Records of Prime Ministers of the United Kingdom the middle name until the 1980s.) The richest Prime Minister was Lord Derby, with a personal fortune of over £7 million (about £444 million in today's money). The poorest was William Pitt the Younger, who was £40,000 (now over £1 million) in debt by 1800. Three Prime Ministers ultimately died as a result of accidents: Records of Prime Ministers of the United Kingdom The article lists the records of Prime Ministers of Great Britain and of the United Kingdom since 1721. The Prime Minister with the longest single term was Sir Robert Walpole, lasting 20 years and 315 days from
Records of Prime Ministers of the United Kingdom April 1770) was 67 days senior to Lord Liverpool (born 7 June 1770), whom he succeeded after Liverpool retired in 1827. Canning and Liverpool were one of four pairs of immediately consecutive Prime Ministers who shared a same birth year, the others being: The decade of the 1730s was the most productive for births of five future Prime MinistersLord Rockingham (born 1730, served 1765–66 and 1782), Lord North (born 1732, served 1770–82), the Duke of Grafton (born 1735, served 1768–70), Lord Shelburne (born 1737, served 1782–83) and the Duke of Portland (1738, served 1783 and 1807–09). The longest-lived Prime Minister