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
2016 Conservative Party (UK) leadership election 2016 Conservative Party (UK) leadership election The 2016 Conservative Party leadership election occurred as a result of David Cameron's resignation as leader following the European Union membership referendum, in which the United Kingdom voted to leave the EU. Cameron, who supported Britain's continued membership of the EU, made his announcement on 24 June, saying that he would step down by October. Theresa May won the contest on 11 July 2016, after the withdrawal of Andrea Leadsom left her as the sole candidate, succeeding Cameron as leader of the Conservative Party. Conservative MPs had voted initially in a series of ballots