Prime Minister of the United Kingdom retirement from the Commons, which elevates the individual to the House of Lords. Formerly, the peerage bestowed was usually an earldom, with Churchill offered a dukedom. From the 1960s onward, life peerages were preferred, although in 1984 Harold Macmillan was created Earl of Stockton. Sir Alec Douglas-Home, Harold Wilson, James Callaghan and Margaret Thatcher accepted life peerages, although Douglas-Home had previously disclaimed his hereditary title as Earl of Home. Edward Heath did not accept a peerage of any kind and nor have any of the Prime Ministers to retire since 1990; although Heath and Major were later appointed as Knights
Life peer in 1913, to seven in 1919, to nine in 1947, to 11 in 1968 and to 12 in 1994. These provisions were repealed by the Constitutional Reform Act 2005 which created the Supreme Court of the United Kingdom. The rate of creation of life peerages under the Life Peerages Act has not shown a consistent pattern. David Cameron and Tony Blair have created life peerages at the highest rate, at 41 and 36 peerages per year respectively. Conservative Prime Ministers have created on average 20 life peers per year in office, Labour Prime Ministers an average of 27.2 per year.