| 927 | Kingdom of England | Leaders | |
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| 3 Apr 1603 | personal union with Kingdom of Scotland | Leaders | |
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| 12 May 1707 | United Kingdom of Great Britain | Leaders | |
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| 1 Jan 1801 | United Kingdom of Great Britain and Ireland | Leaders | |
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| 12 Apr 1927 | United Kingdom of Great Britain and Northern Ireland | Leaders | |
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| 23 Feb 1689 - 19 Mar 1702 | William III | Orange dynasty | |
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| 23 Feb 1689 - 7 Jan 1695 | Mary II (f) | Stuart dynasty | |
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| 19 Mar 1702 - 12 Aug 1714 | Anne (f) | Stuart dynasty | |
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| 12 Aug 1714 - 22 Jun 1727 | George I | Hanover dynasty | |
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| 22 Jun 1727 - 25 Oct 1760 | George II | Hanover dynasty | |
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| 26 Oct 1760 - 29 Jan 1820 | George III | Hanover dynasty | |
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| 29 Jan 1820 - 26 Jun 1830 | George IV | Hanover dynasty | |
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| 26 Jun 1830 - 20 Jun 1837 | William IV | Hanover dynasty | |
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| 20 Jun 1837 - 22 Jan 1901 | Victoria (f) | Hanover dynasty | |
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| 22 Jan 1901 - 6 May 1910 | Edward VII | Hanover dynasty | |
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| 6 May 1910 - 20 Jan 1936 | George V | Hanover dynasty | |
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| 20 Jan 1936 - 11 Dec 1936 | Edward VIII | Hanover dynasty | |
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| 11 Dec 1936 - 6 Feb 1952 | George VI | Hanover dynasty | |
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| 6 Feb 1952 - | Elizabeth II (f) | Hanover dynasty | |
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| 26 May 1730 - 22 Feb 1742 | Sir Robert Walpole | Prime ministers² | Whg |
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| 27 Feb 1742 - 13 Jul 1743 | Spencer Compton, Earl of Wilmington Whg (b. 1673? - d. 1743) | Prime ministers² | |
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| 7 Sep 1743 - 6 Mar 1754 | Henry Pelham | Prime ministers² | Whg |
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| 16 Mar 1754 - 16 Nov 1756 | Thomas Pelham-Holles, Duke of Newcastle (1st time) Whg (b. 1693 - d. 1768) | Prime ministers² | |
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| 16 Nov 1756 - 2 Jul 1757 | William Cavendish, Duke of Devonshire Whg (b. 1720 - d. 1764) | Prime ministers² | |
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| 2 Jul 1757 - 26 May 1762 | Thomas Pelham-Holles, Duke of Newcastle (2nd time) Whg (s.a.) | Prime ministers² | |
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| 26 May 1762 - 16 Apr 1763 | John Stuart, Earl of Bute | Prime ministers² | |
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| 16 Apr 1763 - 13 Jul 1765 | George Grenville | Prime ministers² | |
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| 13 Jul 1765 - 30 Jul 1766 | Charles Watson-Wentworth, Marquess of Rockingham | Prime ministers² | |
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| 30 Jul 1766 - 14 Oct 1768 | William Pitt, Earl of Chatham | Prime ministers² | |
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| 14 Oct 1768 - 28 Jan 1770 | Augustus Henry Fitzroy, Duke of Grafton (b. 1735 - d. 1811) | Prime ministers² | |
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| 28 Jan 1770 - 22 Mar 1782 | Frederick North, Lord North | Prime ministers² | |
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| 27 Mar 1782 - 1 Jul 1782 | Charles Watson-Wentworth, Marquess of Rockingham | Prime ministers² | |
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| 4 Jul 1782 - 2 Apr 1783 | William Petty-Fitzmaurice, Earl of Shelburne (b. 1737 - d. 1805) | Prime ministers² | |
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| 2 Apr 1783 - 19 Dec 1783 | William Henry Cavendish Bentinck, Duke of Portland | Prime ministers² | |
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| 19 Dec 1783 - 14 Mar 1801 | William Pitt the Younger | Prime ministers² | |
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| 17 Mar 1801 - 10 May 1804 | Henry Addington | Prime ministers² | Tor |
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| 10 May 1804 - 23 Jan 1806 | William Pitt the Younger | Prime ministers² | |
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| 11 Feb 1806 - 31 Mar 1807 | William Wyndham Grenville, Baron Grenville (b. 1759 - d. 1834) | Prime ministers² | |
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| 31 Mar 1807 - 4 Oct 1809 | William Henry Cavendish Bentinck, Duke of Portland | Prime ministers² | |
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| 4 Oct 1809 - 11 May 1812 | Spencer Perceval | Prime ministers² | Tor |
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| 8 Jun 1812 - 12 Apr 1827 | Robert Banks Jenkinson, Earl of Liverpool Tor (b. 1770 - d. 1828) | Prime ministers² | |
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| 12 Apr 1827 - 8 Aug 1827 | George Canning | Prime ministers² | Tor |
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| 31 Aug 1827 - 22 Jan 1828 | Frederick John Robinson, Viscount Goderich Tor (b. 1782 - d. 1859) | Prime ministers² | |
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| 22 Jan 1828 - 22 Nov 1830 | Arthur Wellesley, Duke of Wellington (1st time) Tor (b. 1769 - d. 1852) | Prime ministers² | |
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| 22 Nov 1830 - 16 Jul 1834 | Charles Grey, Earl Grey | Prime ministers² | Whg |
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| 16 Jul 1834 - 17 Nov 1834 | William Lamb, Viscount Melbourne (1st time) Whg (b. 1779 - d. 1848) | Prime ministers² | |
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| 17 Nov 1834 - 10 Dec 1834 | Arthur Wellesley, Duke of Wellington (2nd time) Tor (s.a.) | Prime ministers² | |
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| 10 Dec 1834 - 18 Apr 1835 | Sir Robert Peel (1st time) | Prime ministers² | Tor |
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| 18 Apr 1835 - 30 Aug 1841 | William Lamb, Viscount Melbourne (2nd time) Whg (s.a.) | Prime ministers² | |
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| 30 Aug 1841 - 30 Jun 1846 | Sir Robert Peel (2nd time) | Prime ministers² | Con |
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| 30 Jun 1846 - 23 Feb 1852 | Lord John Russell (1st time) | Prime ministers² | Lib |
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| 23 Feb 1852 - 19 Dec 1852 | Edward Geoffrey Stanley, Earl of Derby (1st time) Con (b. 1799 - d. 1869) | Prime ministers² | |
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| 19 Dec 1852 - 6 Feb 1855 | George Hamilton-Gordon, Earl of Aberdeen (b. 1784 - d. 1860) | Prime ministers² | |
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| 6 Feb 1855 - 20 Feb 1858 | Henry John Temple, Viscount Palmerston (1st time) Lib (b. 1784 - d. 1865) | Prime ministers² | |
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| 20 Feb 1858 - 12 Jun 1859 | Edward Geoffrey Stanley, Earl of Derby (2nd time) Con (s.a.) | Prime ministers² | |
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| 12 Jun 1859 - 18 Oct 1865 | Henry John Temple, Viscount Palmerston (2nd time) Lib (s.a.) | Prime ministers² | |
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| 29 Oct 1865 - 28 Jun 1866 | John Russell, Earl Russell | Prime ministers² | |
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| 28 Jun 1866 - 27 Feb 1868 | Edward Geoffrey Stanley, Earl of Derby (3rd time) Con (s.a.) | Prime ministers² | |
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| 27 Feb 1868 - 3 Dec 1868 | Benjamin Disraeli (1st time) | Prime ministers² | Con |
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| 3 Dec 1868 - 20 Feb 1874 | William Ewart Gladstone | Prime ministers² | |
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| 20 Feb 1874 - 23 Apr 1880 | Benjamin Disraeli, (from 12 Aug 1876) Earl of Beaconsfield (2nd time) Con (s.a.) | Prime ministers² | |
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| 23 Apr 1880 - 23 Jun 1885 | William Ewart Gladstone | Prime ministers² | |
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| 23 Jun 1885 - 1 Feb 1886 | Robert Arthur Talbot Gascoyne-Cecil, Marquess of Salisbury (1st time) Con (b. 1830 - d. 1903) | Prime ministers² | |
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| 1 Feb 1886 - 25 Jul 1886 | William Ewart Gladstone | Prime ministers² | |
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| 25 Jul 1886 - 15 Aug 1892 | Robert Arthur Talbot Gascoyne-Cecil, Marquess of Salisbury (2nd time) Con (s.a.) | Prime ministers² | |
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| 15 Aug 1892 - 5 Mar 1894 | William Ewart Gladstone | Prime ministers² | |
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| 5 Mar 1894 - 25 Jun 1895 | Archibald Primrose, Earl of Rosebery Lib (b. 1847 - d. 1929) | Prime ministers² | |
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| 25 Jun 1895 - 12 Jul 1902 | Robert Arthur Talbot Gascoyne-Cecil, Marquess of Salisbury (3rd time) Con (s.a.) | Prime ministers² | |
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| 12 Jul 1902 - 5 Dec 1905 | Arthur James Balfour | Prime ministers² | Con |
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| 5 Dec 1905 - 8 Apr 1908 | Sir Henry Campbell-Bannerman | Prime ministers² | Lib |
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| 8 Apr 1908 - 7 Dec 1916 | H.H. Asquith | Prime ministers² | Lib |
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| 7 Dec 1916 - 23 Oct 1922 | David Lloyd George | Prime ministers² | Lib |
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| 23 Oct 1922 - 22 May 1923 | Bonar Law | Prime ministers² | Con |
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| 22 May 1923 - 22 Jan 1924 | Stanley Baldwin (1st time) | Prime ministers² | Con |
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| 22 Jan 1924 - 4 Nov 1924 | Ramsay MacDonald (1st time) | Prime ministers² | Lab |
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| 4 Nov 1924 - 5 Jun 1929 | Stanley Baldwin (2nd time) | Prime ministers² | Con |
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| 5 Jun 1929 - 7 Jun 1935 | Ramsay MacDonald (2nd time) | Prime ministers² | Lab |
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| 7 Jun 1935 - 28 May 1937 | Stanley Baldwin (3rd time) | Prime ministers² | Con |
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| 28 May 1937 - 10 May 1940 | Neville Chamberlain | Prime ministers² | Con |
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| 10 May 1940 - 26 Jul 1945 | Winston Churchill (1st time) | Prime ministers² | Con |
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| 26 Jul 1945 - 26 Oct 1951 | Clement Attlee | Prime ministers² | Lab |
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| 26 Oct 1951 - 6 Apr 1955 | Winston Churchill (from 24 Apr 1953, Sir Winston Churchill) | Prime ministers² | |
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| 6 Apr 1955 - 10 Jan 1957 | Sir Anthony Eden | Prime ministers² | Con |
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| 10 Jan 1957 - 19 Oct 1963 | Harold Macmillan | Prime ministers² | Con |
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| 19 Oct 1963 - 16 Oct 1964 | Alexander Frederick Douglas-Home, Earl of Home Sir Alec Douglas-Home) Con (b. 1903 - d. 1995) | Prime ministers² | |
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| 16 Oct 1964 - 19 Jun 1970 | Harold Wilson (1st time) | Prime ministers² | Lab |
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| 19 Jun 1970 - 4 Mar 1974 | Edward Heath | Prime ministers² | Con |
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| 4 Mar 1974 - 5 Apr 1976 | Harold Wilson (2nd time) | Prime ministers² | Lab |
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| 5 Apr 1976 - 4 May 1979 | James Callaghan | Prime ministers² | Lab |
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| 4 May 1979 - 28 Nov 1990 | Margaret Thatcher (f) | Prime ministers² | Con |
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| 28 Nov 1990 - 2 May 1997 | John Major | Prime ministers² | Con |
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| 2 May 1997 - 27 Jun 2007 | Tony Blair | Prime ministers² | Lab |
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| 27 Jun 2007 - | Gordon Brown | Prime ministers² | Lab |
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