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For pre-1721 elected parliaments see List of Parliaments of England.
| Party |
Prime Minister(s) |
Date |
Notes |
| Whig |
Robert Walpole |
1721-1742 |
generally regarded as being the first Prime Minister of Great Britain |
| Whig |
The Earl of Wilmington |
1742-1743 |
|
| Whig |
Henry Pelham |
1743-1754 |
|
| Whig |
The Duke of Newcastle |
1754-1756 |
|
| Whig |
The Duke of Devonshire |
1756-1757 |
|
| Whig |
The Duke of Newcastle |
1757-1762 |
|
| Tory |
The Earl of Bute |
1762 |
|
| Whig |
George Grenville |
1763-1765 |
|
| Whig |
2nd Marquess of Rockingham |
1765-1766 |
|
| Whig |
William Pitt, 1st Earl of Chatham |
1766-1768 |
the Elder |
| Whig |
3rd Duke of Grafton |
1768-1770 |
|
| Tory |
Lord North |
1770-1782 |
|
| Whig |
2nd Marquess of Rockingham |
1782 |
|
| Whig |
2nd Earl of Shelburne |
1782-1783 |
|
| Whig |
William Henry Cavendish-Bentinck, 3rd Duke of Portland |
1783 |
|
| Tory |
William Pitt |
1783-1801 |
the Younger |
| Tory |
Henry Addington |
1801-1804 |
|
| Tory |
William Pitt |
1804-1806 |
the Younger |
| Whig |
Lord Grenville |
1806-1807 |
|
| Tory |
The Duke of Portland |
1807-1809 |
|
| Tory |
Spencer Perceval |
1809-1812 |
the only British Prime Minister to have been assassinated |
| Tory |
Lord Liverpool |
1812-1827 |
|
| Tory |
George Canning |
1827 |
|
| Tory |
Lord Goderich |
1827-1828 |
|
| Tory |
The Duke of Wellington |
1828-1830 |
|
| Whig |
The Earl Grey, The Viscount Melbourne |
1830-1834 |
|
| Conservative Provisional |
The Duke of Wellington |
1834 |
|
| Conservative |
Sir Robert Peel |
1834-1835 |
|
| Whig |
The Viscount Melbourne |
1835-1841 |
|
| Conservative |
Sir Robert Peel |
1841-1846 |
|
| Whig |
Lord John Russell |
1846-1852 |
|
| Conservative |
The Earl of Derby |
1852 |
|
| Coalition |
The Earl of Aberdeen |
1852-1855 |
|
| Palmerston |
The Viscount Palmerston |
1855-1858 |
|
| Conservative |
The Earl of Derby |
1858-1859 |
|
| Liberal |
The Viscount Palmerston, The Earl Russell |
1859-1866 |
|
| Conservative |
The Earl of Derby, Benjamin Disraeli |
1866-1868 |
|
| Liberal |
William Ewart Gladstone |
1868-1874 |
|
| Conservative |
Benjamin Disraeli |
1874-1880 |
|
| Liberal |
William Ewart Gladstone |
1880-1885 |
|
| Conservative |
The Marquess of Salisbury |
1885-1886 |
|
| Liberal |
William Ewart Gladstone |
1886 |
|
| Conservative |
The Marquess of Salisbury |
1886-1892 |
|
| Liberal |
William Ewart Gladstone, The Earl of Rosebery |
1892-1895 |
|
| Conservative |
The Marquess of Salisbury, Arthur Balfour |
1895-1905 |
|
| Liberal |
Henry Campbell-Bannerman, Herbert Henry Asquith |
1905-1915 |
Longest-lasting Liberal or Whig government |
| Coalition |
Herbert Henry Asquith |
1915-1916 |
|
| Coalition |
David Lloyd George |
1916-1922 |
|
| Conservative |
Andrew Bonar Law, Stanley Baldwin |
1922-1924 |
|
| Labour |
James Ramsay MacDonald |
1924 |
|
| Conservative |
Stanley Baldwin |
1924-1929 |
|
| Labour |
James Ramsay MacDonald |
1929-1931 |
|
| National |
James Ramsay MacDonald |
1931-1935 |
|
| National |
Stanley Baldwin, Neville Chamberlain |
1935-1940 |
|
| Coalition |
Winston Churchill |
1940-1945 |
|
| Caretaker |
Winston Churchill |
1945 |
|
| Labour |
Clement Attlee |
1945-1951 |
|
| Conservative |
Winston Churchill, Sir Anthony Eden |
1951-1957 |
|
| Conservative |
Harold Macmillan, Sir Alec Douglas-Home |
1957-1964 |
|
| Labour |
Harold Wilson |
1964-1970 |
|
| Conservative |
Edward Heath |
1970-1974 |
|
| Labour |
Harold Wilson |
1974-1976 |
|
| Labour |
Jim Callaghan |
1976-1979 |
Loss of motion of no confidence precipitated an election |
| Conservative |
Margaret Thatcher |
1979-1990 |
Thatcher resigned in November 1990, longest-lasting Conservative government |
| Conservative |
John Major |
1990-1997 |
Election called close to five year limit of parliament |
| Labour |
Tony Blair |
1997-2007 |
Longest-lasting Labour government |
| Labour |
Gordon Brown |
2007-Present |
Succeeded Blair after Blair's resignation |
