1721-1742
Robert Walpole (Whig)
1742-1743
Spencer Compton, Earl of Wilmington (Whig)
1743-1754
Henry Pelham (Whig)
1754-1756
Thomas Pelham-Holles, Duke of Newcastle (Whig)
1756-1757
William Cavendish, Duke of Devonshire (Whig)
1757-1762
Thomas Pelham-Holles, Duke of Newcastle (Whig)
1762-1763
John Stuart, Earl of Bute (Tory)
1763-1765
George Grenville (Whig)
1765-1766
Charles Watson Wentworth, Marquess of Rockingham (Whig)
1766-1768
William Pitt (the Elder), Earl of Chatham (Whig)
1768-1770
Augustus Fitzroy, Duke of Grafton (Whig)
1770-1782
Frederick North, Lord North (Tory)
1782
Charles Watson Wentworth, Marquess of Rockingham (Whig)
1782-1783
William Petty, Earl of Shelburne (Whig)
1783
William Cavendish-Bentinck, Duke of Portland (Whig)
1783-1801
William Pitt (the Younger) (Tory)
1801-1804
Henry Addington (Tory)
1804-1806
William Pitt (the Younger) (Tory)
1806-1807
William Wyndham Grenvill, Baron Grenville (Whig)
1807-1809
William Cavendish-Bentinck, Duke of Portland (Tory-Whig)
1809-1812
Spencer Perceval (Tory)
1812-1827
Robert Banks Jenkinson, Earl Liverpool (Tory)
1827-1827
George Canning (Tory)
1827-1828
Frederick John Robinson, Viscount Goderich (Tory)
1828-1830
Arthur Wellesley, Duke of Wellington (Tory)
1830-1834
Charles Grey, Earl Grey (Whig)
1834
William Lamb, Lord Melbourne (Whig)
1834
Arthur Wellesley, Duke of Wellington (Tory)
1834-1835
Robert Peel (Conservative)
1835-1841
William Lamb, Lord Melbourne (Whig)
1841-1846
Robert Peel (Conservative)
1846-1852
Lord John Russell (Whig)
1852
Edward Stanley-Smith, Earl of Derby (Conservative)
1852-1855
George Hamilton Gordon, Earl of Aberdeen (Peelite)
1855-1858
Henry John Temple, Viscount Palmerston (Whig)
1858-1859
Edward Stanley-Smith, Earl of Derby (Conservative)
1859-1865
Henry John Temple, Viscount Palmerston (Liberal)
1865-1866
Lord John Russell (Liberal)
1866-1868
Edward Stanley-Smith, Earl of Derby (Conservative)
1868
Benjamin Disreali (Conservative)
1868-1874
William Ewart Gladstone (Liberal)
1874-1880
Benjamin Disreali, Earl of Beaconsfield (Conservative)
1880-1885
William Ewart Gladstone (Liberal)
1885-1886
Robert Gascoyne-Cecil, Marquess of Salisbury (Conservative)
1886
William Ewart Gladstone (Liberal)
1886-1892
Robert Gascoyne-Cecil, Marquess of Salisbury (Conservative)
1892-1894
William Ewart Gladstone (Liberal)
1894-1895
Archibald Primrose, Earl of Rosebury (Liberal)
1985-1902
Robert Gascoyne-Cecil, Marquess of Salisbury (Conservative)
1902-1905
Arthur Balfour (Conservative)
1905-1908
Henry Campbell Bannerman (Liberal)
1908-1916
Herbert Henry Asquith (Liberal)
1916-1922
David Lloyd George (Liberal)
1922-1923
Andrew Bonar Law (Conservative)
1923-1924
Stanley Baldwin (Conservative)
1924-1924
Ramsay MacDonald (Labour)
1924-1929
Stanley Baldwin (Conservative)
1929-1935
Ramsay McDonald (Labour)
1935-1937
Stanley Baldwin (Conservative)
1937-1940
Neville Chamberlaine (Conservative)
1940-1945
Winston Churchill (Conservative)
1945-1951
Clement Atlee (Labour)
1951-1955
Winston Churchill (Conservative)
1955-1957
Anthony Eden (Conservative)
1957-1963
Harold McMillan (Conservative)
1963-1964
Alec Douglas Hume (Conservative)
1964-1970
Harold Wilson (Labour)
1970-1974
Edward Heath (Conservative)
1974-1976
Harold Wilson (Labour)
1976-1979
James Callaghan (Labour)
1979-1990
Margaret Thatcher (Conservative)
1990-1997
John Major (Conservative)
1997-2007
Tony Blair (Labour)
2007-2010
Gordon Brown (Labour)
2010-2016
David Cameron (Conservative)