Con | (1985-2018) | 0.6% |
| Baroness Sanderson of Welton | Con | (2019-present) | 0.4% |
| Lord Sandhurst | Con | (2021-present) | 0.2% |
| The Earl of Sandwich | Crossbench | (1995-2024) | 18.8% |
| Lord Sarfraz | Con | (2020-present) | 0.2% |
| Lord Sassoon | Con | (2010-present) | 0.5% |
| Baroness Sater | Con | (2018-present) | 0.2% |
| Lord Saville of Newdigate | Crossbench | (1997-2024) | 0.0% |
| Lord Sawyer | Lab | (1998-present) | 0.7% |
| Lord Scanlon | Lab | (1979-2004) | n/a |
| Lord Scarman | Crossbench | (1977-2004) | n/a |
| Baroness Scotland of Asthal | Lab | (1997-present) | 0.4% |
| Baroness Scott of Bybrook | Con | (2015-present) | 0.1% |
| Lord Scott of Foscote | Crossbench | (2000-2016) | 21.9% |
| Baroness Scott of Needham Market | LDem | (2000-present) | 0.3% |
| Lord Scriven | LDem | (2014-present) | 0.4% |
| Baroness Seccombe | Con | (1991-present) | 0.7% |
| Lord Sedwill | Crossbench | (2020-present) | 0.0% |
| Lord Sefton of Garston | Lab | (1978-2001) | n/a |
| The Earl of Selborne | Con | (1971-2019) | 1.8% |
| The Earl of Selborne | Non-affiliated | (2019-2020) | 66.7% |
| Lord Selkirk of Douglas | Con | (1997-2023) | 0.6% |
| Lord Selsdon | Con | (1963-2021) | 1.2% |
| Lord Sentamu | Crossbench | (2021-present) | 15.8% |
| Baroness Serota | Lab | (1967-2002) | 0.0% |
| Lord Sewel | Lab | (1996-2012) | 0.4% |
| Lord Sewel | Non-affiliated | (2012-2015) | n/a |
| Lord Sewell of Sanderstead | Con | (2022-present) | 0.0% |
| Baroness Shackleton of Belgravia | Con | (2010-present) | 2.1% |
| Baroness Shafik | Crossbench | (2020-present) | 30.0% |
| Lord Shamash | Lab | (2024-present) | 0.0% |
| Lord Sharkey | LDem | (2010-present) | 1.3% |
| Lord Sharma | Con | (2024-present) | 0.0% |
| Lord Sharman | LDem | (1999-2015) | 2.4% |
| Lord Sharpe of Epsom | Con | (2020-present) | 0.3% |
| Baroness Sharp of Guildford | LDem | (1998-2016) | 1.0% |
| Baroness Sharples | Con | (1973-2017) | 1.3% |
| Lord Shawcross | Crossbench | (1959-2003) | n/a |
| Lord Shaw of Northstead | Con | (1994-2015) | 0.8% |
| Baroness Sheehan | LDem | (2015-present) | 0.1% |
| The Bishop of Sheffield | Bishop | (2003-2008) | 0.0% |
| The Bishop of Sheffield | Bishop | (2013-2016) | 0.0% |
| The Bishop of Sheffield | Bishop | (2023-present) | 0.0% |
| Lord Sheikh | Con | (2006-2022) | 0.8% |
| Lord Sheldon | Lab | (2001-2015) | 5.2% |
| Baroness Shephard of Northwold | Con | (2005-present) | 0.2% |
| Lord Shepherd | Lab | (1954-2001) | 0.0% |
| Lord Sheppard of Didgemere | Con | (1994-2015) | 0.0% |
| Lord Sheppard of Liverpool | Lab | (1998-2005) | 0.0% |
| Lord Sherbourne of Didsbury | Con | (2013-present) | 0.8% |
| Baroness Sherlock | Lab | (2010-present) | 0.3% |
| Baroness Shields | Con | (2014-present) | 0.2% |
| Lord Shinkwin | Con | (2015-present) | 4.0% |
| Lord Shipley | LDem | (2010-present) | 1.5% |
| Lord Shore of Stepney | Lab | (1997-2001) | 14.9% |
| The Earl of Shrewsbury | Con | (1980-present) | 0.6% |
| Lord Shutt of Greetland | LDem | (2000-2020) | 0.8% |
| Lord Sieff of Brimpton | Con | (1980-2001) | n/a |
| Lord Sikka | Lab | (2020-present) | 0.8% |
| Viscount Simon | Lab | (1993-2021) | 2.1% |
| Lord Simon of Glaisdale | Crossbench | (1971-2006) | 20.5% |
| Lord Simon of Highbury | Lab | (1997-2005) | 0.0% |
| Lord Simon of Highbury | Lab | (2008-2010) | n/a |
| Lord Simon of Highbury | Non-affiliated | (2010-2017) | n/a |
| Lord Simon of Highbury | Other | (2005-2008) | n/a |
| Lord Simpson of Dunkeld | Lab | (1997-2004) | 0.0% |
| Lord Simpson of Dunkeld | Lab | (2005-2005) | n/a |
| Lord Simpson of Dunkeld | Lab | (2010-2012) | n/a |
| Lord Simpson of Dunkeld | Non-affiliated | (2012-2015) | n/a |
| Lord Simpson of Dunkeld | Other | (2004-2005) | n/a |
| Lord Simpson of Dunkeld | Other | (2005-2010) | n/a |
| Lord Singh of Wimbledon | Crossbench | (2011-present) | 19.7% |
| Lord Skelmersdale | Con | (1973-2018) | 1.2% |
| Lord Skidelsky | Crossbench | (1991-present) | 30.5% |
| Viscount Slim | Crossbench | (1970-2019) | 24.7% |
| Lord Slynn of Hadley | Crossbench | (1992-2009) | 15.4% |
| Baroness Smith of Basildon | Lab | (2010-present) | 0.4% |
| Lord Smith of Clifton | LDem | (1997-2019) | 2.0% |
| Baroness Smith of Cluny | Lab | (2024-present) | 0.0% |
| Lord Smith of Finsbury | Lab | (2005-2008) | 4.4% |
| Lord Smith of Finsbury | Non-affiliated | (2008-present) | 10.3% |
| Baroness Smith of Gilmorehill | Lab | (1995-present) | 0.8% |
| Lord Smith of Hindhead | Con | (2015-present) | 0.0% |
| Lord Smith of Kelvin | Crossbench | (2008-present) | 35.1% |
| Lord Smith of Leigh | Lab | (1999-2021) | 1.2% |
| Baroness Smith of Llanfaes | PC | (2024-present) | 0.0% |
| Baroness Smith of Malvern | Lab | (2024-present) | 0.0% |
| Baroness Smith of Newnham | LDem | (2014-present) | 1.3% |
| Lord Snape | Lab | (2004-present) | 0.7% |
| The Earl of Snowdon | Crossbench | (1999-2016) | n/a |
| Lord Soames of Fletching | Con | (2022-present) | 0.0% |
| Lord Soley | Lab | (2005-2023) | 0.7% |
| The Duke of Somerset | Crossbench | (2014-present) | 17.1% |
| Lord Soulsby of Swaffham Prior | Con | (1990-2015) | 2.0% |
| The Bishop of Southwark | Bishop | (1996-2010) | 4.3% |
| The Bishop of Southwark | Bishop | (2014-present) | 0.0% |
| The Bishop of Southwell and Nottingham | Bishop | (2005-2009) | 0.0% |
| The Bishop of Southwell and Nottingham | Bishop | (2004-2005) | 23.1% |
| The Bishop of Southwell and Nottingham | Bishop | (2022-present) | 0.0% |
| Lord Spellar | Lab | (2024-present) | 0.0% |
| Lord Spencer of Alresford | Con | (2020-present) | 0.0% |
| Lord Spicer | Con | (2010-2019) | 0.0% |
| The Bishop of St Albans | Bishop | (1999-2009) | 0.0% |
| The Bishop of St Albans | Bishop | (2013-present) | 0.6% |
| The Bishop of St Edmundsbury and Ipswich | Bishop | (2002-2007) | 0.0% |
| The Bishop of St Edmundsbury and Ipswich | Bishop | (2011-2013) | 0.0% |
| The Bishop of St Edmundsbury and Ipswich | Bishop | (2022-present) | 0.0% |
| Lord St John of Bletso | Crossbench | (1978-present) | 26.9% |
| Lord St John of Fawsley | Con | (1987-2012) | 4.3% |
| The Earl of Stair | Crossbench | (2008-present) | 23.6% |
| Lord Stallard | Lab | (1983-2008) | 8.9% |
| Viscount Stansgate | Lab | (2021-present) | 0.4% |
| Baroness Stedman-Scott | Con | (2010-present) | 0.2% |
| Lord Steel of Aikwood | LDem | (1997-2019) | 3.7% |
| Lord Steel of Aikwood | LDem | (2019-2020) | 0.0% |
| Lord Steel of Aikwood | Non-affiliated | (2019-2019) | 0.0% |
| Lord Steel of Aikwood | Non-affiliated | (2020-2020) | n/a |
| Lord Steinberg | Con | (2004-2009) | 1.0% |
| Lord Stephen | LDem | (2011-present) | 0.4% |
| Lord Sterling of Plaistow | Con | (1991-present) | 1.0% |
| Baroness Stern | Crossbench | (1999-present) | 19.9% |
| Lord Stern of Brentford | Crossbench | (2007-present) | 15.2% |
| Lord Stevens of Birmingham | Crossbench | (2021-present) | 12.1% |
| Lord Stevens of Kirkwhelpington | Crossbench | (2005-present) | 36.0% |
| Lord Stevens of Ludgate | Con | (1987-2004) | 2.9% |
| Lord Stevens of Ludgate | Conservative Independent | (2004-2012) | n/a |
| Lord Stevens of Ludgate | Conservative Independent | (2018-present) | 0.0% |
| Lord Stevens of Ludgate | Crossbench | (2004-2004) | n/a |
| Lord Stevens of Ludgate | Non-affiliated | (2004-2004) | n/a |
| Lord Stevens of Ludgate | UKIP | (2012-2018) | 0.0% |
| Lord Stevenson of Balmacara | Lab | (2010-present) | 0.3% |
| Lord Stevenson of Coddenham | Crossbench | (1999-2023) | 5.6% |
| Lord Stewartby | Con | (1992-2015) | 1.4% |
| Lord Stewart of Dirleton | Con | (2020-present) | 0.0% |
| Lord Steyn | Crossbench | (1995-2017) | 20.0% |
| Lord Stirrup | Crossbench | (2011-present) | 48.7% |
| Lord Stodart of Leaston | Con | (1981-2003) | 0.8% |
| Lord Stoddart of Swindon | Independent Labour | (1983-2020) | n/a |
| Lord Stokes | Crossbench | (1969-2008) | 0.0% |
| Lord Stone of Blackheath | Lab | (1997-2019) | 0.8% |
| Lord Stone of Blackheath | Non-affiliated | (2019-present) | 8.6% |
| Lord Stoneham of Droxford | LDem | (2011-present) | 0.8% |
| Lord Storey | LDem | (2011-present) | 0.9% |
| Baroness Stowell of Beeston | Con | (2011-2018) | 0.8% |
| Baroness Stowell of Beeston | Non-affiliated | (2018-present) | 69.5% |
| Lord Strabolgi | Lab | (1953-2010) | 1.9% |
| Baroness Strange | Crossbench | (1986-2005) | 18.4% |
| Lord Strasburger | LDem | (2011-2015) | 7.6% |
| Lord Strasburger | LDem | (2015-present) | 0.5% |
| Lord Strasburger | Non-affiliated | (2015-2015) | n/a |
| Lord Stratford | Lab | (2005-2006) | 0.0% |
| Lord Strathcarron | Con | (2022-present) | 0.0% |
| Lord Strathclyde | Con | (1985-present) | 1.1% |
| Baroness Stroud | Con | (2015-present) | 2.8% |
| Baroness Stuart of Edgbaston | Non-affiliated | (2020-present) | 48.1% |
| Lord Stunell | LDem | (2015-2024) | 0.1% |
| Lord Sugar | Crossbench | (2017-present) | 100.0% |
| Lord Sugar | Lab | (2009-2015) | 0.0% |
| Lord Sugar | Non-affiliated | (2015-2017) | 100.0% |
| Baroness Sugg | Con | (2016-present) | 0.6% |
| Lord Suri | Con | (2014-present) | 0.9% |
| Lord Sutherland of Houndwood | Crossbench | (2001-2018) | 31.1% |
| Baroness Suttie | LDem | (2013-present) | 0.2% |
| Baroness Swinburne | Con | (2023-present) | 0.0% |
| Lord Swinfen | Con | (1977-2022) | 3.2% |
| Lord Swire | Con | (2022-present) | 0.0% |
| Baroness Symons of Vernham Dean | Lab | (1996-present) | 0.6% |
| Lord Tanlaw | Con | (2015-2017) | 2.4% |
| Lord Tanlaw | Crossbench | (1971-2015) | 18.9% |
| Lord Tarassenko | Crossbench | (2024-present) | 43.8% |
| Lord Taverne | LDem | (1996-present) | 3.1% |
| Lord Taylor of Blackburn | Lab | (1978-2016) | 0.8% |
| Baroness Taylor of Bolton | Lab | (2005-present) | 0.3% |
| Lord Taylor of Goss Moor | LDem | (2010-present) | 2.2% |
| Lord Taylor of Gryfe | Lab | (1968-2001) | 0.0% |
| Lord Taylor of Holbeach | Con | (2006-present) | 0.6% |
| Baroness Taylor of Stevenage | Lab | (2022-present) | 0.0% |
| Lord Taylor of Warwick | Con | (1996-2010) | 0.0% |
| Lord Taylor of Warwick | Non-affiliated | (2010-present) | 50.8% |
| Lord Tebbit | Con | (1992-2022) | 1.6% |
| Lord Temple-Morris | Lab | (2001-2018) | 1.3% |
| Lord Templeman | Crossbench | (1982-2014) | 0.0% |
| Viscount Tenby | Crossbench | (1983-2015) | 19.0% |
| Lord Teverson | LDem | (2006-present) | 0.9% |
| Baroness Thatcher | Con | (1992-2013) | 0.0% |
| Lord Thomas of Cwmgiedd | Judge | (2013-present) | 6.7% |
| Lord Thomas of Gresford | LDem | (1996-present) | 1.6% |
| Lord Thomas of Gwydir | Con | (1987-2008) | 0.0% |
| Lord Thomas of Macclesfield | Lab | (1997-2016) | 1.1% |
| Lord Thomas of Swynnerton | Crossbench | (1981-2017) | 32.9% |
| Baroness Thomas of Walliswood | LDem | (1994-2016) | 1.5% |
| Baroness Thomas of Winchester | LDem | (2006-present) | 1.0% |
| Lord Thomson of Monifieth | LDem | (1977-2008) | 1.2% |
| Baroness Thornhill | LDem | (2015-present) | 0.2% |
| Baroness Thornton | Lab | (1998-present) | 0.3% |
| Lord Thurlow | Crossbench | (2015-present) | 41.4% |
| Viscount Thurso | LDem | (2016-present) | 0.5% |
| Lord Timpson | Lab | (2024-present) | 0.0% |
| Lord Tombs | Crossbench | (1990-2015) | 14.0% |
| Lord Tomlinson | Lab | (1998-2024) | 0.7% |
| Baroness Tonge | Independent Liberal Democrat | (2012-2016) | n/a |
| Baroness Tonge | LDem | (2005-2012) | 8.9% |
| Baroness Tonge | Non-affiliated | (2016-2021) | 10.7% |
| Lord Tope | LDem | (1994-present) | 1.2% |
| Lord Tordoff | LDem | (1981-2016) | 2.1% |
| Lord Touhig | Lab | (2010-present) | 0.9% |
| Lord Trees | Crossbench | (2012-present) | 21.4% |
| Lord Trefgarne | Con | (1960-present) | 1.5% |
| Viscount Trenchard | Con | (2004-present) | 2.6% |
| Lord Trevethin and Oaksey | Crossbench | (2015-present) | 41.4% |
| Lord Triesman | Lab | (2004-present) | 0.9% |
| Lord Trimble | Con | (2007-2022) | 1.2% |
| Lord Trimble | Crossbench | (2006-2007) | 21.5% |
| Lord Trotman | Crossbench | (1999-2005) | n/a |
| Lord True | Con | (2011-present) | 0.9% |
| Baroness Trumpington | Con | (1980-2017) | 1.5% |
| The Bishop of Truro | Bishop | (2001-2008) | 7.1% |
| The Bishop of Truro | Bishop | (2013-2017) | 0.0% |
| Lord Truscott | Lab | (2004-2009) | 0.7% |
| Lord Truscott | Non-affiliated | (2009-present) | 13.0% |
| Lord Tugendhat | Con | (1993-present) | 5.2% |
| Lord Tunnicliffe | Lab | (2004-present) | 0.5% |
| Lord Turnberg | Lab | (2000-present) | 1.1% |
| Lord Turnbull | Crossbench | (2005-present) | 32.1% |
| Baroness Turner of Camden | Lab | (1985-2017) | 3.1% |
| Lord Turner of Ecchinswell | Crossbench | (2005-present) | 12.2% |
| Baroness Twycross | Lab | (2022-present) | 0.0% |
| Lord Tyler | LDem | (2005-2021) | 1.6% |
| Baroness Tyler of Enfield | LDem | (2011-present) | 0.6% |
| Lord Tyrie | Non-affiliated | (2018-present) | 55.6% |
| Baroness Uddin | Lab | (1998-2010) | 3.6% |
| Baroness Uddin | Non-affiliated | (2010-present) | 10.8% |
| Lord Udny-Lister | Con | (2020-present) | 0.0% |
| Viscount Ullswater | Con | (2003-2022) | 1.1% |
| Baroness Vadera | Lab | (2007-2011) | 0.0% |
| Baroness Vadera | Non-affiliated | (2011-present) | n/a |
| Lord Vaizey of Didcot | Con | (2020-present) | 0.0% |
| Baroness Valentine | Crossbench | (2005-present) | 17.1% |
| Lord Vallance of Balham | Lab | (2024-present) | 0.0% |
| Lord Vallance of Tummel | LDem | (2004-2020) | 1.2% |
| Lord Varley | Lab | (1990-2008) | 0.0% |
| Lord Vaux of Harrowden | Crossbench | (2017-present) | 20.5% |
| Lord Verdirame | Non-affiliated | (2022-present) | 44.0% |
| Baroness Vere of Norbiton | Con | (2016-present) | 0.1% |
| Lord Verjee | LDem | (2013-present) | 0.0% |
| Baroness Verma | Con | (2006-present) | 1.0% |
| Lord Vincent of Coleshill | Crossbench | (1996-2016) | 13.8% |
| Lord Vinson | Con | (1985-2022) | 5.7% |
| Lord Vivian | Con | (1991-2004) | 0.3% |
| Lord Waddington | Con | (1990-2015) | 1.6% |
| Lord Wade of Chorlton | Con | (1990-2016) | 1.2% |
| The Bishop of Wakefield | Bishop | (2009-2014) | 0.0% |
| The Bishop of Wakefield | Bishop | (1997-2002) | 2.9% |
| Lord Wakeham | Con | (1992-present) | 0.7% |
| Lord Waldegrave of North Hill | Con | (1999-present) | 2.2% |
| Lord Walker of Aldringham | Crossbench | (2007-present) | 35.7% |
| Lord Walker of Doncaster | Lab | (1997-2003) | 1.2% |
| Lord Walker of Gestingthorpe | Judge | (2002-2021) | 18.6% |
| Lord Walker of Worcester | Con | (1992-2010) | 2.2% |
| Lord Wallace of Coslany | Lab | (1975-2003) | 0.0% |
| Lord Wallace of Saltaire | LDem | (1995-present) | 0.9% |
| Lord Wallace of Tankerness | LDem | (2007-2021) | 1.9% |
| Lord Wallace of Tankerness | LDem | (2022-present) | 0.0% |
| Lord Wallace of Tankerness | Non-affiliated | (2021-2022) | 19.0% |
| Baroness Wall of New Barnet | Lab | (2004-2017) | 0.4% |
| Baroness Walmsley | LDem | (2000-present) | 0.7% |
| Lord Walney | Non-affiliated | (2020-present) | 25.6% |
| Lord Walpole | Crossbench | (1989-2017) | 19.9% |
| Lord Walton of Detchant | Crossbench | (1989-2016) | 14.1% |
| Lord Warner | Crossbench | (2002-2003) | n/a |
| Lord Warner | Crossbench | (2016-2024) | 8.9% |
| Lord Warner | Lab | (1998-2002) | 0.0% |
| Lord Warner | Lab | (2003-2015) | 0.0% |
| Lord Warner | Non-affiliated | (2015-2016) | 8.7% |
| Baroness Warnock | Crossbench | (1985-2015) | 17.1% |
| Baroness Warsi | Con | (2007-present) | 6.1% |
| Baroness Warwick of Undercliffe | Lab | (1999-present) | 0.9% |
| Lord Wasserman | Con | (2011-present) | 4.8% |
| Baroness Watkins of Tavistock | Crossbench | (2015-present) | 15.4% |
| Lord Watson of Invergowrie | Lab | (1997-present) | 0.4% |
| Lord Watson of Richmond | LDem | (1999-2023) | 1.6% |
| Lord Watson of Wyre Forest | Lab | (2022-present) | 0.4% |
| Lord Watts | Lab | (2015-present) | 0.9% |
| Viscount Waverley | Crossbench | (1990-present) | 45.3% |
| Lord Weatherill | Crossbench | (1992-2007) | 22.3% |
| Lord Wedderburn of Charlton | Crossbench | (2006-2007) | 35.1% |
| Lord Wedderburn of Charlton | Lab | (1977-2006) | 17.6% |
| Lord Wedderburn of Charlton | Lab | (2007-2012) | n/a |
| Lord Wedderburn of Charlton | Other | (2007-2007) | n/a |
| Lord Wei | Con | (2010-present) | 0.4% |
| Lord Weidenfeld | Crossbench | (1976-2016) | 50.0% |
| Lord Weinstock | Crossbench | (1980-2002) | 0.0% |
| Lord Weir of Ballyholme | DUP | (2022-present) | 3.4% |
| The Duke of Wellington | Con | (2015-2019) | 25.4% |
| The Duke of Wellington | Crossbench | (2020-present) | 13.7% |
| The Duke of Wellington | Non-affiliated | (2019-2020) | 6.7% |
| Lord West of Spithead | Lab | (2007-present) | 3.1% |
| Lord Whaddon | Lab | (1978-2005) | 0.0% |
| Baroness Wharton | Crossbench | (1990-2000) | 25.0% |
| Lord Wharton of Yarm | Con | (2020-present) | 0.2% |
| Baroness Wheatcroft | Con | (2011-2019) | 10.9% |
| Baroness Wheatcroft | Crossbench | (2021-present) | 11.7% |
| Baroness Wheatcroft | Non-affiliated | (2019-2021) | 11.3% |
| Baroness Wheeler | Lab | (2010-present) | 0.1% |
| Baroness Whitaker | Lab | (1999-present) | 1.0% |
| Lord Whitby | Con | (2013-present) | 0.2% |
| Baroness White | Lab | (1970-1999) | n/a |
| Lord Whitty | Lab | (1996-present) | 0.8% |
| Lord Wigley | PC | (2011-present) | 0.0% |
| Lord Wigoder | LDem | (1974-2004) | 4.1% |
| Lord Wilberforce | Crossbench | (1964-2003) | 13.3% |
| Baroness Wilcox | Con | (1996-2020) | 1.2% |
| Baroness Wilcox of Newport | Lab | (2019-present) | 0.2% |
| Baroness Wilkins | Lab | (1999-2015) | 1.8% |
| Lord Willetts | Con | (2015-present) | 5.7% |
| Lord Williams of Baglan | Crossbench | (2011-2017) | 55.3% |
| Lord Williams of Baglan | Lab | (2010-2010) | n/a |
| Lord Williams of Baglan | Lab | (2011-2011) | n/a |
| Lord Williams of Baglan | Other | (2010-2011) | n/a |
| Baroness Williams of Crosby | LDem | (1993-2016) | 4.8% |
| Lord Williams of Elvel | Lab | (1985-2019) | 2.4% |
| Lord Williams of Mostyn | Lab | (1992-2003) | 1.1% |
| Lord Williamson of Horton | Crossbench | (1999-2015) | 23.7% |
| Lord Williams of Oystermouth | Crossbench | (2013-2020) | 0.0% |
| Baroness Williams of Trafford | Con | (2013-present) | 0.5% |
| Lord Willis of Knaresborough | LDem | (2010-present) | 1.6% |
| Baroness Willis of Summertown | Crossbench | (2022-present) | 7.7% |
| Lord Willoughby de Broke | Con | (1986-2004) | 1.1% |
| Lord Willoughby de Broke | Conservative Independent | (2004-2007) | n/a |
| Lord Willoughby de Broke | Non-affiliated | (2018-2024) | 82.2% |
| Lord Willoughby de Broke | UKIP | (2007-2018) | 0.0% |
| Lord Wills | Lab | (2010-present) | 0.6% |
| Lord Wilson of Dinton | Crossbench | (2003-present) | 14.6% |
| Lord Wilson of Tillyorn | Crossbench | (1992-2021) | 30.3% |
| The Bishop of Winchester | Bishop | (1996-2011) | 7.0% |
| The Bishop of Winchester | Bishop | (2012-2022) | 4.8% |
| The Bishop of Winchester | Bishop | (2023-present) | n/a |
| Lord Windlesham | Con | (1962-2010) | 0.7% |
| Lord Winston | Lab | (1995-present) | 2.3% |
| Baroness Winterton of Doncaster | Lab | (2024-present) | 0.0% |
| Baroness Wolf of Dulwich | Crossbench | (2015-2020) | 30.3% |
| Baroness Wolf of Dulwich | Non-affiliated | (2020-present) | 26.7% |
| Lord Wolfson | Con | (1985-2010) | 3.6% |
| Lord Wolfson of Aspley Guise | Con | (2010-present) | 0.7% |
| Lord Wolfson of Sunningdale | Con | (1991-2017) | 0.0% |
| Lord Wolfson of Tredegar | Con | (2020-present) | 0.2% |
| Lord Wood of Anfield | Lab | (2011-present) | 0.5% |
| Lord Woodley | Lab | (2020-present) | 0.3% |
| Lord Woolf | Crossbench | (1992-present) | 16.6% |
| Lord Woolley of Woodford | Crossbench | (2019-present) | 19.6% |
| Lord Woolmer of Leeds | Lab | (1999-2020) | 0.4% |
| The Bishop of Worcester | Bishop | (2002-2007) | 7.6% |
| The Bishop of Worcester | Bishop | (2012-2024) | 0.0% |
| Baroness Worthington | Crossbench | (2018-present) | 7.1% |
| Baroness Worthington | Lab | (2011-2017) | 0.0% |
| Baroness Worthington | Non-affiliated | (2017-2018) | 0.0% |
| Lord Wrigglesworth | LDem | (2013-present) | 0.3% |
| Lord Wright of Richmond | Crossbench | (1994-2019) | 19.7% |
| Lord Wrottesley | Con | (2022-present) | 0.0% |
| Baroness Wyld | Con | (2017-present) | 0.2% |
| The Archbishop of York | Bishop | (1990-2005) | n/a |
| The Archbishop of York | Bishop | (2006-2020) | 1.7% |
| The Archbishop of York | Bishop | (2020-present) | n/a |
| Baroness Young | Con | (1971-2002) | 0.0% |
| Lord Young of Cookham | Con | (2015-present) | 1.9% |
| Lord Young of Dartington | Lab | (1978-2002) | 4.2% |
| Viscount Younger of Leckie | Con | (1997-2003) | 0.0% |
| Viscount Younger of Leckie | Con | (2010-present) | 0.4% |
| Lord Young of Graffham | Con | (1984-2022) | 1.5% |
| Baroness Young of Hornsey | Crossbench | (2004-present) | 20.9% |
| Lord Young of Norwood Green | Lab | (2004-present) | 1.0% |
| Baroness Young of Old Scone | Lab | (1997-2000) | 0.0% |
| Baroness Young of Old Scone | Lab | (2015-present) | 0.3% |
| Baroness Young of Old Scone | Non-affiliated | (2000-2015) | n/a |
| Lord Young of Old Windsor | Non-affiliated | (2023-present) | 51.9% |