Alec Douglas-Home

Sir Alec Douglas-Home, previously Earl Home, was a Conservative politician who served as the Prime Minister of the United Kingdom from 1963 to 1964, succeeding Harold Macmillan. In 1964, there was a failed attempt to kidnap him, which was subsequently covered up by the British government. Sir Toby Kinsella once remarked that the civil service's job was “trying to work out what Earl Home [accidentally calling him that] thinks so we can agree with him before he’s said it”. (AUDIO: The Pelage Project)

Later that year, he was succeeded by Harold Wilson as the Labour Party won the general election. General Peters regarded Douglas-Home as ineffectual but believed that he had the right idea about the United Kingdom's place in the world. (AUDIO: State of Emergency)

Behind the scenes
Douglas-Home gave up his earldom in order to become Prime Minister, as a PM from the House of Lords wouldn't have been accepted. Sir Toby calls him "Earl Home" and then corrects himself, saying it's a "hard habit to break", as a nod to this.