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 Commons MP, when known as Lord John Russell (as younger son of a Duke of Bedford) in 1846–52, and his second and last entirely as a member of the Lords as the 1st Earl Russell in 1865–66, having been raised to the peerage between terms in 1861. Without counting Lord Russell, eighteen Prime Ministers served their entire terms from the House of Lords where they were already members, chronologically: <nowiki>*</nowiki> These five Prime Ministers never served in the House of Commons during their political careers. Three Prime Ministers were elevated from the Commons to the House of Lords during their