Key takeaways from senior official on Mandelson vetting

Security clearance process under scrutiny

Cat Little, the Cabinet Office’s highest-ranking civil servant, testified before the Commons foreign affairs committee regarding the vetting of Lord Mandelson. Despite concerns from vetting officials, the peer received security clearance for the UK ambassador role to the United States. This decision was later challenged when new details surfaced about his connection to Jeffrey Epstein, a convicted sex offender, leading to his dismissal in September 2025.

Little’s testimony followed Sir Olly Robbins’ account, who was recently removed as the Foreign Office’s chief civil servant. Robbins claimed his department faced persistent pressure to expedite the vetting process, as Downing Street wanted Mandelson appointed swiftly. Yet, he maintained that his team adhered to the procedure.

“My view is that due process was followed… because the process as I’ve outlined to the committee, is that UKSV make a recommendation, and the Foreign Office make a decision as to whether to grant DV [developed vetting].” — Cat Little

Little emphasized that civil servants act as ministers’ representatives during committee hearings. As Helen MacNamara, a former senior official, noted: “Cat Little can’t sit before the committee and say what she thinks, or what her own personal opinion is. Her literal job is to sit there and say exactly what she’s been told to say by her ministers.”

Little confirmed that the Cabinet Office conducted a due diligence review prior to Mandelson’s appointment. This assessment highlighted reputational risks, including his ongoing ties to Epstein post-conviction and past resignations during the last Labour government. The report also flagged potential conflicts involving clients of his Global Counsel lobbying firm and their interactions with UK or US authorities.

When questioned about whether Mandelson’s vetting file might have included undisclosed information, Little stated she could not confirm specifics. However, she acknowledged the possibility of additional details in the file.

MPs pushed for transparency earlier this year through a humble address motion. Little, tasked with overseeing document releases, sought a summary of the vetting agency’s recommendation and the Foreign Office’s decision. She was informed that such information would not be available, prompting her to request it directly from security officials on 25 March. The data was shared with the prime minister only on 14 April, after she consulted legal counsel.

Starmer reiterated on 10 September 2025, the day before Mandelson’s sacking, that “full due process” was completed for his appointment. He claimed to have been unaware of the Foreign Office’s decision to grant clearance against UKSV advice at the time. Opposition leaders argue this suggests a lack of transparency, but Starmer maintains his position.