Prime Minister of the United Kingdom

• 14-February-1743 : Henry Pelham becomes British Prime Minister.
• 27-March-1782 : Charles Watson-Wentworth, 2nd Marquess of Rockinghamf Rockinghambecomes Prime Minister of the United Kingdom.
• 09-January-1799 : British Prime Minister William Pitt the Younger introduces an income tax of two shillings to the pound to raise funds for Great Britain's war effort in the Napoleonic Wars.
• 04-February-1801 : William Pitt the Younger resigns as Prime Minister of the United Kingdom.
• 26-April-1804 : Henry Addington resigns as Prime Minister of the United Kingdom.
• 10-May-1804 : William Pitt the Younger begins his second term as Prime Minister of the United Kingdom.
• 23-January-1806 : Grenville succeeds William Pitt the Younger as wartime Prime Minister of the United Kingdom, upon Pitt's death this day amidst worsening health caused by the stresses of the Napoleonic Wars
• 10-April-1827 : UK: George Canning succeeds Lord Liverpool as British Prime Minister.
• 22-January-1828 : UK: The Duke of Wellington succeeds Lord Goderich as Prime Minister of the United Kingdom.
• 29-January-1855 : Lord Aberdeen resigns as Prime Minister of the United Kingdom over the management of the Crimean War.