when did thatcher rule
Margaret Hilda Thatcher, Baroness Thatcher, LG, OM, PC, FRS, FRIC (nÃ©e Roberts; 13 October 1925 â 8 April 2013) was a British stateswoman who was the Prime Minister of the United Kingdom from 1979 to 1990 and the Leader of the Conservative Party from 1975 to 1990.