British Prime Minister Sir Keir Starmer says he will fight to maintain his leadership following a by-election win by the mayor of Manchester, according to multiple reports. The news comes after the mayor secured victory in what outlets describe as a key by-election, which has fueled discussion about Starmer’s standing within his party and broader political leadership. In response to the result, Starmer publicly vowed to contest and retain his role as prime minister, framing the challenge as something he intends to address directly. The coverage across outlets aligns on the central points: Starmer’s leadership pledge, the Manchester mayor’s by-election win, and the implication that party dynamics are being tested. While the articles differ in how they may characterize the political context, they agree on the sequence of events and the statement from Starmer that he intends to remain in charge. No additional policy changes or specific details of any internal party process are included in the provided summaries.