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
Commonwealth Prime Ministers' Conference Commonwealth Prime Ministers' Conference Commonwealth Prime Ministers' Conferences were biennial meetings of Prime Ministers of the United Kingdom and the Dominion members of the British Commonwealth of Nations. Seventeen Commonwealth Prime Ministers' Conferences were held between 1944 and 1969. As well, the prime ministers met for a Commonwealth Economic Conference in 1952. These series of conferences were a continuation and regularisation of the earlier Imperial Conferences which had been held periodically from 1887 to 1937. Since 1971, Commonwealth Heads of Government Meetings have been held. Of the seventeen meetings, sixteen were held in London, reflecting then-prevailing views of the Commonwealth