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UK PM's former chief of staff says he was wrong to encourage Mandelson appointment

Published by Global Banking & Finance Review

Posted on April 28, 2026

1 min read

· Last updated: April 28, 2026

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UK PM's former chief of staff says he was wrong to encourage Mandelson appointment
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UK PM's Former Chief Admits Mistake in Supporting Mandelson as US Ambassador

Parliamentary Testimony on Ambassador Appointment

Background of the Appointment

LONDON, April 28 (Reuters) - British Prime Minister Keir Starmer's former chief of staff, Morgan McSweeney, said on Tuesday he had been wrong to propose the appointment of Peter Mandelson as U.S. ambassador but he had not circumvented the hiring process.

Rationale Behind the Recommendation

McSweeney told parliament he had thought Mandelson, a Labour veteran, would help Britain to get a trade deal with the United States after Donald Trump was returned to the White House.

Admission of Error

"The appointment of Mandelson as ambassador was a serious error of judgment. I advised the prime minister in support of that appointment and I was wrong to do so," McSweeney told the committee.

Clarification on Hiring Process

"What I did not do was oversee national security vetting, ask officials to ignore procedures, request that steps should be skipped, or communicate explicitly or implicitly that checks should be cleared at all costs."

Reporting Credits

(Reporting by Sam Tabahriti; writing by Muvija M; Editing by Kate Holton)

Key Takeaways

  • McSweeney accepted that advising Mandelson’s ambassadorial appointment was a ‘serious error of judgment,’ yet denied any misconduct in the vetting process, stating he did not override security checks or urge shortcuts. (apnews.com)
  • The controversy centers on Mandelson’s known links to convicted sex offender Jeffrey Epstein and security concerns that were allegedly raised but overlooked in his appointment pathway. (apnews.com)
  • McSweeney resigned in February amid mounting pressure, saying the appointment had ‘damaged our party, our country and trust in politics itself’; his apology highlights the political fallout and questions over Prime Minister Starmer’s judgment. (scmp.com)

References

Frequently Asked Questions

Who admitted regret over the Mandelson ambassador appointment?
Morgan McSweeney, the former chief of staff to UK Prime Minister Keir Starmer, admitted regret for supporting Peter Mandelson's appointment.
Why was Peter Mandelson considered for the US ambassador role?
McSweeney believed Mandelson could help Britain secure a trade deal with the United States if Donald Trump returned to the White House.
Did McSweeney bypass the official vetting process for the appointment?
No, McSweeney stated he did not circumvent the national security vetting or any official hiring procedures.
What did McSweeney tell the parliamentary committee?
He admitted a serious error in judgment by supporting Mandelson's appointment but denied ignoring procedures or requesting vetting steps be skipped.

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