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 returning in that of 1950 more than four years later. Of parliamentary constituencies that have been represented, none have been represented by more than one serving Prime Minister. Four future Prime Ministers sat for Newport, Isle of Wight (constituency abolished 1832): Lord Palmerston and Sir Arthur Wellesley (later the Duke of Wellington) in 1807–09, George Canning in 1826–27 and William Lamb, later Lord Melbourne in April–May 1827. It is rare for veteran Prime Ministers sitting in the Commons to lose seats through electoral defeat at subsequent general elections. Those who have are: Five Prime Ministers through longest unbroken service became