Margaret Hilda Thatcher (b 1925) secured her third term of office on 12 June 1987. She studied chemistry at Oxford University, and worked as a research chemist before becoming a barrister in 1954. She began her parliamentary career in 1961. In 1970 she was made Secretary of State for Education and Science, and in 1974, Opposition Front-bench Spokesman. She was elected leader of the Conservative Party in 1975, and in 1979 became Britain's first female prime minister (1979-1990). In 1992 she was elevated to the House of Lords to become Barones Thatcher of Kesteven.
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