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
Living Prime Ministers of New Zealand but he declined to participate in the series. In 2017, four of the then-six former PMs spoke jointly about increasing refugee immigration to New Zealand. There have been four time periods when there was only one living Prime Minister, first with the appointment of Henry Sewell in 1856 and most recently during the second term of Keith Holyoake following the 1968 death of Walter Nash. There have been two time periods when 12 living current or former prime ministers co-existed, with the longest being a three-year period beginning with the first appointment of Robert Stout in 1884. The most recent