Margaret Thatcher has resigned as Prime Minister of the United Kingdom after serving for 11 years, making her the longest-serving British prime minister of the 20th century. Her departure follows a leadership challenge within her Conservative Party, which ultimately compelled her to step down.

Thatcher’s time in office, beginning in 1979, was marked by significant economic and social reforms as well as a strong stance on foreign policy issues. However, her tenure also faced growing dissent within her party and among the public, particularly over policies such as the poll tax and public sector cuts.

The internal challenge to her leadership reflected a shift in sentiment among Conservative lawmakers who questioned her ability to lead the party forward. While Thatcher initially sought to win another leadership contest, she announced her resignation after it became clear she lacked sufficient support.

Her resignation paves the way for a new leader to take control of the Conservative Party and the government. Discussions have focused on who might succeed her, with several prominent figures considered potential candidates.

Thatcher’s legacy remains a subject of debate, with supporters praising her determination and transformative impact on the British economy and international standing, while critics highlight the social divisions and unrest that followed some of her policies.

Her departure marks the end of an era in British politics, ending more than a decade of Conservative dominance under her leadership.