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| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER |
| 1800 | 2 july | United Kingdom of Great Britain and Ireland | king George III | Henry Addington |
| 1801 | 14 march | Henry Addington | ||
| 1804 | 10 may | William Pitt the Younger (II) | ||
| 1806 | 11 february | William Wyndham Grenville, Baron Grenville | ||
| 1807 | 31 march | William Henry Cavendish-Bentinck, Duke of Portland (I) | ||
| 1809 | 4 october | Spencer Perceval | ||
| 1812 | 9 june | Robert Banks Jenkinson, Earl of Liverpool | ||
| 1820 | 29 january | king George IV | ||
| 1827 | 10 april | Geroge Canning | ||
| 1827 | 31 august | Frederick John Robinson, Viscount Goderich | ||
| 1828 | 22 january | Arthur Wellesley, Duke of Wellington (I) | ||
| 1830 | 26 june | king Willelm IV | ||
| 1830 | 22 november | Charles Grey, Earl Grey | ||
| 1834 | 16 july | William Lamb, Viscount Melbourne (I) | ||
| 1834 | 17 november | Arthur Wellesley, Duke of Wellington (II) | ||
| 1834 | 10 december | Sir Robert Peel (I) | ||
| 1835 | 18 april | William Lamb, Viscount Melbourne (I) | ||
| 1837 | 20 june | queen Victoria | ||
| 1841 | 30 august | Sir Robert Peel (I) | ||
| 1846 | 6 july | John Russell, Lord Russell (I) | ||
| 1852 | 23 february | Edward Geoffrey Stanley, Earl of Derby (I) | ||
| 1852 | 19 december | George Hamilton-Gordon, Earl of Aberdeen | ||
| 1855 | 10 february | Henry John Temple, Viscount Palmerston (I) | ||
| 1858 | 25 february | Edward Geoffrey Stanley, Earl of Derby (II) | ||
| 1859 | 18 june | Henry John Temple, Viscount Palmerston (II) | ||
| 1865 | 30 october | John Russell, Earl Russell (II) | ||
| 1866 | 6 july | Edward Geoffrey Stanley, Earl of Derby (III) | ||
| 1868 | 27 february | Benjamin Disraeli (I) | ||
| 1868 | 3 december | William Ewart Gladstone (I) | ||
| 1874 | 20 february | Benjamin Disraeli, Earl of Beaconsfield (II) | ||
| 1880 | 23 april | William Ewart Gladstone (II) | ||
| 1885 | 24 june | Robert Arthur Talbot Gascoyne-Cecil, Marquess of Salisbury (I) | ||
| 1886 | 1 february | William Ewart Gladstone (III) | ||
| 1886 | 3 august | Robert Arthur Talbot Gascoyne-Cecil, Marquess of Salisbury (II) | ||
| 1892 | 18 august | William Ewart Gladstone (III) | ||
| 1894 | 6 march | Archibald Primrose, Earl of Rosebery | ||
| 1895 | 25 june | Robert Arthur Talbot Gascoyne-Cecil, Marquess of Salisbury (II) | ||
| 1901 | 22 january | dinasty Saxe-Coburgo-Gotha | king Edward VII | |
| 1902 | 12 july | Arthur James Balfour | ||
| 1905 | 5 december | Sir Henry Campbell-Bannerman | ||
| 1908 | 7 april | Herbert Henry Asquith | ||
| 1910 | 7 naggio | king George V | ||
| 1916 | 7 december | David Lloyd George | ||
| 1922 | 23 october | Andrew Bonar Law | ||
| 1923 | 22 may | Stanley Baldwin (I) | ||
| 1924 | 22 january | Ramsay MacDonald (I) | ||
| 1924 | 4 november | Stanley Baldwin (II) | ||
| 1929 | 5 june | Ramsay MacDonald (II) | ||
| 1935 | 7 june | Stanley Baldwin (III) | ||
| 1936 | 20 january | king Edward VIII | ||
| 1936 | 11 december | king George VI | ||
| 1937 | 28 may | Neville Arthur Chamberlain | ||
| 1940 | 10 may | Winston Churchill (I) | ||
| 1945 | 26 july | Clement Richard Attlee | ||
| 1951 | 26 october | Sir Winston Churchill (II) | ||
| 1952 | 6 february | queen Elisabeth II | ||
| 1955 | 6 april | Sir Robert Anthony Eden | ||
| 1957 | 10 january | Maurice Harold Macmillan | ||
| 1963 | 19 october | Sir Alec Douglas-Home | ||
| 1964 | 16 october | James Harold Wilson (I) | ||
| 1970 | 23 june | Edward Richard George Heath | ||
| 1974 | 4 march | James Harold Wilson(II) | ||
| 1976 | 5 april | Leonard James Callaghan | ||
| 1979 | 4 may | Margaret Roberts Thatcher | ||
| 1990 | 28 november | John Roy Major | ||
| 1997 | 2 may | Anthony Charles Lynton Blair | ||
| 2007 | 27 june | James Gordon Brown | ||
| 2010 | 21 may | David William Donald Cameron | ||
| 2016 | 12 july | Theresa Mary May | ||
| 2019 | 24 july | Alexander Boris de Pfeffel Johnson | ||
| 2022 | 6 september | Mary Elizabeth Truss | ||
| 2022 | 8 september | king Charles III | ||
| 2022 | 24 october | Rishi Sunak | ||
| 2022 | 5 july | Sir Keir Starmer |