Premiership of Margaret Thatcher that Thatcher proceed cautiously in working with black communities because she believed they gave cannabis to babies. 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
Margaret Thatcher the party. During her premiership Thatcher had the second-lowest average approval rating (40%) of any post-war Prime Minister. Since the resignation of Nigel Lawson as Chancellor in October 1989, polls consistently showed that she was less popular than her party. A self-described conviction politician, Thatcher always insisted that she did not care about her poll ratings and pointed instead to her unbeaten election record. Opinion polls in September 1990 reported that Labour had established a 14% lead over the Conservatives, and by November the Conservatives had been trailing Labour for 18 months. These ratings, together with Thatcher's combative personality and