Premiership of Margaret Thatcher Premiership of Margaret Thatcher Margaret Thatcher served as Prime Minister of the United Kingdom from May 1979 to November 1990. She became Prime Minister after serving as Leader of the Conservative Party since 1975. In domestic affairs, Thatcher is best known for her sweeping policies concerning the affairs of the economy, including the privatisation of most nationalised industries. In foreign policy, she fought a war against Argentina and played a key role with President Ronald Reagan and Soviet leader Mikhail Gorbachev in ending the Cold War. By the late 1980s, she was alienating many senior members of her Cabinet by
Mark Thatcher the elevation of his mother to the peerage as a baroness in 1992; he shares this courtesy with his twin sister, Carol. After the death of his father in 2003, he inherited the Thatcher baronetcy which had been awarded in 1990, the first baronetcy created since 1964. Following his conviction in relation to the Equatorial Guinea coup d'état in 2004, it was suggested that he should be stripped of the title. Mark Thatcher Sir Mark Thatcher, 2nd Baronet (born 15 August 1953) is a British businessman. He is the son of Margaret Thatcher, former Prime Minister of the United Kingdom,