<P> The result was an unexpected landslide victory for Clement Attlee 's Labour Party , over Winston Churchill 's Conservatives . It was the first time the Conservatives had lost the popular vote since the 1906 election ; they would not win it again until 1955 . Labour won its first majority government , and a mandate to implement its postwar reforms . The 12.0 % national swing from the Conservative Party to the Labour Party remains the largest ever achieved in a British general election . </P>
in 1945 which party came into power in england
Labour Party