| Tenure | Terms | Party | Exit Reason | 1st year of office | Answer | % Correct |
|---|---|---|---|---|---|---|
| 50 days | 1 | Conservative | Resigned | 2022 | Truss | 98%
|
| 3 years, 44 days | 1 | Conservative | Resigned | 2019 | Johnson | 70%
|
| 3 years, 11 days | 1 | Conservative | Resigned | 2016 | May | 70%
|
| 10 years, 56 days | 1 | Labour | Resigned | 1997 | Blair | 68%
|
| 2 years, 318 days | 1 | Labour | Election | 2007 | Brown | 68%
|
| 6 years, 155 days | 1 | Conservative | Election | 1990 | Major | 65%
|
| 8 years, 239 days | 2 | Conservative | Resigned due to illness | 1940 | Churchill | 63%
|
| 11 years, 208 days | 1 | Conservative | Resigned | 1979 | Thatcher | 63%
|
| 6 years, 92 days | 1 | Labour | Election | 1945 | Attlee | 60%
|
| 6 years, 63 days | 1 | Conservative | Resigned | 2010 | Cameron | 60%
|
| 1 year, 279 days | 1 | Conservative | Resigned due to illness | 1955 | Eden | 60%
|
| 363 days | 1 | Conservative | Election | 1963 | Douglas-Home | 58%
|
| 20 years, 314 days | 1 | Whig | Resigned | 1721 | Walpole | 58%
|
| 211 days | 1 | Concervative | Resigneddue to illness | 1922 | Bonar Law | 55%
|
| 3 years, 259 days | 1 | Conservative | Election | 1970 | Heath | 55%
|
| 7 years, 279 days | 2 | Labour | Resigned | 1964 | Wilson | 55%
|
| 3 years, 29 days | 1 | Labour | Election | 1976 | Callaghan | 53%
|
| 6 years, 281 days | 1 | Conservative | Resigned | 1957 | Macmillan | 53%
|
| 2 years, 348 days | 1 | Conservative | Resigned | 1937 | Chamberlain | 50%
|
| 6 years, 289 days | 2 | Labour | Resigned due to illness | 1924 | MacDonald | 50%
|
| 8 years, 244 days | 1 | Liberal | Resigned | 1908 | Asquith | 48%
|
| 5 years, 317 days | 1 | Liberal | Resigned | 1916 | Lloyd George | 48%
|
| 18 years, 343 days | 2 | Tory | Died | 1783 | Pitt | 48%
|
| 119 days | 1 | Tory | Replaced | 1827 | Canning | 45%
|
| 12 years, 126 days | 4 | Liberal | Resigned | 1868 | Gladstone | 45%
|
| 2 years, 221 days | 1 | Tory | Assassinated | 1809 | Perceval | 45%
|
| 7 years, 82 days | 3 | Conservative | Resigned | 1923 | Baldwin | 43%
|
| 13 years, 252 days | 3 | Conservative | Resigned due to illness | 1885 | Gascoyne-Cecil | 38%
|
| 5 years, 57 days | 2 | Conservative | Resigned | 1834 | Peel | 38%
|
| 2 years, 122 days | 1 | Liberal | Resigned due to illness | 1905 | Campbell-Bannerman | 35%
|
| 3 years, 280 days | 3 | Conservative | Resigned due to illness | 1852 | Smith-Stanley | 35%
|
| 3 years, 145 days | 1 | Conservative | Resigned | 1902 | Balfour | 33%
|
| 6 years, 239 days | 2 | Conservative | Election | 1868 | Disraeli | 33%
|
| 14 years, 305 days | 1 | Tory | Resigned due to illness | 1812 | Jenkinson | 33%
|
| 144 days | 1 | Tory | Died | 1827 | Robinson | 33%
|
| 3 years, 82 days | 2 | Whig/Tory | Resigned due to illness | 1783 | Cavendish-Bentinck | 28%
|
| 2 years, 42 days | 1 | Peelite | Resigned | 1852 | Hamilton-Gordon | 28%
|
| 6 years, 255 days | 2 | Whig | Resigned | 1834 | Lamb | 28%
|
| 9 years, 141 days | 2 | Whig/Liberal | Died | 1855 | Temple | 28%
|
| 12 years, 58 days | 1 | Tory | Resigned | 1770 | North | 25%
|
| 10 years, 191 days | 1 | Whig | Died | 1743 | Pelham | 25%
|
| 7 years, 205 days | 2 | Whig | Replaced | 1754 | Pelham-Holles | 25%
|
| 2 years, 320 days | 2 | Tory | Replaced | 1828 | Wellesley | 25%
|
| 1 year, 119 days | 1 | Whig | Died | 1742 | Compton | 23%
|
| 2 years, 76 days | 1 | Whig | Resigned due to illness | 1766 | Pitt | 23%
|
| 6 years, 110 days | 2 | Whig/Liberal | Election | 1846 | Russell | 23%
|
| 1 year, 113 days | 2 | Whig | Died | 1765 | Watson-Wentworth | 23%
|
| 225 days | 1 | Whig | Replaced | 1756 | Cavendish | 20%
|
| 266 days | 1 | Whig | Replaced | 1782 | Fitzmaurice | 20%
|
| 1 year, 109 days | 1 | Liberal | Election | 1894 | Primrose | 20%
|
| 3 years, 229 days | 1 | Whig | Resigned | 1830 | Grey | 18%
|
| 317 days | 1 | Tory | Resigned | 1762 | Stuart | 18%
|
| 3 years, 54 days | 1 | Tory | Replaced | 1801 | Addington | 15%
|
| 1 year, 106 days | 1 | Whig | Resigned | 1768 | Fitzroy | 15%
|
| 2 years, 85 days | 1 | Whig | Replaced | 1763 | Grenville | 15%
|
| 1 year, 42 days | 1 | Whig | Replaced | 1806 | Grenville | 13%
|