He had operation to remove gallstones in 1953. The operation went wrong, and his health was ruined. ... This and his health led up to his resignation as Prime Minister. Eden died of liver cancer, aged 79.

How did Churchill die?

Churchill suffered a major heart attack, while still in office in 1953, so the BBC and all other national newspapers, would have prepared obituaries in advance, to be used when he died. Churchill died on 24 January 1965.

What happened to Anthony Eden at the end of Season 1?

Near the end of Season 1, Anthony Eden (Jeremy Northam) replaces Churchill as prime minister and inherits a diplomatic nightmare. ... Nasser became Egypt's president and nationalized the canal in 1956, and Eden retaliated with an ill-conceived invasion that went down in history as the Suez Crisis.