Third Thatcher ministry to make way for a leader more likely to win the next general election. Her successor was the Chancellor of the Exchequer John Major, who was elected on 27 November 1990, and who at 47 became the youngest Conservative Prime Minister of the 20th century. <section begin="June 1987 to July 1989" /> <section begin="July 1989 to November 1990" /> Members of the Cabinet are in bold face. Third 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
Margaret Thatcher of the Conservative Party in 1975. As Prime Minister, Thatcher received two honorary distinctions: Two weeks after her resignation, Thatcher was appointed Member of the Order of Merit (OM) by the Queen. Her husband Denis was made a hereditary baronet at the same time. As his wife, Thatcher was entitled to use the honorific style "Lady", an automatically conferred title that she declined to use. She became Lady Thatcher in her own right upon her ennoblement in the House of Lords. In the Falklands, Margaret Thatcher Day has been marked each 10 January since 1992, commemorating her first visit to