1990 Conservative Party (UK) leadership election 1990 Conservative Party (UK) leadership election The 1990 Conservative Party leadership election in the United Kingdom took place on 20 November 1990 following the decision of Michael Heseltine, former Defence and Environment Secretary, to challenge Margaret Thatcher, the incumbent Prime Minister, for leadership of the Conservative Party. Thatcher failed to win outright under the terms of the election in the first ballot, and was persuaded to withdraw from the second round of voting. She announced her resignation on the morning of 22 November 1990, ending more than 15 years as Conservative leader and 11 years as Prime Minister. Discontent with
Edward Heath so the waiting press would not realise how brief the visit had been. Heath claimed that he had simply declined her request for advice about how to handle the press, whilst Thatcher claimed that she offered him any Shadow Cabinet position he wanted and asked him to lead the Conservative campaign in the imminent EEC referendum, only to be rudely rebuffed. Heath, for many years, persisted in criticism of the party's new ideological direction. At the time of his defeat, he was still popular with rank and file Conservative members and was warmly applauded at the 1975 Conservative Party Conference.