Records of Prime Ministers of the United Kingdom Wilmington to Theresa May) University college with most alumni Prime MinistersChrist Church, Oxford13 (George Grenville to Sir Alec Douglas-Home) Vocational institution with most Prime Ministers as studentsThe Inns of Court11 (Lord Wilmington to Tony Blair). Of these, eight passed through Lincoln's Inn (William Pitt the Younger to Tony Blair). The first Prime Minister never to have been a university graduate was the Duke of Devonshire (served 1756–57), the last (as of ) was John Major (served 1990–97). The earliest Prime Minister to be an armed forces veteran was Henry Pelham, Prime Minister in 1743–54, who had served as a volunteer
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