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
Records of Prime Ministers of the United Kingdom 10 February 1746 but returned to office two days later (12 February) when Lord Bath had been invited to form a ministry but failed to do so. The shortest interval where an intervening ministry had been formed was achieved by Lord Melbourne, who was out of office after being dismissed on 14 November 1834 but returned following the end of successor Sir Robert Peel's first ministry on 18 April 1835155 days (under six months) later. Of all Prime Ministers, only two have been female. Both were Conservative Party leaders. Two Prime Ministers were born in Ireland: Bonar Law was born