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.
Premiership of Margaret Thatcher by Third World leaders, including Indian Prime Minister Rajiv Gandhi and Malaysian Prime Minister Mahathir Mohamad, that her opposition threatened to break up the 49-nation Commonwealth. In return, calls for a total embargo were abandoned, and the existing restrictions adopted by member states against South Africa were lifted. ANC president Tambo expressed disappointment at this major compromise. Hong Kong was ceded to the British Empire following the First Opium War and in 1898 Britain obtained a 99-year lease on the territory. In 1984 Thatcher visited China with a view to resolve the difficulties that would inevitably be encountered as Hong