Sir Winston Leonard Spencer Churchill (30 November 1874 – 24 January 1965) was a British statesman, soldier, and writer who served as Prime Minister of the United Kingdom twice, from 1940 to 1945 during the Second World War, and again from 1951 to 1955. Apart from two years between 1922 and 1924, he was a Member of Parliament (MP) from 1900 to 1964 and represented a total of five constituencies. Ideologically an economic liberal and imperialist, he was for most of his career a member of the Conservative Party, which he led from 1940 to 1955. He was a member of the Liberal Party from 1904 to 1924.
Winston Churchill's Conservative Party lost the July 1945 general election, forcing him to step down as Prime Minister of the United Kingdom. For six years he served as the Leader of the Opposition. During these years he continued to influence world affairs. In 1946 he gave his "Iron Curtain" speech which spoke of the expansionist policies of the Soviet Union and the creation of the Eastern Bloc; Churchill also argued strongly for British independence from the European Coal and Steel Community; he saw this as a Franco-German project and Britain still had an empire. In the General Election of 1951, Labour was defeated.
Churchill became Prime Minister for a second time. He continued to lead Britain but was to suffer increasingly from health problems. Aware that he was slowing down both physically and mentally, he resigned in 5th April 1955. He continued to sit as MP for Woodford until he retired from politics in 1964.