Sir Robert Walpole	Whig	Apr. 1721	PICTURE
Earl of Wilmington	Whig	Feb. 1741
Henry Pelham	Whig	Aug. 1743
Duke of Newcastle	Whig	Mar. 1754
Duke of Devonshire	Whig	Nov. 1756
Duke of Newcastle	Whig	July 1797
Earl of Bute	Tory	May 1762
George Grenville	Whig	Apr. 1763
Marquess of Rockingham	Whig	July 1765
Earl of Chatham	Whig	July 1766	PICTURE
Duke of Grafton	Whig	Oct. 1768
Lord North	Tory	Jan. 1770	PICTURE
Marquess of Rockingham	Whig	Mar. 1782
Earl of Shelburne	Whig	July 1782
Duke of Portland	Coalition	Apr. 1783
William Pitt	Tory	Dec. 1783
Henry Addington	Tory	Mar. 1801
William Pitt	Tory	May 1804	PICTURE
William Wyndham Grenville	Whig	Feb. 1806
Duke of Portland	Tory	Mar. 1807
Spencer Perceval	Tory	Oct. 1809
Earl of Liverpool	Tory	June 1812
George Canning	Tory	Apr. 1827
Viscount Goderich	Tory	Aug. 1827
Duke of Wellington	Tory	Jan. 1828	PICTURE
Earl Grey	Whig	Nov. 1830	PICTURE
Viscount Melbourne	Whig	July 1834
Duke of Wellington	Tory	Nov. 1834
Sir Robert Peel	Conservative	Dec. 1834
Viscount Melbourne	Whig	April. 1835	PICTURE
Sir Robert Peel	Conservative	April. 1841	PICTURE
Lord John Russell	Whig	June 1846
Earl of Derby	Conservative	Feb. 1852
Earl of Aberdeen	Coalition	Dec. 1855
Viscount Palmerston	Liberal	Feb. 1855
Earl of Derby	Conservative	Feb. 1859
Viscount Palmerston	Liberal	June 1859	PICTURE
Earl Russell	Liberal	Oct. 1865
Earl of Derby	Conservative	June 1866
Benjamin Disraeli	Conservative	Feb. 1868	PICTURE
William Ewart Gladstone	Liberal	Dec. 1868	PICTURE 1
Benjamin Disraeli	Conservative	Feb. 1874	PICTURE
William Ewart Gladstone	Liberal	April 1880	PICTURE 2
Marquess of Salisbury	Conservative	June. 1885
William Ewart Gladstone	Liberal	Feb. 1886
Marquess of Salisbury	Conservative	July. 1886
William Ewart Gladstone	Liberal	Aug. 1892
Earl of Rosebery	Liberal	Mar. 1894
Marquess of Salisbury	Conservative	June. 1895
Arthur James Balfour	Conservative	July. 1902
Sir Henry Campbell Bannerman	Liberal	Dec. 1905
Herbert Henry Asquith	Liberal	April 1908
David Lloyd George	Coalition	Dec. 1916	PICTURE
Andrew Bonar Law	Conservative	Oct. 1922
Stanley Baldwin	Conservative	May. 1923	PICTURE
James Ramsay Mac Donald	Labour	Jan. 1924	PICTURE
Stanley Baldwin	Conservative	Nov. 1924
James Ramsay Mac Donald	Coalition	June. 1929
Stanley Baldwin	Coalition	June. 1935
Neville Chamberlain	Coalition	May. 1937	PICTURE
Winston Spencer Churchill	Coalition	May. 1940	PICTURE 1
Clement Richard Attlee	Labour	July. 1945	PICTURE
Winston Spencer Churchill	Conservative	Oct. 1951	PICTURE 2
Sir Anthony Eden	Conservative	Apr. 1955
Harold Macmillan	Conservative	Jan. 1957	PICTURE
Sir Alec Douglas-Home	Conservative	Oct. 1957
Harold Wilson	Labour	Oct. 1964
Edward Heath	Conservative	June. 1970
Harold Wilson	Labour	March. 1974	PICTURE
James Callaghan	Labour	April. 1976
Margaret Thatcher	Conservative	May. 1979	PICTURE
John Major	Conservative	Nov. 1990	PICTURE
Tony Blair	Labour	May.1997	PICTURE
Tony Blair	Labour	June. 2001