Leaders of the United Kingdom
(United Kingdom of Great Britain and Northern Ireland)
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Look for biographies of the leaders (in Spanish) at CIDOB's website. See also the CIDOB page detailing the British Governments since 1940. You also may browse the special page on the political leadership in Northern Ireland and Scotland.
Kings
George VI             12 Dec 1936 -  6 Feb 1952 (†1952)     
Elizabeth II           6 Feb 1952 -  8 Sep 2022 (†2022)      
Charles III            8 Sep 2022 -               

Prime Ministers
Winston Churchill     10 May 1940 - 26 Jul 1945 (†1965) Conservative
Clement Attlee        26 Jul 1945 - 26 Oct 1951 (†1967) Labour
Winston Churchill     26 Oct 1951 -  6 Apr 1955 (†1965) Conservative
Anthony Eden           6 Apr 1955 - 10 Jan 1957 (†1977) Conservative
Harold Macmillan      10 Jan 1957 - 18 Oct 1963 (†1986) Conservative
Alec Douglas-Home     18 Oct 1963 - 16 Oct 1964 (†1995) Conservative
Harold Wilson         16 Oct 1964 - 19 Jun 1970 (†1995) Labour
Edward Heath          19 Jun 1970 -  4 Mar 1974 (†2005) Conservative
Harold Wilson          4 Mar 1974 -  5 Apr 1976 (†1995) Labour
James Callaghan        5 Apr 1976 -  4 May 1979 (†2005) Labour
Margaret Thatcher      4 May 1979 - 28 Nov 1990 (†2013) Conservative
John Major            28 Nov 1990 -  2 May 1997         Conservative
Tony Blair             2 May 1997 - 27 Jun 2007         Labour
Gordon Brown          27 Jun 2007 - 11 May 2010         Labour
David Cameron         11 May 2010 - 13 Jul 2016         Conservative     
Theresa May           13 Jul 2016 - 24 Jul 2019         Conservative
Boris Johnson         24 Jul 2019 -  6 Sep 2022         Conservative
Elizabeth Truss        6 Sep 2022 - 25 Oct 2022         Conservative
Rishi Sunak           25 Oct 2022 -                     Conservative

Deputy Prime Ministers
Clement Attlee        19 Feb 1942 - 26 Jul 1945 (†1967) Labour
Herbert Morrison      27 Jul 1945 - 26 Oct 1951 (†1965) Labour 
Anthony Eden          27 Oct 1951 -  6 Apr 1955 (†1977) Conservative
Richard Austen Butler 13 Jul 1962 - 20 Oct 1963 (†1982) Conservative
William Whitelaw       5 May 1979 - 10 Jan 1988 (†1999) Conservative
Geoffrey Howe         24 Jul 1989 -  1 Nov 1990 (†2015) Conservative 
Michael Heseltine      5 Jul 1995 -  2 May 1997         Conservative   
John Prescott          2 May 1997 - 27 Jun 2007         Labour
Nick Clegg            11 May 2010 - 11 May 2015         Liberal Democrat
Dominic Raab          15 Sep 2021 - 13 Sep 2022         Conservative
Thérèse Coffey        13 Sep 2022 - 27 Oct 2022         Conservative
Dominic Raab          27 Oct 2022 - 21 Apr 2023         Conservative
Oliver Dowden         21 Apr 2023 -                     Conservative

Secretaries of State for Foreign and Commonwealth Affairs
Anthony Eden          1940-1945 (†1977) Conservative
Ernest Bevin          1945-1951 (†1951) Labour              
Herbert Morrison      1951      (†1965) Labour
Anthony Eden          1951-1955 (†1977) Conservative
Harold Macmillan      1955      (†1986) Conservative
Selwyn Lloyd          1955-1960 (†1978) Conservative
Alec Douglas-Home     1960-1963 (†1995) Conservative
Richard Austen Butler 1963-1964 (†1982) Conservative
Patrick Walker        1964-1965 (†1980) Labour
Michael Stewart       1965-1966 (†1990) Labour
George Brown          1966-1968 (†1985) Labour
Michael Stewart       1968-1970 (†1990) Labour
Alec Douglas-Home     1970-1974 (†1995) Conservatie
James Callaghan       1974-1976 (†2005) Labour 
Anthony Crosland      1976-1977 (†1977) Labour 
David Owen            1977-1979         Labour
Peter Carington       1979-1982 (†2018) Conservative
Francis Pym           1982-1983 (†2008) Conservative 
Geoffrey Howe         1983-1989 (†2015) Conservative 
John Major            1989              Conservative
Douglas Hurd          1989-1995         Conservative
Malcolm Rifkind       1995-1997         Conservative
Robin Cook            1997-2001 (†2005) Labour
Jack Straw            2001-2006         Labour 
Margaret Beckett      2006-2007         Labour
David Miliband        2007-2010         Labour
William Hague         2010-2014         Conservative
Philip Hammond        2014-2016         Conservative
Boris Johnson         2016-2018         Conservative
Jeremy Hunt           2018-2019         Conservative
Dominic Raab          2019-2021         Conservative
Elizabeth Truss       2021-2022         Conservative
James Cleverly        2022-2023         Conservative
David Cameron         2023-             Conservative

The Foreign Office and the Commonwealth Office were merged on 17 Oct 1968.


Chancellors of the Exchequer
John Anderson          1943-1945 (†1958) n/p
Hugh Dalton            1945-1947 (†1962) Labour
Stafford Cripps        1947-1950 (†1952) Labour
Hugh Gaitskell         1950-1951 (†1963) Labour
Richard Austen Butler  1951-1955 (†1982) Conservative
Harold Macmillan       1955-1957 (†1986) Conservative
Peter Thorneycroft     1957-1958 (†1994) Conservative
Derick Heathcoat-Amory 1958-1960 (†1981) Conservative
Selwyn Lloyd           1960-1962 (†1978) Conservative
Reginald Maudling      1962-1964 (†1979) Conservative
James Callaghan        1964-1967 (†2005) Labour
Roy Jenkins            1967-1970 (†2003) Labour 
Iain Macleod           1970      (†1970) Conservative
Anthony Barber         1970-1974 (†2005) Conservative
Denis Healey           1974-1979 (†2015) Labour 
Geoffrey Howe          1979-1983 (†2015) Conservative
Nigel Lawson           1983-1989 (†2023) Conservative
John Major             1989-1990         Conservative
Norman Lamont          1990-1993         Conservative
Kenneth Clarke         1993-1997         Conservative
Gordon Brown           1997-2007         Labour
Alistair Darling       2007-2010 (†2023) Labour
George Osborne         2010-2016         Conservative
Philip Hammond         2016-2019         Conservative
Sajid Javid            2019-2020         Conservative
Rishi Sunak            2020-2022         Conservative
Nadhim Zahawi          2022              Conservative
Kwasi Kwarteng         2022              Conservative
Jeremy Hunt            2022-             Conservative

Ministers of Defence and secretaries of State for Defence
Ministers
Winston Churchill     1940-1945 (†1965) Conservative
Clement Attlee        1945-1946 (†1967) Labour
Albert V. Alexander   1946-1950 (†1965) Labour  
Emanuel Shinwell      1950-1951 (†1986) Labour
Winston Churchill     1951-1952 (†1965) Conservative 
Harold Alexander      1952-1954 (†1969) military        
Harold Macmillan      1954-1955 (†1986) Conservative
Selwyn Lloyd          1955-1955 (†1978) Conservative
Walter Monckton       1955-1956 (†1965) Conservative
Antony Head           1956-1957 (†1983) Conservative
Duncan Duncan-Sandys  1957-1959 (†1987) Conservative
Harold Watkinson      1959-1962 (†1995) Conservative
Peter Thorneycroft    1962-1964 (†1994) Conservative

Secretaries of State 
Denis Healey          1964-1970 (†2015) Labour
Peter Carington       1970-1974 (†2018) Conservative
Ian Gilmour           1974      (†2007) Conservative
Roy Mason             1974-1976 (†2015) Labour
Frederick Mulley      1976-1979 (†1995) Labour 
Francis Pym           1979-1981 (†2008) Conservative 
John Nott             1981-1983         Conservative  
Michael Heseltine     1983-1986         Conservative
George Younger        1986-1989 (†2003) Conservative
Tom King              1989-1992         Conservative
Malcolm Rifkind       1992-1995         Conservative
Michael Portillo      1992-1997         Conservative
George Robertson      1997-1999         Labour
Geoff Hoon            1999-2005         Labour
John Reid             2005-2006         Labour
Des Browne            2006-2008         Labour
John Hutton           2008-2009         Labour
Bob Ainsworth         2009-2010         Labour
Liam Fox              2010-2011         Conservative
Philip Hammond        2011-2014         Conservative
Michael Fallon        2014-2017         Conservative
Gavin Williamson      2017-2019         Conservative
Penny Mordaunt        2019              Conservative
Ben Wallace           2019-2023         Conservative
Grant Shapps          2023-             Conservative

Secretaries of State for the Home Office
Herbert Morrison      1940-1945 (†1965) Labour
Donald Somervell      1945      (†1960) Conservative
James Chuter-Ede      1945-1951 (†1965) Labour
David Maxwell-Fyfe    1951-1954 (†1967) Conservative
Gwilym Lloyd-George   1954-1957 (†1967) Conservative
Richard Austen Butler 1957-1962 (†1982) Conservative
Henry Brooke          1962-1964 (†1984) Conservative
Frank Soskice         1964-1965 (†1979) Labour
Roy Jenkins           1965-1967 (†2003) Labour  
James Callaghan       1967-1970 (†2005) Labour
Reginald Maudling     1970-1972 (†1979) Conservative
Robert Carr           1972-1974 (†2012) Conservative 
Roy Jenkins           1974-1976 (†2003) Labour
Merlyn Rees           1976-1979 (†2006) Labour
William Whitelaw      1979-1983 (†1999) Conservative
Leon Brittan          1983-1985 (†2015) Conservative
Douglas Hurd          1985-1989         Conservative 
David Waddington      1989-1990 (†2017) Conservative
Kenneth Baker         1990-1992         Conservative
Kenneth Clarke        1992-1993         Conservative
Michael Howard        1993-1997         Conservative
Jack Straw            1997-2001         Labour
David Blunkett        2001-2004         Labour
Charles Clarke        2004-2006         Labour
John Reid             2006-2007         Labour
Jacqui Smith          2007-2009         Labour
Alan Johnson          2009-2010         Labour
Theresa May           2010-2016         Conservative
Amber Rudd            2016-2018         Conservative
Sajid Javid           2018-2019         Conservative
Priti Patel           2019-2022         Conservative
Suella Braverman      2022              Conservative
Grant Shapps          2022              Conservative
Suella Braverman      2022-2023         Conservative
James Cleverly        2023-             Conservative

Leaders of the House of Commons
Herbert Morrison      1945-1951 (†1965) Labour
James Chuter Ede      1951      (†1965) Labour
Harry Crookshank      1951-1955 (†1961) Conservative
Richard Austen Butler 1955-1961 (†1982) Conservative
Iain Macleod          1961-1963 (†1970) Conservative
Selwyn Lloyd          1963-1964 (†1978) Conservative
Herbert Bowden        1964-1966 (†1994) Labour
Richard Crossman      1966-1968 (†1974) Labour 
Fred Peart            1968-1970 (†1988) Labour
William Whitelaw      1970-1972 (†1999) Conservative
Robert Carr           1972      (†2012) Conservative
James Prior           1972-1974 (†2016) Conservative
Edward Short          1974-1976 (†2012) Labour
Michael Foot          1976-1979 (†2010) Labour
Norman St John-Stevas 1979-1981 (†2012) Conservative
Francis Pym           1981-1982 (†2008) Conservative
John Biffen           1982-1987 (†2007) Conservative 
John Wakeham          1987-1989         Conservative 
Geoffrey Howe         1989-1990 (†2015) Conservative     
John MacGregor        1990-1992         Conservative  
Tony Newton           1992-1997 (†2012) Conservative
Ann Taylor            1997-1998         Labour
Margaret Beckett      1998-2001         Labour
Robin Cook            2001-2003 (†2005) Labour
John Reid             2003              Labour
Peter Hain            2003-2005         Labour   
Geoff Hoon            2005-2006         Labour 
Jack Straw            2006-2007         Labour
Harriet Harman        2007-2010         Labour
George Young          2010-2012         Conservative
Andrew Lansley        2012-2014         Conservative
William Hague         2014-2015         Conservative
Chris Grayling        2015-2016         Conservative
David Lidington       2016-2017         Conservative
Andrea Leadsom        2017-2019         Conservative
Mel Stride            2019              Conservative
Jacob Rees-Mogg       2019-2022         Conservative
Mark Spencer          2022
Penny Mordaunt        2022-

Lord Chancellors (Concurrently, Secretraries of State of Justice from 2007)
William Jowitt             1945-1951 (†1957) Labour
Gavin Simonds              1951-1954 (†1971) Conservative
David Maxwell Fyfe         1954-1962 (†1967) Conservative
Reginald Manningham-Buller 1962-1964 (†1980) Conservative
Gerald Gardiner            1964-1970 (†1990) Labour
Quintin Hogg               1970-1974 (†2001) Conservative
Frederick Elwyn Jones      1974-1979 (†1989) Labour
Quintin Hogg               1979-1987 (†2001) Conservative
Michael Havers             1987      (†1992) Conservative
James Mackay               1987-1997         Conservative
Derry Irvine               1997-2003         Labour
Charles Falconer           2003-2007         Labour
Jack Straw                 2007-2010         Labour
Kenneth Clarke             2010-2012         Conservative
Chris Grayling             2012-2015         Conservative
Michael Gove               2015-2016         Conservative
Elizabeth Truss            2016-2017         Conservative
David Lidington            2017-2018         Conservative
David Gauke                2018-2019         Conservative
Robert Buckland            2019-2021         Conservative 
Dominic Raab               2021-2022         Conservative
Brandon Lewis              2022
Dominic Raab               2022-2023         Conservative
Alex Chalk                 2023-             Conservative

Leaders of the opposition
Clement Attlee        1945      (†1967) Labour
Winston Churchill     1945-1951 (†1965) Conservative
Clement Attlee        1951-1955 (†1967) Labour
Herbert Morrison      1955      (†1965) Labour 
Hugh Gaitskel         1955-1963 (†1963) Labour 
George Brown          1963      (†1985) Labour (acting)
Harold Wilson         1963-1964 (†1995) Labour
Alec Douglas-Home     1964-1965 (†1995) Conservative
Edward Heath          1965-1970 (†2005) Conservative
Harold Wilson         1970-1974 (†1995) Labour
Edward Heath          1974-1975 (†2005) Conservative
Margaret Thatcher     1975-1979 (†2013) Conservative
James Callaghan       1979-1980 (†2005) Labour
Michael Foot          1980-1983 (†2010) Labour
Neil Kinnock          1983-1992         Labour 
John Smith            1992-1994 (†1994) Labour
Margaret Beckett      1994              Labour (acting)
Tony Blair            1994-1997         Labour
John Major            1997              Conservative
William Hague         1997-2001         Conservative 
Iain Duncan Smith     2001-2003         Conservative 
Michael Howard        2003-2005         Conservative 
David Cameron         2005-2010         Conservative 
Harriet Harman        2010              Labour (acting)
Ed Miliband           2010-2015         Labour
Harriet Harman        2015              Labour (acting)
Jeremy Corbyn         2015-2020         Labour
Keir Starmer          2020-             Labour

Speakers of the House of Commons
Clifton Brown         1943-1951 (†1958) Conservative
William Morrison      1951-1959 (†1961) Conservative
Harry Hylton-Foster   1959-1965 (†1965) Conservative
Horace King           1965-1971 (†1986) Labour
Selwyn Lloyd          1971-1976 (†1978) Conservative
George Thomas         1976-1983 (†1997) Labour
Bernard Weatherill    1983-1992 (†2007) Conservative
Betty Boothroyd       1992-2000         Labour
Michael Martin        2000-2009 (†2018) Labour   
John Bercow           2009-2019         Conservative	
Lindsay Hoyle         2019-             Labour  

Lord Speakers of the House of Lords
Helene Hayman         2006-2011         n/p
Frances D'Souza       2011-2016         n/p
Norman Fowler         2016-             Conservative  

Leaders of the Labour Party
Leaders
Clement Attlee        1935-1955 (†1967) 
Hugh Gaitskell        1955-1963 (†1963)     
George Brown          1963      (†1985) (acting)
Harold Wilson         1963-1976 (†1995) 
James Callaghan       1976-1980 (†2005) 
Michael Foot          1980-1983 (†2010)        
Neil Kinnock          1983-1992         
John Smith            1992-1994 (†1994)     
Margaret Beckett      1994              (acting)
Tony Blair            1994-2007
Gordon Brown          2007-2010
Harriet Harman        2010              (acting)
Ed Miliband           2010-2015
Harriet Harman        2015              (acting)
Jeremy Corbyn         2015-2020
Keir Starmer          2020-

Deputy Leaders
Arthur Greenwood      1935–1945 (†1954)
Herbert Morrison      1945–1955 (†1965)
Jim Griffiths         1955–1959 (†1975)
Nye Bevan             1959–1960 (†1960)
George Brown          1960–1970 (†1985)
Roy Jenkins           1970–1972 (†2003)
Edward Short          1972–1976 (†2012)
Michael Foot          1976–1980 (†2010)
Denis Healey          1980–1983 (†2015)
Roy Hattersley        1983–1992 
Margaret Beckett      1992–1994 
John Prescott         1994–2007 
Harriet Harman        2007–2015
Tom Watson            2015-2019
Angela Rayner         2020-

Leaders of the Conservative Party
Winston Churchill     1940-1955 (†1965) 
Anthony Eden          1955-1957 (†1977) 
Harold Macmillan      1957-1963 (†1986) 
Alec Douglas-Home     1963-1965 (†1995) 
Edward Heath          1965-1975 (†2005) 
Margaret Thatcher     1975-1990 (†2013)        
John Major            1990-1997         
William Hague         1997-2001         
Iain Duncan Smith     2001-2003         
Michael Howard        2003-2005         
David Cameron         2005-2016
Theresa May           2016-2019
Boris Johnson         2019-2022
Elizabeth Truss       2022 
Rishi Sunak           2022-           

Heads of the Liberal Democrats
Leaders
Archibald Sinclair    1935-1945 (†1970)
Clement Davies        1945-1956 (†1962) 
Jo Grimond            1956-1967 (†1993) 
Jeremy Thorpe         1967-1976 (†2014)        
Jo Grimond            1976-1978 (†1993) (acting)
David Steel           1978-1988         
David Steel +                        
Robert Maclennan      1988      (†2020) (acting)
Paddy Ashdown         1988-1999 (†2018)        
Charles Kennedy       1999-2006 (†2015)       
Menzies Campbell      2006-2007
Vincent Cable         2007              (acting)
Nick Clegg            2007-2015
Tim Farron            2015-2017
Vince Cable           2017-2019
Jo Swinson            2019    
Ed Davey + 
Sal Brinton           2019-2020         (acting) 
Ed Davey +
Mark Pack             2020              (acting)
Ed Davey              2020-

Presidents
Ian Wrigglesworth     1989-1990
Charles Kennedy       1991-1994
Robert Maclennan      1995-1998 (†2020)
Diana Maddock         1999-2000
Navnit Dholakia       2001-2004
Simon Hughes          2005-2009
Rosalind Scott        2009-2010
Timothy Farron        2011-2014
Sarah Brinton         2015-2019
Mark Pack             2020-

The party was called Liberal Party (LP) to 3 Mar 1988, when it merged with the SDP (see below) to form the Social and Liberal Democrats (SLD). In Oct 1989 the party adopted the name of Liberal Democrats (Lib Dems), sometimes referred as the Liberal Democratic Party.


Heads of the Social Democratic Party (1982-1988)
Leaders
Roy Jenkins           1982-1983 (†2003) 
David Owen            1983-1987         
Robert Maclennan      1987-1988 (†2020)

Presidents
Shirley Williams      1982-1987 (†2021)
John Cartwright       1987-1988        

The Social Democratic Party (SDP) was founded on 2 Jul 1982 by splinters of the Labour Party. It merged with the Liberal Party on 3 Mar 1988 to form the SLD (see above), ceasing to exist.


Leaders of the UK Independence Party
Alan Sked             1993-1997
Craig Mackinlay       1997      (acting)
Michael Holmes        1997-2000
Jeffrey Titford       2000-2002
Roger Knapman         2002-2006
Nigel Farage          2006-2009
Malcolm Pearson       2009-2010
Jeffrey Titford       2010      (acting)
Nigel Farage          2010-2016
Diane James           2016      (elected, not installed)
Nigel Farage          2016      (acting)
Paul Nuttall          2016-2017
Steve Crowther        2017      (acting)
Henry Bolton          2017-2018
Gerard Batten         2018-2019 (acting to 2018)
Piers Wauchope        2019      (acting)
Richard Braine        2019
Patricia Mountain     2019-2020 (acting)
     ** vacant **     2020-

Leaders of Brexit Party and Reform UK
Catherine Blaiklock   2019
Nigel Farage          2019-2021
Richard Tice          2021-

The Brexit Party was launched on 23 Nov 2018 by splinters of UKIP. On 6 Jan 2021 the party was re-registered as Reform UK.

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