Who became Prime Minister after Churchill?

The Right Honourable Sir Robert Anthony Eden, The 1st Earl of Avon.

Prime Minister - 7 April 1955 to 10 January 1957

Errr... no the above answer is wrong. Churchill was succeeded by Clement Attlee, a labour prime minister. On the 25th July 1945 labour won by a landslide and Clement Attlee was in office by the 26th July until the 26th October 1951.

Both answers are right. Churchill held the office twice. After his first term ()1940-1945), Attlee took over. After his 2nd term (1951-1955), Eden took over.