Records of Prime Ministers of the United Kingdom of . From oldest to youngest: The most recent death of a former Prime Minister was that of Baroness Thatcher (served 1979–90) on 8 April 2013 (aged 87 years, 177 days). Seven Prime Ministers have died in office: Spencer Perceval is the only British Prime Minister to have been assassinated. Sir Robert Peel, Margaret Thatcher and John Major survived assassination attempts in 1843, 1984 and 1991 respectively. Sir Henry Campbell-Bannerman and Bonar Law each resigned during their respective final illnesses. Law died five months after his resignation, but Campbell-Bannerman lived only another 19 days, dying at 10 Downing Street, the
Historical rankings of Prime Ministers of the United Kingdom judged to be Anthony Eden. Historian Francis Beckett ranked the 20th-century prime ministers with points out of five in 2006, based on how well the leaders implemented their policies—not on the policies themselves. Margaret Thatcher and Clement Attlee shared the highest ranking. In September 2008 the BBC "Newsnight" programme conducted an online poll. Asking voters to decide who they thought was the greatest and worst of post-war prime ministers. 27,000 people responded, and decided that Winston Churchill was the greatest, with Attlee second. The full results were: In a BBC poll to find the 100 Greatest Britons in 2002, five