Sir Robert Walpole (W) 1721-1742
Earl of Wilmington (W) 1742-1743
Henry Pelham (W) 1743-1754
Duke of Newcastle (W) 1754-1756
Duke of Devonshire (W) 1756-1757
Duke of Newcastle (W) 1757-1762
Earl of Bute (T) 1762-1763
George Grenville (W) 1763-1765
Marquess of Rockingham (W) 1765-1766
William Pitt the Elder (Earl of Chatham) (W) 1766-1768
Duke of Grafton (W) 1768-1770
Frederick North (Lord North) (T) 1770-1782
Marquess of Rockingham (W) 1782
Earl of Shelburne (W) 1782-1783
Duke of Portland (Col) 1783
William Pitt the Younger (T) 1783-1801
Henry Addington (T) 1801-1804
William Pitt the Younger (T) 1804-1806
William Wyndham Grenville, Baron Grenville (W) 1806-1807
Duke of Portland (T) 1807-1809
Spencer Perceval (T) 1809-1812
Earl of Liverpool (T) 1812-1827
George Canning (T) 1827
Viscount Goderich (T) 1827-1828
Duke of Wellington (T) 1828-1830
Earl Grey (W) 1830-1834
Viscount Melbourne (W) 1834
Sir Robert Peel (T) 1834-1835
Viscount Melbourne (W) 1835-1841
Sir Robert Peel (T) 1841-1846
Lord John Russell (later Earl) (W) 1846-1852
Earl of Derby (T) 1852
Earl of Aberdeen (P) 1852-1855
Viscount Palmerston (L) 1855-1858
Earl of Derby (C) 1858-1859
Viscount Palmerston (L) 1859-1865
Earl Russell (L) 1865-1866
Earl of Derby (C) 1866-1868
Benjamin Disraeli (C) 1868
William E. Gladstone (L) 1868-1874
Benjamin Disraeli (C) 1874-1880
William E. Gladstone (L) 1880-1885
Marquess of Salisbury (C) 1885-1886
William E. Gladstone (L) 1886
Marquess of Salisbury (C) 1886-1892
William E. Gladstone (L) 1892-1894
Earl of Rosebery (L) 1894-1895
Marquess of Salisbury (C) 1895-1902
Arthur J. Balfour (C) 1902-1905
Sir Henry Campbell-Bannerman (L) 1905-1908
Herbert H. Asquith (L) 1908-1915
Herbert H. Asquith (Col) 1915-1916
David Lloyd George (Col) 1916-1922
Andrew Bonar Law (C) 1922-1923
Stanley Baldwin (C) 1923-1924
James Ramsay MacDonald (La) 1924
Stanley Baldwin (C) 1924-1929
James Ramsay MacDonald (La) 1929-1931
James Ramsay MacDonald (Col) 1931-1935
Stanley Baldwin (Col) 1935-1937
Neville Chamberlain (Col) 1937-1940
Winston Churchill (Col) 1940-1945
Winston Churchill (C) 1945
Clement Attlee (La) 1945-1951
Sir Winston Churchill (C) 1951-1955
Sir Anthony Eden (C) 1955-1957
Harold Macmillan (C) 1957-1963
Sir Alec Douglas-Home (C) 1963-1964
Harold Wilson (La) 1964-1970
Edward Heath (C) 1970-1974
Harold Wilson (La) 1974-1976
James Callaghan (La) 1976-1979
Margaret Thatcher (C) 1979-1990
John Major (C) 1990- 1997
Tony Blair (La) 1997-
