The iconic British Prime Minister known as the “Iron Lady” was Margaret Thatcher. Serving from 1979 to 1990, she was the first woman to hold the office. Her leadership style was characterized by strong convictions, economic liberalization, and a tough stance against the Soviet Union. Thatcher implemented policies known as Thatcherism, focusing on free markets, privatization, and reducing the power of trade unions. Her tenure significantly transformed British politics and the economy, earning her both staunch supporters and critics.