Clement Richard Attlee , 1st Earl Attlee , KG , OM , CH , PC was born on 3 January 1883 and died on 8 October 1967 was a British prime minister . Clement Richard Attlee , 1st Earl Attlee , KG , OM , CH , PC , FRS ( 3 January 1883 â `` 8 October 1967 ) was a British Labor politician who served as the Prime Minister of the United Kingdom from 1945 to 1951 , and as the Leader of the Labor Party from 1935 to 1955 .