1989 Conservative Party (UK) leadership election and the Labour lead in the opinion polls mounted into double digits, Thatcher resigned as party leader and Prime Minister after a further contest in November 1990. 1989 Conservative Party (UK) leadership election The 1989 Conservative Party leadership election took place on 5 December 1989. The incumbent Margaret Thatcher was opposed by the little-known 69-year-old backbencher MP Sir Anthony Meyer. It was the Conservative Party's first leadership election for nearly 15 years, when Thatcher had taken the party leadership. During 1989 the Conservative government led by Thatcher had run into difficulties. The Chancellor of the Exchequer, Nigel Lawson, had resigned
1990 Conservative Party (UK) leadership election opposition benches and reinforced the change in general perception of Thatcher from the "Iron Lady" to a divisive and confrontational figure. The next morning, 14 November, Heseltine announced that he would challenge her for the leadership of the party. The rules for Conservative leadership contests had been introduced for the first such election, in 1965, and modified in 1975, the occasion of Thatcher's own victory over the incumbent leader Edward Heath. There would be a series of ballots of Conservative MPs, conducted by the 1922 Committee, with that committee's chairman, Cranley Onslow, as Returning Officer. To win in the first