Prime Minister of the United Kingdom century as a convention of the constitution, the position of Leader of the Opposition was given statutory recognition in 1937 by the Ministers of the Crown Act. British Prime Ministers have never been elected directly by the public. A Prime Minister need not be a party leader; David Lloyd George was not a party leader during his service as prime Minister during World War I, and neither was Ramsay MacDonald from 1931 to 1935. Prime Ministers have taken office because they were members of either the Commons or Lords, and either inherited a majority in the Commons or won more
House of Commons of the United Kingdom Accordingly, the House of Commons assumed its current title. Under the Parliament Act 1911, the Lords' power to reject legislation was reduced to a delaying power. The Government is solely responsible to the House of Commons and the Prime Minister stays in office only as long as he or she retains the support of a majority of the Commons. Although it does not formally elect the prime minister, the position of the parties in the House of Commons is of overriding importance. By convention, the prime minister is answerable to, and must maintain the support of, the House of Commons.