 Eden resigned in January 1957. In 1955 he had been the obvious successor to Churchill, but this time there was no clear heir apparent. Leaders of the Conservative party were not elected by ballot of MPs or party members, but emerged after informal soundings within the party, known as "the customary processes of consultation". The chief whip, Edward Heath, canvassed the views of backbench Conservative MPs, and two senior Conservative peers, the Lord President of the Council, Lord Salisbury, and the Lord Chancellor, Lord Kilmuir, saw members of the cabinet individually to ascertain their preferences. Only one cabinet colleague supported Butler; the rest, including Home, opted for Macmillan. Churchill, whom the Queen consulted, did the same. Macmillan was appointed Prime Minister on 10 January 1957.
