| No. | Prime Minister
(birth–death) |
Portrait | Elected | Took office | Left office | Political party | Government |
|---|---|---|---|---|---|---|---|
| 49 | Robert Gascoyne-Cecil
(1830-1903) |
 |
1895 | 25 June 1895 | 26 September 1900 | Conservative | Salisbury III (Con–Lib.U) |
| 50 | Keir Hardie
(1856-1915) |
 |
1900 | 26 September 1900 | 8 February 1908 | Labour | Hardie I |
| 1904 | Hardie II | ||||||
| 51 | Bonar Law
(1858-1923) |
 |
1908 | 8 February 1908 | 19 April 1920 | Conservative | Law I |
| 1911 | Law II | ||||||
| Law-War | |||||||
| 1918 | Law IV | ||||||
| 52 | Sir William Joynson-Hicks
(1865-1932) |
 |
- | 19 April 1920 | 17 January 1925 | Joynson-Hicks I | |
| 1921 | Joynson-Hicks II | ||||||
| 53 | Ramsay MacDonald
(1866-1937) |
 |
1925 | 17 January 1925 | 3 June 1928 | Labour | MacDonald |
| 54 | Austen Chamberlain
(1881-1959) |
 |
1928 | 3 June 1928 | 5 December 1931 | Conservative | Chamberlain |
| 55 | George Lansbury
(1859-1940) |
 |
1931 | 5 December 1931 | 6 September 1935 | Labour | Lansbury |
| 56 | Arthur Henderson
(1863-1935) |
 |
- | 6 September 1935 | 20 October 1935 | Henderson | |
| 57 | Herbert Morrison
(1888-1965) |
 |
- | 20 October 1935 | 1 December 1937 | Morrison I | |
| 1936 | Morrison II | ||||||
| 58 | Clement Attlee
(1883-1967) |
 |
- | 1 December 1937 | 1 December 1957 | Attlee I | |
| 1940 | Attlee II | ||||||
| 1944 | Attlee III | ||||||
| 1948 | Attlee IV | ||||||
| 1953 | Attlee V | ||||||
| 59 | Alec Douglas-Home
(1903-1995) |
 |
1957 | 1 December 1957 | 2 December 1967 | Conservative | Douglas-Home I |
| 1961 | Douglas-Home II | ||||||
| 1964 | Douglas-Home III (Con–Lib) | ||||||
| 60 | Hugh Gaitskell
(1906-1985) |
 |
1967 | 2 December 1967 | 15 April 1973 | Labour | Gaitskell I |
| 1972 | Gaitskell II | ||||||
| 61 | James Callaghan
(1912-2005) |
 |
- | 15 April 1973 | 17 April 1977 | Callaghan | |
| 62 | Margaret Thatcher
(1925-2013) |
 |
1977 | 17 April 1977 | 4 July 1982 | Conservative | Thatcher |
| 63 | Michael Foot
(1913-2010) |
 |
1982 | 4 July 1982 | 6 July 1992 | Labour | Foot I |
| 1987 | Foot II | ||||||
| 64 | John Major
(1943-) |
 |
1992 | 4 July 1992 | 27 September 1994 | Conservative | Major |
| 65 | Paddy Ashdown
(1941-2018) |
 |
1994 | 27 September 1994 | 24 August 2001 | Liberal Democrat | Ashdown I |
| 1999 | Ashdown II | ||||||
| 66 | Charles Kennedy
(1959-) |
 |
- | 24 August 2001 | 7 January 2006 | Kennedy I | |
| 2004 | Kennedy II | ||||||
| 67 | Vince Cable
(1943-) |
 |
- | 7 January 2006 | 31 March 2009 | Cable | |
| 68 | David Davis
(1948-) |
 |
2009 | 31 March 2009 | 31 March 2019 | Conservative | Davis I |
| 2014 | Davis II | ||||||
| 2015 | Davis III | ||||||
| 69 | William Hague
(1961-) |
 |
- | 31 March 2019 | 1 April 2020 | Hague | |
| 70 | Sarah Owen
(1983-) |
 |
2020 | 1 April 2020 | 9 April 2023 | Labour | Owen |
| 71 | Emily Thornberry
(1960-) |
 |
- | 9 April 2023 | Incumbent | Thornberry I | |
| 2023 | Thornberry II |
| ||||||||||||||||||
