Margaret Thatcher was Britain’s longest-serving prime minister, from 1979 to 1990. She was often dubbed as the Iron Lady. Her tenure as the prime minister has had a lasting impact on post-war British politics. Margaret Thatcher was considered as the divisive prime minister and earned both respect and hatred from the general public for her treatment of trade unions. She transformed the country when she smashed political consensus. Throughout the 1980s, Margaret Thatcher dominated political life in the United Kingdom.