A Guardian investigation has uncovered that Peter Mandelson failed a security vetting process in January 2025, but the Foreign Office overruled the decision to deny him clearance ahead of his appointment as UK ambassador to the US. The revelation has led to the departure of Sir Olly Robbins, the top civil servant at the Foreign, Commonwealth and Development Office (FCDO).
According to multiple sources, Mandelson failed a developed vetting check conducted by UK Security Vetting (UKSV), a Cabinet Office division. However, FCDO officials used a rarely invoked authority to override the recommendation, allowing Mandelson to take up the role. Prime Minister Keir Starmer has insisted he was unaware of the initial denial until this week, prompting him to order an investigation.
Downing Street stated that no minister knew Mandelson was granted clearance against UKSV advice until earlier this week. A spokesperson said the prime minister was 'furious' upon learning of the decision and immediately instructed officials to establish the facts. The government has pledged to update the House of Commons and comply with a parliamentary motion to release all documents related to Mandelson's appointment.
The controversy has sparked political backlash, with Conservative leader Kemi Badenoch and Liberal Democrat leader Ed Davey calling for Starmer's resignation if he misled parliament. The Guardian also reports that senior officials have debated withholding some vetting documents from the Intelligence and Security Committee, potentially breaching the parliamentary order.
Sir Olly Robbins, who became FCDO permanent secretary in early 2025, was told to resign after Starmer and Foreign Secretary Yvette Cooper lost confidence in him. The identity of the official who made the decision to overrule UKSV remains unknown.
