List of political parties in the United Kingdom by representation

This is a list of political parties in the United Kingdom, by their historic representation in elected bodies.

British House of Commons
Party Founded First represented Last represented Dissolved Maximum representation MPs Notes
All-for-Ireland League 1909 1909 1918 1918 8 (1910)
Alliance Party of Northern Ireland 1970 1973 Present N/A 1 (1973) Naomi Long; Stratton Mills
Anti H-Block 1981 1981 1982 1982 1 (1981) Bobby Sands; Owen Carron Merged into Sinn Féin
Anti-Waste League 1921 1921 1922 1922 2 (1921) James Malcolm Monteith Erskine; Murray Sueter
British Socialist Party 1911 1920 1920 1920 1 (1920) Cecil L'Estrange Malone Merged into the Communist Party of Great Britain
Change UK 2019 2019 2019 2019 11 (2019) List Split from the Labour and Conservative Parties in February 2019, dissolved December 2019
Common Wealth Party 1942 1942 1946 1993 5 (1945) List
Communist Party of Great Britain 1920 1920 1950 1991 2 (1945) Willie Gallacher; Cecil L'Estrange Malone; Walton Newbold; Phil Piratin; Shapurji Saklatvala
Conservative Party 1835 1835 Present N/A 473 (1931) List
Co-operative Party 1917 1918 Present N/A 30 (2001) List Affiliated with the Labour Party since 1927
Democratic Labour 1972 1972 1974 1979 1 (1972) Dick Taverne
Democratic Party 1969 1969 1970 1971 1 (1969) Desmond Donnelly
Democratic Unionist Party 1971 1971 Present N/A 10 (2017) List Formed from the Protestant Unionist Party
Empire Free Trade Crusade 1929 1930 1931 1930s 1 (1930) Ernest Taylor Joint candidate with the United Empire Party
English National Party 1960s 1976 1976 1980 1 (1976) John Stonehouse
Federation of Labour 1944 1945 1949 1949 1 (1945) Jack Beattie Merged into the Irish Labour Party
Green Party of England and Wales 1973 1992 Present N/A 1 (1992) Cynog Dafis; Caroline Lucas Dafis was a joint candidate with Plaid Cymru
Crofters Party 1880s 1885 1895 1890s 4 (1885) Gavin Brown Clark; Charles Fraser-Mackintosh; Roderick MacDonald; Donald Horne Macfarlane
Independent Irish Party 1852 1852 1858 1858 40 (1852) Split from the Liberal Party
Independent Kidderminster Hospital and Health Concern 2000 2001 2010 N/A 1 (2001) Richard Taylor
Independent Liberals 1931 1931 1935 1935 5 (1931) David Lloyd George; Gwilym Lloyd George; Megan Lloyd George; Frank Owen; Goronwy Owen Not a separate party per se; its members were official Liberal Party candidates who rejected the National Government.
Independent Labour Party 1893 1893 1947 1975 Affiliated with the Labour Party from 1900 until 1931
Independent Parliamentary Group 1920 1920 1921 1921
Irish Confederate Party 1847 1847 1848 1848 2 (1847) Thomas Chisholm Anstey; William Smith O'Brien
Irish Labour Party 1912 1949 1955 N/A 1 (1949) Jack Beattie
Labour Independent Group 1949 1949 1950 1950 5 (1949) Lester Hutchinson; John Platts-Mills; Denis Nowell Pritt; Leslie Solley; Konni Zilliacus
Labour Party 1906 1906 Present N/A 418 (1997) List Formed from the Labour Representation Committee
Labour Representation Committee 1900 1900 1906 1906 29 (1906) List Became the Labour Party
Liberal Democrats 1988 1988 Present N/A 62 (2005) List Merger of the Liberal Party and the Social Democratic Party
Liberal Party 1859 1859 1988 1988 397 (1906) List Merged into the Liberal Democrats
Liberal Unionist Party 1886 1886 1912 1912 77 (1886) List Split from the Liberal Party; merged into the Conservative Party
Mebyon Kernow 1951 1964 1970 N/A 2 (1964) Peter Bessell, John Pardoe, David Mudd multi party membership
National Association of Discharged Sailors and Soldiers 1916 1918 1921 1921 1 (1918) Robert Hewitt Barker Semi-official candidate, sponsored by local branch of organisation
National Democratic and Labour Party 1918 1918 1922 1923 9 (1918)
National Party 1917 1917 1921 1921 8 (1917)
Nationalist Party (Ireland) 1870 1870 1955 1977 86 (1885) List
National Labour 1931 1931 1945 1945 14 (1931) List
National Liberal Party 1931 1931 1968 1968 55 (1950) List Affiliated with the Conservative Party from 1947
National Socialist Party 1916 1918 1919 1919 3 (1918) Dan Irving; Jack Jones; Will Thorne Affiliated with the Labour Party
New Party 1930 1930 1931 1932 6 (1931) Oliver Baldwin; W. J. Brown; Robert Forgan; Cynthia Mosley; Oswald Mosley; John Strachey Baldwin and Brown held membership for a single day
Northern Ireland Labour Party 1924 1943 1943 1987 1 (1943) Jack Beattie
Plaid Cymru 1925 1966 Present N/A 4 (1992) List
Protestant Unionist Party 1966 1970 1971 1971 1 (1970) Ian Paisley Became the Democratic Unionist Party
Referendum Party 1994 1997 1997 1997 1 (1997) George Gardiner
Republican Labour Party 1964 1966 1970 1973 1 (1970) Gerry Fitt
Respect Party 2004 2005 2015 2016 1 (2005) George Galloway
Scottish Labour Party (1888) 1888 1888 1892 1893 1 (1888) Robert Cunninghame-Graham Merged into the Independent Labour Party
Scottish Labour Party (1976) 1976 1976 1979 1979 2 (1976) John Robertson; Jim Sillars Split from the Labour Party
Scottish National Party 1934 1945 Present N/A 56 (2015) List
Scottish Prohibition Party 1901 1922 1931 1935 1 (1922) Edwin Scrymgeour
Sinn Féin 1905 1917 Present N/A 73 (1918) List Sinn Féin MPs do not take their seats
Social Democratic Party 1981 1981 1988 1988 29 (1982) List Merged into the Liberal Democrats
Social Democratic Party (1988) 1988 1988 1990 1990 29 (1982) Rosie Barnes, John Cartwright, David Owen Formed by Social Democratic Party members who did not join the Liberal Democrats
Social Democratic and Labour Party 1970 1970 Present N/A 4 (1992) List
UK Unionist Party 1995 1995 2001 2008 1 (1995) Robert McCartney
Ulster Popular Unionist Party 1980 1980 1995 1995 1 (1980) James Kilfedder
Ulster Unionist Labour Association 1918 1918 1922 N/A 3 (1918) Thomas Henry Burn; Thompson Donald; Samuel McGuffin Linked with the Ulster Unionist Party
Ulster Unionist Party 1905 1905 2017 N/A 20 (1918) List At times affiliated to the Conservative Party
United Empire Party 1920s 1930 1931 1930s 1 (1930) Ernest Taylor Joint candidate with the Empire Free Trade Crusade
United Ulster Unionist Party 1975 1975 1982 1982 1 (1975) John Dunlop Split from the Vanguard Unionist Progressive Party
UK Independence Party 1993 2008 2017 N/A 2 (2014) Douglas Carswell; Mark Reckless
Unity 1960s 1969 1974 1977 2 (1970) Bernadette Devlin; Frank McManus
Vanguard Unionist Progressive Party 1973 1973 1978 1978 3 (1974) Robert Bradford; William Craig; John Dunlop Split from and later merged into the Ulster Unionist Party
Repeal Association 1830 1832 1847 1848 1832(42) Also Known as the Irish Repeal Party
Home Rule League 1873 1874 1880 1882 1874 (59) Became the Irish Parliamentary Party
Liberal–Labour 1870 1874 1918 1918
Independent Conservative 1911 1911 N/A N/A
Independent Nationalist 1880 1880 1955 N/A N/A Not a Political Party but a Description for Irish Nationalist who are not affiliated with a Political Party same meaning as the Description used in the Northern Ireland Assembly today
Chartist 1838 1847 1852 1857 1847 (1) Feargus O'Connor

British House of Lords
Party Founded First represented Last represented Dissolved Maximum representation Members Notes
Communist Party of Great Britain 1920 1962 1991 1991 1 (1962) Wogan Philipps
Conservative Party 1835 1835 Present N/A
Green Party of England and Wales 1973 1980s Present N/A 1 (1999) George MacLeod; Timothy Beaumont, Baron Beaumont of Whitley; Jenny Jones, Baroness Jones of Moulsecoomb[1][2]
Labour Party 1906 1924 Present N/A
Liberal Democrats 1988 1988 Present N/A Merger of the Liberal Party and the Social Democratic Party
Liberal Party 1859 1859 1988 1988 Merged into the Liberal Democrats
Social Democratic Party 1981 1981 1988 1988 Merged into the Liberal Democrats
Social Democratic Party (1988) 1988 1988 1990 1990 17 (1988) Continuation of the Social Democratic Party
United Kingdom Independence Party 1993 1990s Present N/A 2 (2007) Richard Norton, 8th Baron Grantley; Malcolm Pearson, Baron Pearson of Rannoch; David Verney, 21st Baron Willoughby de Broke

Northern Ireland Assembly
Party Founded First represented Last represented Dissolved Maximum representation MLAs Notes
Alliance Party of Northern Ireland 1970 1998 Present N/A 8 (2011) John Alderdice; Eileen Bell; Seamus Close; Judith Cochrane; Stewart Dickson; Stephen Farry; David Ford; Anna Lo; Naomi Long; Trevor Lunn; Chris Lyttle; Keiran McCarthy; Seán Neeson
Democratic Unionist Party 1971 1998 Present N/A 38 (2011)
Green Party in Northern Ireland 1983 2007 Present N/A 2 (2016) Steven Agnew; Brian Wilson; Clare Bailey
NI21 2013 2013 2016 2016 2 (2013) Basil McCrea, John McCallister Split from the Ulster Unionist Party
Northern Ireland Unionist Party 1999 1999 2003 2008 4 (1999) Norman Boyd; Roger Hutchinson; Patrick Roche; Cedric Wilson Split from the UK Unionist Party
Northern Ireland Women's Coalition 1996 1998 2003 2006 2 (1998) Monica McWilliams; Jane Morrice
People Before Profit Alliance 2005 2016 Present N/A 2 (2016) Gerry Carroll; Eamonn McCann
Progressive Unionist Party 1979 1998 2010 N/A 2 (1998) Billy Hutchinson; Dawn Purvis; David Ervine
Sinn Féin 1905 1998 Present N/A 29 (2011)
Social Democratic and Labour Party 1970 1998 Present N/A 24 (1998)
Traditional Unionist Voice 2007 2011 Present N/A 1 (2011) Jim Allister
UK Unionist Party 1995 1998 2007 2008 5 (1998) Norman Boyd; Roger Hutchinson; Robert McCartney; Patrick Roche; Cedric Wilson
United Unionist Assembly Party 1998 1998 2003 N/A 3 (1998) Fraser Agnew; Boyd Douglas; Denis Watson
Ulster Unionist Party 1905 1998 Present N/A 28 (1998)

Scottish Parliament
Party Founded First represented Last represented Dissolved Maximum representation MSPs Notes
Scottish Conservative and Unionist Party 1965 1999 Present N/A 31 (2016)
Scottish Green Party 1990 1999 Present N/A 7 (2003)
Scottish Labour Party 1909 1999 Present N/A 56 (1999)
Scottish Liberal Democrats 1988 1999 Present N/A 17 (1999)
Scottish National Party 1934 1999 Present N/A 69 (2011)
Scottish Senior Citizens Unity Party 2003 2003 2007 N/A 1 (2003) John Swinburne
Scottish Socialist Party 1998 1999 2007 N/A 6 (2003)
Solidarity 2006 2006 2007 N/A 2 (2006) Rosemary Byrne; Tommy Sheridan Split from the Scottish Socialist Party

Welsh Parliament (formerly: National Assembly of Wales)
Party Founded First represented Last represented Dissolved Maximum representation AMs/MSs Notes
John Marek Independent Party/Forward Wales 2003 2003 2007 2003 (John Marek Independent Party)/2010 (Forward Wales) 1 (2003) John Marek
Plaid Cymru 1925 1999 Present N/A 17 (1999)
United Kingdom Independence Party 1993 2016 Present N/A 7 (2016)
Wales Labour Party 1947 1999 Present N/A 30 (2003)
Welsh Conservative Party 1921 1999 Present N/A 12 (2007)
Welsh Liberal Democrats 1988 1999 Present N/A 6 (1999)
Welsh National Party 2020 2020 Present N/A 1 (2020) Neil McEvoy The Party did gained four councillers, a month later, after the party's formation.
Abolish the Welsh Assembly Party 2015 2020 Present N/A 1 (2020) Gareth Bennett Prior of Bennett's joined the party, the party's got its first counciller, who's defected from the Welsh Conservative Party, a month ago.

European Parliament
Party Founded First represented Last represented Dissolved Maximum representation MEPs Notes
British National Party 1982 2009 2014 N/A 2 (2009) Andrew Brons; Nick Griffin
Brexit Party 2019 2019 2020 N/A 23 (2019) List
Change UK – The Independent Group 2019 2019 2019 N/A 1 (2019) List
Conservative Party 1835 1979 2020 N/A 60 (1979)
Democratic Unionist Party 1971 1979 2020 N/A 1 (1979) Jim Allister; Diane Dodds; Ian Paisley
Green Party of England and Wales 1973 1999 2020 N/A 3 (2014) Jean Lambert; Caroline Lucas; Keith Taylor; Molly Scott Cato
Independent Labour Network 1999 1999 1999 2003 1 (1999) Ken Coates Split from the Labour Party
Labour Party 1906 1979 2020 N/A 62 (1994)
Liberal Democrats 1988 1994 2020 N/A 12 (2004)
Libertarian Party 2007 2018 2019 N/A 1 (2019) Bill Etheridge The briefly got first representative in October 2018, but soon their representative later joined the Brexit Party in February 2019.
Plaid Cymru 1925 1999 2020 N/A 2 (1999) Jillian Evans; Eurig Wyn
Pro-Euro Conservative Party 1999 1999 1999 2001 2 (1999) Brendan Donnelly; John Stevens Split from the Conservative Party
Scottish National Party 1934 1979 2020 N/A 2 (1994) Winifred Ewing; Ian Hudghton; Allan Macartney; Neil MacCormick; Alyn Smith
Scottish Socialist Party 1998 1998 1999 N/A 1 (1998) Hugh Kerr
Sinn Féin 1905 2004 2020 N/A 1 (2004) Bairbre de Brún; Martina Anderson Also had an MEP elected in the Republic of Ireland
Social Democratic and Labour Party 1970 1979 2004 N/A 1 (1979) John Hume
Social Democratic Party 1981 1984 1984 1988 1 (1984) Michael Gallagher
Social Democratic Party (1990-present) 1990 2018 2019 N/A 1 (2018) Patrick O'Flynn This is the second continuation and current incarnation of the original Social Democratic Party
Traditional Unionist Voice 2007 2007 2009 N/A 1 (2007) Jim Allister
United Kingdom Independence Party 1993 1999 2019 N/A 24 (2014)
Ulster Unionist Party 1905 1979 2019 N/A 1 (1979) Jim Nicholson; John Taylor
Veritas 2005 2005 2005 2015 1 (2005) Robert Kilroy-Silk Split from the United Kingdom Independence Party; merged into the English Democrats

See also

References
  1. "Introductions" Democracy Live (House of Lords; published by the BBC), 5 November 2013; "Introduction: Baroness Jones of Moulsecoomb – in the House of Lords at 2:38 pm on 5th November 2013." They Work For You 5 November 2013
  2. Vowles, Neil. "Baroness of Moulsecoomb gives first speech in House of Lords". The Argus. Retrieved 2 December 2013.
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