Starmer’s Chief of Staff Resigns Over Mandelson Ambassador Appointment Amid Epstein Controversy

The UK government has been thrown into fresh turmoil after Prime Minister Keir Starmer’s chief of staff, Morgan McSweeney, resigned following mounting controversy over the appointment of Peter Mandelson as Britain’s ambassador to the United States.

The fallout centers on Mandelson’s past links to disgraced financier and convicted sex offender Jeffrey Epstein, which have reignited public outrage and raised serious questions about political judgment at the highest level.

McSweeney, the most senior political adviser to the prime minister, announced his resignation on Sunday, taking responsibility for advising Starmer to make the appointment last year. In a statement to reporters, he said the decision had proven damaging not only to the Labour Party but also to public trust in politics. “The decision to appoint Peter Mandelson was wrong,” McSweeney said, adding that under the circumstances, stepping aside was “the only honourable course.”

Although McSweeney said he was not directly responsible for overseeing the due diligence and vetting process, he stressed that the system must now be fundamentally reformed. According to him, any review of the process must go beyond symbolism and become a meaningful safeguard to prevent similar controversies in the future.

Prime Minister Starmer accepted the resignation and paid tribute to McSweeney’s role in Labour’s recent electoral success. In a statement, Starmer said the party’s landslide victory owed much to McSweeney’s dedication, loyalty, and leadership, praising his contribution at a critical moment for the country.

The resignation comes amid escalating scrutiny of Peter Mandelson following the release of a new batch of Epstein-related files by the US Justice Department. The disclosures prompted a police investigation in the UK into allegations that Mandelson may have passed on market-sensitive government information of clear financial interest to Epstein in the aftermath of the 2008 financial crisis. As part of the investigation into suspected misconduct in public office, police raided two of Mandelson’s properties on Friday.

The pressure quickly mounted. Mandelson resigned from the Labour Party last Sunday and stepped down from the House of Lords on Wednesday, effectively ending his formal role in British politics. His appointment as ambassador had been controversial from the outset, given his long-standing and well-documented friendship with Epstein, which continued even after Epstein’s 2008 conviction for soliciting prostitution from an underage girl.

The unfolding scandal has plunged Starmer’s government into crisis, with critics questioning how such an appointment was approved despite the reputational risks. For a government that campaigned heavily on restoring integrity and trust in public life, the episode has become a major political test.

As investigations continue and political fallout deepens, the Mandelson affair is shaping up to be one of the most serious challenges of Starmer’s leadership so far, forcing his government to confront difficult questions about accountability, vetting, and judgment at the very top.