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
Mark Thatcher the elevation of his mother to the peerage as a baroness in 1992; he shares this courtesy with his twin sister, Carol. After the death of his father in 2003, he inherited the Thatcher baronetcy which had been awarded in 1990, the first baronetcy created since 1964. Following his conviction in relation to the Equatorial Guinea coup d'état in 2004, it was suggested that he should be stripped of the title. Mark Thatcher Sir Mark Thatcher, 2nd Baronet (born 15 August 1953) is a British businessman. He is the son of Margaret Thatcher, former Prime Minister of the United Kingdom,