Former British cabinet minister and diplomat Peter Mandelson was arrested on suspicion of misconduct in public office, the Metropolitan Police confirmed Monday, as part of an ongoing investigation into his conduct during his time in government.
Officers were seen entering Mandelson’s home in London on Monday evening before he was taken into custody. The Metropolitan Police said the arrest relates to alleged “misconduct in public office,” a common-law offence that can apply when a public figure is accused of abusing their official position.
The investigation stems from a broader criminal probe launched by police in early February, following the release of documents from the Jeffrey Epstein files that appeared to show communications between Mandelson and the late, convicted sex offender, including discussions of government matters. Senior officers previously executed search warrants at Mandelson’s properties in Camden and Wiltshire as part of the misconduct inquiry.
Mandelson, 72, is a longtime Labour Party politician who served in senior roles, including European Trade Commissioner, U.K. business secretary, and, under Prime Minister Gordon Brown, one of the government’s most influential ministers. More recently, he served as the United Kingdom’s ambassador to the United States before being removed from that post in September 2025 amid earlier Epstein-related revelations.
He resigned from the House of Lords earlier this month in the wake of the investigation and has denied criminal wrongdoing. Police have not said whether any charges will be brought.
The misconduct allegations hinge on whether Mandelson improperly shared market-sensitive or confidential government information with Epstein or his associates when he held public office, including during the global financial crisis a decade and a half ago. Misconduct in public office carries a maximum penalty of life imprisonment, though legal experts note the offense is complex and rarely prosecuted.
The arrest is the most serious development yet in the scandal that has already triggered political fallout in the U.K., contributed to the collapse of the advisory firm Mandelson co-founded, and fueled debate over the vetting of public officials with close ties to Epstein.
Further details and charges, if any, have not yet been disclosed as the overseas investigation continues.
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