British Prime Minister Keir Starmer leaves 10 Downing Street, on the day Chancellor of the Exchequer Rachel Reeves presents the Autumn Budget Statement to Parliament, in London, UK, 26 November 2025; Credit: Reuters/Hannah McKay/File Photo

LONDON (Reuters) - On Friday 17 April 2026, British Prime Minister Keir Starmer faced renewed calls from his political opponents to resign after it was revealed that his former ambassador to the United States failed security vetting and was still allowed to take up the job.

On Thursday 16 April 2026, the government confirmed Mandelson - who was subsequently fired after Starmer said he had lied about the strength of his relationship with sex offender Jeffrey Epstein - had failed his security vetting before taking up the role.

The government said Starmer was unaware officials in the foreign office had overruled the vetting recommendation and a source said the most senior official at the foreign ministry, Ollie Robbins, would leave his role after losing Starmer's confidence.

"I don't think the prime minister can get out of his responsibility by sacking Ollie Robbins. I think the buck has to stop with Mr Starmer," Liberal Democrat Leader Ed Davey told BBC Radio. "I think the evidence suggests that he misled the Commons [parliament] and misled the public. That's against all the rules, and that's why we've called for him to go."

Starmer has previously apologised for the appointment but defended his own actions, accusing Mandelson of creating a "litany of deceit" about his Epstein ties and promising to release documents on how he was appointed.

Senior minister Darren Jones told LBC Starmer was "furious" at not being told Mandelson had failed the security vetting and would update parliament on Monday. He said Starmer had not misled parliament and that the process around it was followed, but was flawed.

"I don't think it brings the Prime Minister's future into question," Jones said.

Mandelson is under police investigation for allegedly leaking government documents to the sex offender Jeffrey Epstein. He has not commented publicly on allegations he leaked documents, and a lawyer for Mandelson did not provide a comment on Thursday about the vetting process.