Keir Starmer officially became British Prime Minister following a landslide victory for the Labour Party after over a decade in opposition. He took office after a private ceremony with King Charles III at Buckingham Palace, succeeding Conservative leader Rishi Sunak, who resigned after conceding defeat. Labour secured 410 seats in the 650-seat House of Commons, with Starmer acknowledging the mandate as a responsibility to rebuild trust amid economic challenges and societal fractures.
