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 Australia Ben Chifley lived the least of all former prime ministers, as he died one year and six months after his term as prime minister. All other deceased former prime ministers have lived at least another 10 years, with the longest surviving former prime minister being Gough Whitlam, who lived 38 years and 11 months after office, surpassing Stanley Bruce's previous record of 37 years and 10 months. The youngest person to become prime minister was Chris Watson37, who was also 37 when he ceased being prime minister. The oldest person to become prime minister was John McEwen67 as an interim