As the UK’s first female Prime Minister, serving from 1979 to 1990, she was the longest-serving premier of the 20th century. Known as the ’Iron Lady’, her tenure was defined by ’Thatcherism’, a radical programme of privatisation, deregulation, and curbing trade union power. She led Britain to victory in the Falklands War and significantly reshaped the nation’s economy and society. Her political philosophy championed individual liberty and reduced state intervention. Her impactful, yet often divisive, legacy continues to be widely debated.