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This is a list of political parties in the United Kingdom, by their historic representation in elected bodies.
British House of Commons
PartyFoundedFirst representedLast representedDissolvedMaximum representationMPsNotesAlba Party202120212024N/A 2 (2021) Kenny MacAskill; Neale Hanvey Split from the Scottish National PartyAll-for-Ireland League19091909191819188 (1910)Alliance Party of Northern Ireland19701973PresentN/A1 (1973)Stephen Farry; Naomi Long; Stratton Mills; Sorcha EastwoodAnti H-Block19811981198219821 (1981)Bobby Sands; Owen CarronMerged into Sinn FéinAnti-Waste League19211921192219222 (1921)James Malcolm Monteith Erskine; Murray SueterBlaenau Gwent People's Voice20052010201120111 (2010) Peter Law, Dai DaviesBritish Socialist Party19111920192019201 (1920)Cecil L'Estrange MaloneMerged into the Communist Party of Great BritainChange UK201920192019201911 (2019)ListSplit from the Labour and Conservative Parties in February 2019, dissolved December 2019Christian Pacifist (Fellowship of Reconciliation)191519231924N/A1 (1923)George M. Ll. DaviesCoalition Labour 1918 1918 1922 1922Colne Valley Labour Union18911907191019181 (1907)Victor GraysonWon the 1907 Colne Valley by-electionCommonwealth Labour Party19421942194719471 (1942)Harry MidgleyCommon Wealth Party19421942194619935 (1945)ListCommunist Party of Great Britain19201920195019912 (1945)Willie Gallacher; Cecil L'Estrange Malone; Walton Newbold; Phil Piratin; Shapurji SaklatvalaConservative Party18351835PresentN/A473 (1931)ListConstitutionalists192319231925192912 (1923)Winston Churchill, Hamar Greenwood, Algernon Moreing, Thomas Robinson, John Ward, Abraham England, Henry Hogbin, John SturrockCo-operative Party19171918PresentN/A38 (2017)ListAffiliated with the Labour Party since 1927Democratic Labour19721972197419791 (1972)Dick TaverneDemocratic Party19691969197019711 (1969)Desmond DonnellyDemocratic Unionist Party19711971PresentN/A10 (2017)ListFormed from the Protestant Unionist PartyEmpire Free Trade Crusade1929193019311930s1 (1930)Ernest TaylorJoint candidate with the United Empire PartyEnglish National Party1960s1976197619801 (1976)John StonehouseFederation of Labour19441945194919491 (1945)Jack BeattieMerged into the Irish Labour Party19731992PresentN/A4 (2024)Cynog Dafis; Caroline Lucas; Sian Berry; Carla Denyer; Ellie Chowns; Adrian RamsayDafis was a joint candidate with Plaid CymruCrofters Party1880s188518951890s4 (1885)Gavin Brown Clark; Charles Fraser-Mackintosh; Roderick MacDonald; Donald Horne Macfarlane Independent Alliance (UK) 2024 2024 PresentN/A 5 (2024) Jeremy Corbyn, Shockat Adam, Adnan Hussain, Iqbal Mohamed, Ayoub Khan Not a full-fledged party, but a Technical groupIndependent Irish Party185218521858185840 (1852)Split from the Liberal PartyIndependent Kidderminster Hospital and Health Concern200020012010N/A1 (2001)Richard TaylorIndependent Liberals19311931193519355 (1931)David Lloyd George; Gwilym Lloyd George; Megan Lloyd George; Frank Owen; Goronwy OwenNot a separate party per se; its members were official Liberal Party candidates who rejected the National Government.Independent Labour Party1893189319471975Affiliated with the Labour Party from 1900 until 1931Independent Parliamentary Group1920192019211921Irish Confederate Party18471847184818482 (1847)Thomas Chisholm Anstey; William Smith O'BrienIrish Labour Party191219491955N/A1 (1949)Jack BeattieLabour Independent Group19491949195019505 (1949)Lester Hutchinson; John Platts-Mills; Denis Nowell Pritt; Leslie Solley; Konni ZilliacusLabour Party19061906PresentN/A418 (1997)ListFormed from the Labour Representation CommitteeLabour Independent Group19491949195019505 (1949)Denis Pritt, Lester Hutchinson, John Platts-Mills, Leslie Solley, Konni ZilliacusDenis Pritt was expelled from the Labour Party in 1940 for supporting the Soviet Union in the Winter War, the rest were for supporting Soviet Foreign PolicyLabour Representation Committee190019001906190629 (1906)ListBecame the Labour PartyLiberal Democrats19881988PresentN/A72 (2024)ListMerger of the Liberal Party and the Social Democratic PartyLiberal Party1859185919881988397 (1906)ListMerged into the Liberal DemocratsLiberal Unionist Party188618861912191277 (1886)ListSplit from the Liberal Party; merged into the Conservative PartyMebyon Kernow195119641970N/A2 (1964)Peter Bessell, John Pardoe, David Muddmulti party membership Militant tendency 19641983199119914 (1983)Eric Heffer, Dave Nellist, Terry Fields, Pat WallNational Association of Discharged Sailors and Soldiers19161918192119211 (1918)Robert Hewitt BarkerSemi-official candidate, sponsored by local branch of organisationNational Democratic and Labour Party19181918192219239 (1918)National Party19171917192119218 (1917)Nationalist Party (Ireland)187018701955197786 (1885)ListNational Labour193119311945194514 (1931)ListNational Liberal Party193119311968196855 (1950)ListAffiliated with the Conservative Party from 1947National Socialist Party19161918191919193 (1918)Dan Irving; Jack Jones; Will ThorneAffiliated with the Labour PartyNew Party19301930193119326 (1931)Oliver Baldwin; W. J. Brown; Robert Forgan; Cynthia Mosley; Oswald Mosley; John StracheyBaldwin and Brown held membership for a single day Nordic League 1935 1935 1939 1939 1 (1935) Archibald Maule RamsayNorthern Ireland Labour Party19241943194319871 (1943)Jack BeattiePlaid Cymru19251966PresentN/A4 (1992)ListProtestant Unionist Party19661970197119711 (1970)Ian PaisleyBecame the Democratic Unionist PartyReferendum Party19941997199719971 (1997)George GardinerRepublican Labour Party19641966197019731 (1970)Gerry FittReclaim Party202020232023N/A1 (2023)Andrew BridgenReform League18651865186918696 (1865)George Howell (trade unionist), Sir Wilfrid Lawson, 2nd Baronet, of Brayton, Peter Alfred Taylor, Samuel Morley (MP), Charles Bradlaugh, John BrightReform UK20182024PresentN/A8 (2026) List Founded as the Brexit PartyRespect Party20042005201520161 (2005)George Galloway Russellite Unionist1904190419101910 3 (1904) Sir Thomas Russell, 1st Baronet, James Wood, Edward Mitchell, Robert GlendinningScotland United20232023PresentN/A3 (2023)Kenny MacAskill; Neale Hanvey; Angus MacNeilPolitical GroupingScottish Labour Party (1888)18881888189218931 (1888)Robert Cunninghame-GrahamMerged into the Independent Labour PartyScottish Labour Party (1976)19761976197919792 (1976)John Robertson; Jim SillarsSplit from the Labour PartyScottish National Party19341945PresentN/A56 (2015)ListScottish Prohibition Party19011922193119351 (1922)Edwin ScrymgeourSinn Féin19051917PresentN/A73 (1918)ListSinn Féin MPs do not take their seatsSocial Democratic Party198119811988198829 (1982)ListMerged into the Liberal DemocratsSocial Democratic Party (1988)198819881990199029 (1982)Rosie Barnes, John Cartwright, David OwenFormed by Social Democratic Party members who did not join the Liberal DemocratsSocial Democratic and Labour Party19701970PresentN/A4 (1992)ListTraditional Unionist Voice20072024PresentN/A1 (2024Jim AllisterUK Unionist Party19951995200120081 (1995)Robert McCartneyUlster Popular Unionist Party19801980199519951 (1980)James KilfedderUlster Unionist Labour Association191819181922N/A3 (1918)Thomas Henry Burn; Thompson Donald; Samuel McGuffinLinked with the Ulster Unionist PartyUlster Unionist Party19051905PresentN/A20 (1918)ListAt times affiliated to the Conservative PartyUnited Empire Party1920s193019311930s1 (1930)Ernest TaylorJoint candidate with the Empire Free Trade CrusadeUnited Ulster Unionist Party19751975198219821 (1975)John DunlopSplit from the Vanguard Unionist Progressive PartyUK Independence Party199320082017N/A2 (2014)Douglas Carswell; Mark RecklessUnity1960s1969197419772 (1970)Bernadette Devlin; Frank McManusVanguard Unionist Progressive Party19731973197819783 (1974)Robert Bradford; William Craig; John DunlopSplit from and later merged into the Ulster Unionist Party Workers Party of Britain 2019 2024 2024 N/A 1 (2024) George GallowayYour Party202520252025N/A1 (2025)Zarah Sultana Repeal Association 1830 1832 1847 1848 42 (1832) Also Known as the Irish Repeal Party Home Rule League 1873 1874 1880 1882 59 (1874) 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 1 (1847) Birkenhead Social Justice 2019 2019 2019 2019 1 (2019) The Independents (UK) 2019 2019 2019 2019 5 (2019) Gavin Shuker, John Woodcock, Luciana Berger, Angela Smith, Heidi Allen Scottish Socialist Party (1932) 1932 1932 1940 1940 2 (1932) Neil Maclean, Thomas Johnston Ministerialist 1768 1768 1774 1774 225 (1766) Lord North Northite 1774 1774 1784 1784 396 (1780) Bedford Whigs 1751 1751 1774 1783 23 (1751) Rockingham Whigs 1765 1768 1784 1784 254 (1780) William Dowdeswell, Henry Seymour Conway Grenville Whigs 1740 1765 1774 1774 41 (1768) George Grenville Radicals 1750 1768 1857 1859 15 (1852)
London Assembly PartyFoundedFirst representedLast representedDissolvedMaximum representationAMsNotes Brexit Alliance 2018 2018 2021 2021 2 (2018) Peter Whittle, David Kurten British National Party 1982 2008 2010 N/A 1 (2008) Richard Barnbrook Was expelled from party in first termCommunist Party of Great Britain19201946194919902 (1946)Ted Bramley, Jack GasterConservative and Unionist Party 1835 1946N/AN/A 11 (2008)London Green Party 1990 2000N/AN/A 3 (2000)Heritage Party 2020 2020 2021N/A 1 (2020) David KurtenLabour and Co-Operative Party 1909 1910N/AN/A 101 (1958)Liberal Party18591946198619886 (1925)Liberal Democrats 1988 2000 N/A N/A 5 (2004)One London 2005 2005 2008 2008 2 (2005) Damian Hockney, Peter Hulme-CrossMunicipal Reform Party190619061946194683 (1925)Progressive Party188818891928192898 (1901)UK Independence Party 1993 2004 2020 N/A 2 (2004) Damian Hockney, Peter Hulme-Cross, Peter Whittle, David Kurten Veritas 2005 2005 2005 2015 2 (2005) Damian Hockney, Peter Hulme-Cross Briefly before Forming One London
British House of Lords