Keir Starmer announces resignation as UK prime minister

NPR reports via the Associated Press that British Prime Minister Keir Starmer announced Monday his resignation as Labour Party leader and will leave office within weeks, less than two years after winning a landslide election. The reporting is sourced from a major wire service (AP) published by an established national outlet (NPR), meeting high journalistic standards for political news of this magnitude. Multiple major outlets (NYT, BBC, CBS, NBC) corroborate the core facts: Starmer's resignation, the timeline for his departure, and context that his exit follows poor local election results and internal party pressure, with Andy Burnham positioned as a likely successor. Watch for the formal leadership election process within Labour, which will determine the next prime minister, and any interim governance questions during the transition period—the BBC notes Starmer will remain in office until a successor is chosen.