Records of Prime Ministers of the United Kingdom combined with his first term (13 July 176530 July 1766) his total time in office was 1 year and 113 days, which exceeds the total periods of several other Prime Ministers. (The Duke of Wellington had also served as Prime Minister between 1828 and 1830.) Consequently, the Prime Minister with the total shortest period in office was George Canning, whose sole term lasted 119 days from 12 April 1827 until his death on 8 August 1827. The Prime Minister with the longest period between the start of their first appointment and the end of their final term was the Duke
1957 Commonwealth Prime Ministers' Conference Multilateral nuclear disarmament negotiations were also discussed. This was the first Commonwealth Prime Ministers' Conference attended by Ghana, which had attained independence in March 1957. 1957 Commonwealth Prime Ministers' Conference The 1957 Commonwealth Prime Ministers' Conference was the ninth Meeting of the Heads of Government of the Commonwealth of Nations. It was held in the United Kingdom in June 1957, and was hosted by that country's Prime Minister, Harold Macmillan. The new Canadian prime minister, John Diefenbaker, proposes the intensification of trade relations within the Commonwealth. His call for an Empire Trade Conference were resisted by the British government which