UK Prime Minister Keir Starmer announced his resignation on Monday in a televised address from 10 Downing Street in London, citing months of internal conflict within the Labour Party. Starmer, who took office in July 2024, becomes the sixth prime minister to leave before completing a full term since Brexit — the UK's 2016 departure from the European Union — joining a list that includes Boris Johnson, Liz Truss, and Rishi Sunak. He will serve as caretaker prime minister until a successor is chosen, with Andy Burnham emerging as a potential contender after winning a parliamentary seat in North West England just days before the announcement.