The name of the first female Prime Minister of the UK is Margaret Thatcher. Serving from 1979 to 1990, she was the leader of the Conservative Party and became known for her strong conservative policies, including economic liberalization and reducing the power of trade unions. Thatcher's leadership style earned her the nickname "The Iron Lady" for her unwavering stance on various issues, both domestically and internationally. Her tenure significantly transformed British politics and had a lasting impact on the nation's economic landscape.