U.K. Prime Minister Keir Starmer leaves Downing Street on February 02, 2026 in London, United Kingdom.
Alishia Abodunde | Getty Images News | Getty Images
British Prime Minister Keir Starmer’s chief of staff resigned Sunday over the furor surrounding the appointment of Peter Mandelson as the U.K. ambassador to the U.S. despite his ties to Jeffrey Epstein.
Morgan McSweeney said he took responsibility for advising Starmer to appoint Mandelson, 72, to Britain’s most important diplomatic post in 2024.
“The decision to appoint Peter Mandelson was wrong. He has damaged our party, our country and trust in politics itself,” McSweeney said in a statement. “When asked, I advised the Prime Minister to make that appointment and I take full responsibility for that advice.”
Starmer is facing a political storm and questions about his judgment after newly published documents, part of a huge trove of Epstein files made public in the United States, suggested that Mandelson sent market-sensitive information to the convicted sex offender when he was the U.K. government’s business secretary during the 2008 financial crisis.
Starmer’s government has promised to release its own emails and other documentation related to Mandelson’s appointment, which it says will show that Mandelson misled officials.
Mandelson, a former Cabinet minister, ambassador and elder statesman of the governing Labour Party, has not been arrested or charged.
Metropolitan Police officers searched Mandelson’s London home and another property linked to him on Friday. Police said the investigation is complex and will require “a significant amount of further evidence gathering and analysis.”
Starmer had fired Mandelson in September from his ambassadorial job over earlier revelations about his Epstein ties. But critics say the emails recently published by the U.S. Justice Department have brought serious concerns about Starmer’s judgment to the fore. They argue that he should have known better than to appoint Mandelson in the first place.