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
Historical rankings of Prime Ministers of Canada Historical rankings of Prime Ministers of Canada Historical rankings of Canadian prime ministers are surveys conducted in order to construct rankings of the success of individuals who have served as Prime Minister of Canada. Ranking systems are usually based on surveys of academic historians, economists and political scientists. The rankings focus on the achievements, leadership qualities, failures and faults in office. "Note: Click the "sort" icon at the head of each column to view the rankings for each survey in numerical order." Sequence listed by first term as Prime Minister <nowiki>*</nowiki> Ranking calculated before the prime minister had left office