Committee publication · Report · 9 July 2026 · HC 504

1st Report - The appointment of Peter Mandelson as British Ambassador to the United States

From: Foreign Affairs Committee

Inquiry: Work of the Foreign, Commonwealth and Development Office

Government response deadline: 9 September 2026

Summary

The Foreign Affairs Committee's report on Peter Mandelson's appointment as British Ambassador to the United States concludes it was a failure that lacked proper process and political safeguards. Despite being one of the UK's most important diplomatic posts, the appointment was rushed, bypassed departmental consultation, had its security vetting deprioritised, and only ended when credible Jeffrey Epstein allegations surfaced in September 2025, nine months after he took office.

Key findings

  • The appointment was imposed by Number 10 on the FCDO without consultation with the Foreign Secretary or Permanent Under-Secretary, driven by speed and presidential inauguration timescales rather than merit.
  • Security vetting was treated as an afterthought; officials debated whether Mandelson needed clearance at all, and he received classified briefings and building access before vetting was completed.
  • Due diligence was conducted on only two candidates (Mandelson and George Osborne) with no record of how the final choice was made or evidence of consultation with either the head of the Diplomatic Service or then-Foreign Secretary David Lammy.
  • Critical governance documents are missing: no record of the Prime Minister's decision, response to box notes, or final approval; FCDO and Cabinet Office record-keeping was 'appalling', with some documents potentially held by Metropolitan Police.
  • Mitigations for Mandelson's Epstein relationship and Global Counsel shareholding conflicts were said to exist but never published; the Committee saw no written evidence of how national security risks would be managed.

Recommendations

  • No public appointments should be announced without appropriate security clearance first being granted; if urgent, request papers be prioritised but the process must be completed thoroughly without pressure to deliver a predetermined outcome.
  • A formal process for political ambassadorial appointments must be set out by the Cabinet Office in consultation with the FCDO, addressing concerns raised in this report, and the draft must be shared with the Foreign Affairs Committee.
  • The due diligence report must be shared with the hiring department, which must have the opportunity to contribute fully to the due diligence process.
  • The Foreign Secretary and Head of the Diplomatic Service must always be consulted on ambassador appointments, even when a Prime Minister wishes to make a specific political appointment.
  • Staff at Number 10 (political and civil service) must be regularly reminded of the power their office carries and its impact on recipients who may feel pressure to comply with perceived requests from the Prime Minister.
  • The Government should not make another political appointment to a Head of Mission post without candidates first appearing before the Foreign Affairs Committee in a pre-appointment evidence session, and the Committee should have the ability to formally veto an appointment.

Tone

Critical

Topics

diplomatic-appointmentsnational-security-vettinggovernment-processrecord-keepingpolitical-appointments

Key actors

Peter Mandelson, Emily Thornberry, Sir Olly Robbins, Sir Philip Barton, Prime Minister (Keir Starmer), David Lammy, Cat Little, Jeffrey Epstein

Notable line

The decision to appoint Peter Mandelson as His Majesty's Ambassador to the United States has been nothing short of disastrous.

Key Quotes

The decision to appoint Peter Mandelson as His Majesty's Ambassador to the United States has been nothing short of disastrous.
Foreign Affairs Committee · opening summary judgment on the appointment
I knew that there had been an appointment process of sorts, and that No. 10 had operated that with the Cabinet Office. But to be honest, I think I first heard the words "due diligence report" after he was withdrawn as ambassador.
Sir Olly Robbins · describing lack of awareness of key decision-making documentation
… there was a "generally dismissive attitude" by Number 10 towards Peter Mandelson's vetting.
Sir Olly Robbins · characterising pressure to deprioritise security clearance process
… you have a publicly announced ambassador-designate to do the single most important ambassador job for the UK. You have a very, very compressed timescale that you are being asked to meet for them to start their role in Washington.
Sir Philip Barton · explaining why Mandelson received classified briefings before vetting was complete
This was honestly the hardest bit of this bit of the process for both of us. Lord Mandelson was a founder of the company. It is a private company, without traded stock.
Sir Olly Robbins · discussing conflicts of interest regarding Global Counsel shareholding
There is a real difference between asking people to act at pace and asking people to lower standards, and we never did that; we never asked people to skip steps at any part of the process.
Morgan McSweeyer · defending Number 10's approach to the appointment process
I regret appointing him. If I knew then what I know now, he would never have been anywhere near Government.
Prime Minister (Keir Starmer) · statement after Mandelson's dismissal in September 2025
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Source · parliament.uk record ↗

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