Harold Macmillan, 1st Earl of Stockton

Maurice Harold Macmillan, 1st Earl of Stockton, OM, PC (1894–1986) was a British Conservative politician and Prime Minister of the United Kingdom from 10 January 1957 to 18 October 1963.

Harold Macmillan in "A Massachusetts Yankee in King Arthur's Court"
Harold Macmillan met with United States President John F. Kennedy in 1963 for a summit at 10 Downing Street. Macmillan's government was embroiled in the Profumo Scandal; people on the street called out insults at Macmillan. Kennedy, however, was met with adulation.

Unknown to Macmillan, Kennedy was magically transported to the historical Cam'lod'n over night. While Kennedy had initially believed his trip to be a dream, Macmillan began their meeting by noting an American dime had been found with otherwise undisturbed post-Roman artifacts in Colchester, confirming for Kennedy that he had not been dreaming.