The British government is set to release a second set of documents concerning the appointment of Peter Mandelson as U.S. ambassador. Mandelson, once the ambassador to the United States, was dismissed from this role due to connections with Jeffrey Epstein, a convicted sex offender.

Keir Starmer, the British prime minister, is facing increased scrutiny with the anticipated disclosure of numerous documents linked to Mandelson. In a crisis for the British government, Mandelson was dismissed last year when leaked emails revealed the extent of his relationship with Epstein, which led to a political scandal.

Opposition lawmakers had previously demanded the release of documents, exposing that vetting officials advised against granting Mandelson top-level security clearance for the ambassador role. Despite these recommendations, the Foreign Office overruled this advice, sparking controversy.

Starmer stated he was deceived by Mandelson regarding his ties to Epstein and was unaware of the security clearance concerns. This controversy led to the dismissal of Olly Robbins, the former top official at the Foreign Office, which further destabilized Starmer’s leadership both as prime minister and within the Labour Party.

Starmer’s political standing took a hit after disappointing local election results and the resignation of a cabinet minister, Wes Streeting. Speculation about a potential leadership challenge surfaced, with Andy Burnham, Manchester’s mayor, positioning himself as a possible contender if successful in a parliamentary election.

The forthcoming documents are expected to reveal communications related to Mandelson’s tenure as the ambassador, including emails and messages with senior British government members. Mandelson, who assumed the diplomatic post in February 2025 and was terminated in September of the same year, is also under criminal investigation. Allegations suggest he leaked confidential government information to Epstein during a previous Labour government from 2009 to 2010. Mandelson denies any criminal activity and is cooperating with authorities; he was arrested and released on bail earlier this year without charges.

The government assured opposition lawmakers that all relevant documents would be accessible, except those withheld at the police’s request for their investigation. Some documents may be redacted for reasons of national security or international relations, or to protect the identities of junior officials.