British Prime Minister Sir Keir Starmer has announced his resignation as leader of the Labour Party, following months of growing pressure from within his party and a decline in public support. Speaking outside 10 Downing Street, Starmer said he had informed King Charles III of his intention to step down and pledged to oversee an orderly transition of power. His departure will make him the sixth UK prime minister to leave office in the past decade, with Britain now preparing to welcome its seventh prime minister in just 10 years.