A British Conservative politician who served three periods as what, that had  a substantially increased majority of 60 for the Conservative government against the Labour Party?
United Kingdom general election, 1955 The 1955 United Kingdom general election was held on 26 May 1955, four years after the previous general election. It resulted in a substantially increased majority of 60 for the Conservative government under new leader and prime minister Sir Anthony Eden against the Labour Party, then in their twentieth year of leadership by Clement Attlee.
First Thatcher ministry Margaret Thatcher was Prime Minister of the United Kingdom from 4 May 1979 to 28 November 1990, during which time she led a Conservative government. She was the first woman to hold that office. During her premiership, Thatcher moved to liberalise the British economy through deregulation, privatisation, and the promotion of entrepreneurialism.