Records of Prime Ministers of the United Kingdom transitions between reigns, eight Prime Ministers each served under two sovereigns: George III had 14 Prime Ministers serving during his 59-year reign (reigned 1760–1820), beginning with the Duke of Newcastle. The last incumbent, Lord Liverpool, was the only one appointed by his son (the Prince Regent) during the father's final incapacity to rule. In downward numerical order, numbers of Prime Ministers in office during other reigns are: Only six Prime Ministers came to serve office under sovereigns in whose own reigns they were born. The present Prime Minister, Theresa May, is the third Prime Minister to have been born in
Commonwealth Prime Ministers' Conference Commonwealth Prime Ministers' Conference Commonwealth Prime Ministers' Conferences were biennial meetings of Prime Ministers of the United Kingdom and the Dominion members of the British Commonwealth of Nations. Seventeen Commonwealth Prime Ministers' Conferences were held between 1944 and 1969. As well, the prime ministers met for a Commonwealth Economic Conference in 1952. These series of conferences were a continuation and regularisation of the earlier Imperial Conferences which had been held periodically from 1887 to 1937. Since 1971, Commonwealth Heads of Government Meetings have been held. Of the seventeen meetings, sixteen were held in London, reflecting then-prevailing views of the Commonwealth