Margaret Thatcher Foundation in 2006, where she established the Margaret Thatcher Center for Freedom. Margaret Thatcher Margaret Hilda Thatcher, Baroness Thatcher, (; 13 October 19258 April 2013) was a British stateswoman who served as Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990. She was the longest-serving British prime minister of the 20th century and the first woman to hold that office. A Soviet journalist dubbed her "The 'Iron Lady, a nickname that became associated with her uncompromising politics and leadership style. As Prime Minister, she implemented policies known as Thatcherism.
Prime Minister of the United Kingdom PM may resign, either purely personally or with the whole government. The Prime Minister generally co-ordinates the policies and activities of the Cabinet and Government departments, acting as the main public "face" of Her Majesty's Government. Although the Commander-in-Chief of the British Armed Forces is legally the Sovereign, under constitutional practice the Prime Minister can declare war, and through the Secretary of State for Defence (whom the PM may appoint and dismiss, or even appoint himself or herself to the position) as chair of the Defence Council the power over the deployment and disposition of British forces. The Prime Minister