Keir Starmer has resigned as UK prime minister after serving just over two years, departing with a reputation for restoring economic stability and governmental competence following years of Conservative upheaval. His most notable foreign policy achievement was building the Coalition of the Willing, which rallied European allies to support Ukraine's security. This effort strengthened the UK's relationship with Europe, contributing to a 40% reduction in illegal Channel crossings—a key inheritance for his successor, Andy Burnham.