King Charles Had to Approve Peter Mandelson’s Appointment — Even After the Epstein Warnings

The British government has released internal documents that raise an uncomfortable question about one of the most controversial diplomatic appointments of recent years: why did the warning signs about Peter Mandelson not stop the process?

The papers show that before Mandelson was appointed ambassador to the United States in December 2024, officials flagged what they described as a “general reputational risk” connected to his relationship with Jeffrey Epstein.

The due-diligence briefing noted reports that Mandelson’s contact with Epstein continued between 2009 and 2011, after Epstein’s 2008 conviction for procuring an underage girl.

According to the document, Mandelson was also reported to have stayed at Epstein’s New York home in June 2009 while Epstein was serving his sentence.

Despite these warnings, the appointment moved forward. Mandelson formally took up the post in early 2025, replacing Dame Karen Pierce in Washington. Less than a year later, the role collapsed in scandal.

Starmer Now Says Mandelson Misled Downing Street

The controversy intensified when further details about Mandelson’s relationship with Epstein emerged in 2025 through the US Department of Justice’s Epstein document releases. Prime Minister Keir Starmer has since claimed Mandelson “lied repeatedly” about the extent of the relationship during the vetting process.

"There you have it, in black and white. The PM, Keir Starmer, warned in the clearest possible terms that Peter Mandelson maintained his relationship [with Epstein] after the conviction.. there is no escape from this" pic.twitter.com/O6UB2NHXnd

— Saul Staniforth (@SaulStaniforth) March 11, 2026

That explanation has not silenced criticism. Opposition MPs forced the release of thousands of pages of documents through a rarely used parliamentary procedure known as a humble address, compelling the government to publish the files.

The documents show officials raised concerns before the appointment, but did not block it. Government minister Darren Jones later admitted the due-diligence process “fell short of what was required.”

Mandelson resigned as ambassador in September 2025. Freedom of Information documents later revealed he received a £75,000 taxpayer-funded severance payment after leaving the role.

The Role of the Monarch in Diplomatic Appointments

One detail in the released correspondence has drawn particular attention. Formal diplomatic appointments, such as the UK ambassador to Washington, require the approval of the monarch. That means King Charles had to sign off on the appointment once it reached the final stage.

In practice, this approval is part of Britain’s constitutional system, where the monarch acts on the advice of the government. Still, the paperwork highlights the awkward overlap between politics and the Crown. The same appointment process that produced warnings about reputational risk ultimately moved forward through the highest levels of the British state. Government ministers approved it. The diplomatic system processed it. And the monarch formally authorised it.

A Diplomatic Scandal That Raises Bigger Questions

The Mandelson files reveal a familiar pattern in British politics: warnings raised, risks acknowledged and then quietly ignored. Starmer has apologised for the appointment, saying he now regrets believing Mandelson’s assurances about his Epstein connections. Yet the documents suggest the issue was not hidden from officials at the time. It was already on the table.

The scandal now leaves both government and establishment institutions facing uncomfortable scrutiny. Because the appointment of an ambassador to the United States is not a minor administrative decision. It is one of the most visible diplomatic roles in Britain’s foreign policy. And the newly released documents show the warning signs were there long before the scandal exploded.