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 past 70 years. Despite a relatively poor average poll rating as Prime Minister, Thatcher has since ranked highly in retrospective opinion polling and, according to YouGov, she is "see[n] in overall positive terms" by the British public. She was voted the fourth-greatest British prime minister of the 20th century in a poll of 139 academics organised by MORI. According to theatre critic Michael Billington, Thatcher left an "emphatic mark" on the arts while Prime Minister. One of the earliest satires of Thatcher as Prime Minister involved satirist John Wells (as writer and performer), actress Janet Brown (voicing Thatcher) and future