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
Premiership of Margaret Thatcher Meyer. As Meyer was a virtually unknown backbench MP, he was viewed as a "stalking horse" candidate for more prominent members of the party. Thatcher easily defeated Meyer's challenge, but there were sixty ballot papers either cast for Meyer or abstaining, a surprisingly large number for a sitting Prime Minister. Her supporters in the Party, however, viewed the results as a success, claiming that after ten years as Prime Minister and with approximately 370 Conservative MPs voting, the opposition was surprisingly small. Thatcher was fiercely committed to a new tax—commonly called the "poll tax"—that would apply in equal amounts to