Who was the first woman prime minister of Britain?
Mrs. Thatcher Margaret was the first woman prime minister of Britain. Margaret Hilda Thatcher, Baroness Thatcher, LG, OM, PC, FRS (born 13 October 1925) is a former Prime Minister of the United Kingdom who served from 1979 to 1990. Born in Grantham, Lincoln shire, she studied chemistry at Somerville College, Oxford before qualifying as a barrister.