18th Century Prime Ministers, period of office and political party

Sir Robert Walpole 1721-42 Whig
Spencer Compton, Earl of Wilmington 1742-3 Whig
Henry Pelham 1743-54 Whig
Thomas Pelham-Holles, Duke of Newcastle 1754-6 and 1757-62 Whig
William Cavendish, Duke of Devonshire 1756-7 Whig
John Stuart, Earl of Bute 1762-3 Tory
George Grenville 1763-5 Whig
Charles Wentworth, Marquess of Rockingham 1765-6 1782 Whig
The Earl of Chatham, William Pitt ‘The Elder’ 1766-8 Whig
Augustus Henry Fitzroy, Duke of Grafton 1768-70 Whig
Lord North 1770-82 Tory
William Petty, Earl of Shelburne 1782-3 Whig
William Bentinck, Duke of Portland 1783 and 1807-9 Whig

19th Century Prime Ministers, period of office and political party

William Pitt ‘The Younger’ 1783-1801 and 1804-6 Tory
Henry Addington 1801-4 Tory
William Wyndam Grenville, Lord Grenville 1806-7 Whig
Spencer Perceval 1809-12 Tory
Robert Banks Jenkinson, Earl of Liverpool 1812-27 Tory
George Canning 1827 Tory
Frederick Robinson, Viscount Goderich 1827-8 Tory
Arthur Wellesley, Duke of Wellington 1828-30 Tory
Earl Grey 1830-34 Whig
William Lamb, Viscount Melbourne 1834 and 1835-41 Whig
Sir Robert Peel 1834-5 and 1841-6 Tory
Earl Russell 1846-51 1865-6 Liberal
The Earl of Derby 1852, 1858-9 and 1866-8, Conservative
Earl of Aberdeen 1852-5 Tory
Viscount Palmerston 1855-8 and 1859-65 Liberal
Benjamin Disraeli 1868 and 1874-80 Conservative
William Ewart Gladstone 1868-74, 1880-85, 1886 and 1892-94 Liberal
Robert Gascoyne-Cecil, Marquess of Salisbury 1885-6, 1886-92 and 1895-1902 Conservative
The Earl of Rosebery 1894-5 Liberal

20th Century Prime Ministers, period of office and political party

Arthur James Balfour 1902-5 Conservative
Henry Campbell-Bannerman 1905-8 Liberal
Herbert Henry Asquith 1908-16 Liberal
David Lloyd George 1916-22 Liberal
Andrew Bonar Law 1922-3 Conservative
Stanley Baldwin 1923, 1924-9, 1935-7 Conservative
James Ramsay MacDonald 1924 and 1929-35 Labour
Arthur Neville Chamberlain 1937-40 Conservative
Sir Winston Leonard Spencer Churchill 1940-5 and 1951-5 Conservative
Clement Richard Attlee 1945-51 Labour
Anthony Eden 1955-7 Conservative
Harold Macmillan 1957-63 Conservative
Sir Alec Douglas-Home 1963-4 Conservative
Harold Wilson 1964-70 and 1974-6 Labour
Edward Heath 1970-4 Conservative
James Callaghan 1976-9 Labour
Margaret Thatcher 1979-90 Conservative
John Major 1990-97 Conservative
Tony Blair 1997-2007 Labour

21st Century Prime Ministers, period of office and political party

Gordon Brown 2007-2010 Labour