This article lists the Leaders of political parties in the United Kingdom to provide insight into the politics of the United Kingdom. It contains details including which party the leader belongs to, the leader's seat, and which form of leadership that person holds.

Leaders in the House of Commons National party leaders are usually members of parliament. Some (including Welsh, Scottish and Northern Irish parties) designate a separate leader in the House of Commons, or their leader is absent from the House of Commons and holds membership of a devolved body. Andy Burnham Leader of the Labour Party Kemi Badenoch Leader of the Conservative Party

LeaderPartyLeader's seatNumber of seatsLeader since Andy Burnham Labour Party Makerfield 403 17 July 2026 Kemi Badenoch Conservative Party North West Essex 118 2 November 2024 Ed Davey Liberal Democrats Kingston and Surbiton 71 27 August 2020 Dave Doogan Scottish National Party Angus and Perthshire Glens 8 12 May 2026 Nigel FarageReform UK73 June 2024 N/A Sinn Féin N/A 7 Gavin Robinson Democratic Unionist Party Belfast East 5 29 March 2024 Ellie Chowns Green Party of England and Wales North Herefordshire 5 4 September 2025 Liz Saville Roberts Plaid Cymru Dwyfor Meirionnydd 4 14 June 2017 Claire Hanna Social Democratic and Labour Party Belfast South and Mid Down 2 5 October 2024 Sorcha Eastwood Alliance Party of Northern Ireland Lagan Valley 1 4 July 2024 Rupert Lowe Restore Britain Great Yarmouth 1 13 February 2026 Robin Swann Ulster Unionist Party South Antrim 1 4 July 2024 Jim Allister Traditional Unionist Voice North Antrim 1 4 July 2024 Leads the party in the House of Commons. The leader of the Scottish National Party (SNP), John Swinney has been a Member of the Scottish Parliament (MSP) since 1999. Farage is not currently a member of the House of Commmons. He is currently running in the 2026 Clacton by-election. In accordance with the party's policy of abstentionism, no elected Sinn Féin members of parliament have ever sat in the House of Commons. Leads the party in the House of Commons. The Green Party's leader, Zack Polanski, has sat as a member of the London Assembly since 2021. Leads the party in the House of Commons. Plaid Cymru's leader, Rhun ap Iorwerth, has sat as a member of the Senedd (Welsh Parliament) for Ynys Môn since 2 August 2013.

Leaders in the House of Lords LeaderPartyMembersLeader since Nicholas True, Baron True Conservative Party 272 14 July 2016 Baroness Smith of Basildon Labour Party 186 27 May 2015 The Lord Purvis of Tweed Liberal Democrats 78 25 July 2025

Leaders in the Scottish Parliament LeaderPartyLeader's seatNumberof seatsLeader since John Swinney Scottish National Party Perthshire North 58 8 May 2024 Michael Marra Scottish Labour North East Scotland (region) 17 19 September 2026 Malcolm Offord Reform UK Scotland West Scotland (region) 17 15 January 2026 Ross Greer Scottish Greens West Scotland (region)15 29 August 2025 Gillian Mackay Central Scotland (region) 29 August 2025 Russell Findlay Scottish Conservatives West Scotland (region) 12 27 September 2024 Alex Cole-Hamilton Scottish Liberal Democrats Edinburgh North Western 10 20 August 2021

Leaders in the Senedd LeaderPartyLeader's seatNumberof seatsLeader since Rhun ap Iorwerth Plaid Cymru – Party of Wales Bangor Conwy Môn 43 16 June 2023 Helen Jenner Reform UK Wales Bangor Conwy Môn 34 15 September 2026 Ken Skates Welsh Labour Fflint Wrecsam 9 9 May 2026 Darren Millar Welsh Conservatives Clwyd 7 5 December 2024 Anthony Slaughter Wales Green Party Caerdydd Penarth 2 December 2018 Jane Dodds Welsh Liberal Democrats Brycheiniog Tawe Nedd 1 3 November 2017

Leaders in the Northern Ireland Assembly LeaderPartyLeader's seatNumberof seatsLeader since Michelle O'Neill Sinn Féin Mid Ulster 27 23 January 2017 N/A Democratic Unionist Party Belfast East (as an MP) 25 29 March 2024 Naomi Long Alliance Party of Northern Ireland Belfast East 17 26 October 2016 Mike Nesbitt Ulster Unionist Party Strangford 9 28 September 2024 Matthew O'Toole Social Democratic and Labour Party Belfast South 8 13 May 2022 N/A Traditional Unionist Voice North Antrim (as an MP) 1 7 December 2007 Collective leadership People Before Profit N/A 1 N/A The leader of the Democratic Unionist Party (DUP), Gavin Robinson has sat in the House of Commons as MP for Belfast East since 2015. The leader of the Traditional Unionist Voice (TUV), Jim Allister was previously a North Antrim MLA until his election to the House of Commons in 2024 as MP for North Antrim.

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