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.
Conservative Party (UK) leadership election, 2003 The 2003 Conservative Party leadership election was caused by the enforced resignation of incumbent leader Iain Duncan Smith after the loss of a confidence vote among his parliamentary party. The causes of Duncan Smith's fall are often cited as his lack of charisma and impact with the public, the uninspired direction of the party under his leadership, and his previous failure to achieve more than a third of support among Members of Parliament in the 2001 leadership contest. In the event, the Conservative Party coalesced around Michael Howard as replacement leader and there was not a contest to replace Duncan Smith.