Peter Mandelson: from UK ambassador to Epstein-probe arrest
Peter Mandelson — sacked as Britain's ambassador to Washington in September 2025 over emails defending Epstein — is arrested in February 2026 on suspicion of misconduct in public office, accused of passing market-sensitive information to Epstein while a U.K. cabinet minister. The affair engulfs Keir Starmer's government.
Peter Mandelson, one of the architects of Britain’s New Labour project and a former European trade commissioner, had been a fixture of the U.K. establishment for decades. Prime Minister Keir Starmer appointed him His Majesty’s Ambassador to the United States in December 2024 to manage relations with the incoming Trump administration. The appointment unraveled spectacularly over his ties to Jeffrey Epstein.
The Sacking
On September 11, 2025, Starmer dismissed Mandelson as ambassador after the Sun published emails he had sent Epstein. In them, Mandelson called Epstein’s 2008 conviction wrongful and encouraged him to fight it — correspondence the Foreign Office said showed the relationship was “materially different” from what had been understood when he was appointed. He was withdrawn with immediate effect. Questions soon followed about how he had cleared security vetting at all, and whether officials had been pressed to wave the appointment through.
The Arrest
On February 23, 2026, the Metropolitan Police arrested Mandelson on suspicion of misconduct in public office. Investigators alleged that, while serving as U.K. business secretary, he had passed market-sensitive or confidential information to Epstein. He was questioned and released on bail. The arrest came days after the detention of Andrew Mountbatten-Windsor, making February 2026 the month British prosecutors moved against two of the most prominent members of Epstein’s U.K. network.
The Political Cost
The Mandelson affair became a lasting liability for Starmer. The vetting questions dominated exchanges in the Commons, with the prime minister forced to say he “deeply regrets” the appointment and to disclose that the Foreign Office had withheld vetting concerns. The scandal — bundled with broader voter anger — was widely blamed for Labour’s heavy losses in the May 2026 local elections, an illustration of how the Epstein files reshaped politics far beyond the United States.