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
Margaret Thatcher had been badly misinterpreted, arguing that race was never an important focus of Thatcherism. Throughout her premiership, both major parties took similar positions on immigration policy, having in 1981 passed the British Nationality Act with bipartisan support. There were no policies passed or proposed by her government aimed at restricting immigration, and the subject of race was never highlighted by Thatcher in any of her major speeches as Prime Minister. Many of Thatcher's policies had an influence on the Labour Party, which had returned to power in 1997 under Tony Blair. Blair rebranded the party "New Labour" in 1994 with