Clement Attlee was invited by King George VI to form the Attlee ministry in the United Kingdom in July 1945, succeeding Winston Churchill as Prime Minister of the United Kingdom. The Labour Party had won a landslide victory at the 1945 general election, and went on to enact policies of what became known as the post-war consensus, including the establishment of the welfare state and the nationalisation of some industries. The government's spell in office was marked by post-war austerity measures, the violent crushing of pro-independence and communist movements in Malaya, the grant of independence to India, the engagement in the Cold War against Soviet Communism as well as the creation of the country's National Health Service (NHS).

Clement Richard Attlee, 1st Earl Attlee, was a British statesman and Labour Party politician who served as Prime Minister of the United Kingdom from 1945 to 1951 and Leader of the Labour Party from 1935 to 1955. Attlee served as Deputy Prime Minister during the wartime coalition government under Winston Churchill, and Leader of the Opposition twice from 1935 to 1940 and from 1951 to 1955. He remains the longest serving Labour leader.