UK Prime Minister Keir Starmer is under mounting pressure after ministers revealed he would have blocked the appointment of Peter Mandelson as US ambassador had he known the former cabinet minister failed security vetting. The controversy has exposed serious breakdowns within the Foreign Office, with Downing Street claiming that critical red flags were never communicated to the prime minister. As a result, Starmer now faces calls from opposition parties to resign, with critics accusing him of misleading Parliament about the integrity of the appointment process.
Senior ministers have moved quickly to defend Starmer, insisting he was informed that Mandelson had received the highest level of security clearance. Technology Secretary Liz Kendall emphasized that the prime minister relied on official assurances, while Deputy Prime Minister David Lammy said he was equally unaware of the failed vetting. The episode has intensified scrutiny of internal government procedures, particularly how sensitive security assessments are handled and communicated during high-profile diplomatic appointments.