'With hereditary peerages again being created under Thatcher, Macmillan requested the earldom that had been customarily bestowed to departing prime ministers, and on 24 February 1984 he was created Earl of Stockton and Viscount Macmillan of Ovenden.He is the last Prime Minister to have been given an hereditary peerage, although Margaret Thatcher's husband was later given a baronetage, which passed on to her own son.