Sir Winston Leonard Spencer-Churchill (30 November 1874 – 24 January 1965) was a British politician, army officer, and writer, who was Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955. As Prime Minister, Churchill led Britain to victory in the Second World War. Ideologically an economic liberal and British imperialist, he was a Conservative until 31 May 1904 when he crossed the floor, defecting from the Conservatives to sit as a member of the Liberal Party in the House of Commons where he was a member of the Liberal Party from 1904 to 1924 before defecting to the Conservative Party, which he led from 1940 to 1955. Churchill represented five constituencies during his career as Member of Parliament (MP).
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