A former top civil servant has accused Downing Street of displaying a "dismissive attitude" toward security vetting procedures during the appointment of Lord Peter Mandelson as UK ambassador to the United States. Sir Olly Robbins, who was recently dismissed as head of the Foreign Office, defended his department's handling of the peer's security clearance before a parliamentary committee, alleging that Number 10 exerted "constant pressure" to expedite the appointment.
Sir Olly testified that his predecessor had been briefed that Downing Street officials believed vetting "might be unnecessary" for someone of Mandelson's stature—a member of the House of Lords and a privy councillor. "There was clearly a dismissive approach to the process," he stated, though he maintained that the Foreign Office had "put its foot down" and insisted on conducting the checks.
The controversy centers on Mandelson's developed vetting (DV) clearance, which was granted in early 2025 shortly after his ambassadorial appointment was announced in December 2024. Sir Olly revealed that UK Security Vetting (UKSV), the government agency responsible for the process, had initially considered Mandelson a "borderline case" and leaned toward recommending denial of clearance. However, Foreign Office security officials assessed that the identified risks could be managed, leading to the clearance being approved.
"I was confident that we were handling it well and had not bowed to pressure," Sir Olly told MPs, while acknowledging there was "strong expectation" from Downing Street that Mandelson needed to be "in post and in America as quickly as humanly possible."
Prime Minister Sir Keir Starmer told Parliament on Monday that he had not been informed about the vetting concerns at the time, calling the situation "incredible." He insisted that "full due process" had been followed but acknowledged he would have acted differently had he known about UKSV's reservations.
A Downing Street spokesperson rejected Sir Olly's characterization of their stance, stating: "There's clearly a difference between asking for updates on an appointment and the idea of... being dismissive about vetting."
Sir Olly defended his decision not to inform the prime minister about the specific vetting concerns, arguing that sharing such details would violate established protocols. "I believe very strongly I had an obligation not to do that," he explained. "You are not supposed to share the findings and reports of UKSV, other than in the exceptional circumstances where doing so allows for the specific mitigation of risk."
Lord Mandelson served as ambassador for seven months before being dismissed in mid-2025 when additional details emerged about his previous friendship with the late convicted sex offender Jeffrey Epstein. Sir Olly clarified that UKSV's initial concerns did not relate to the Epstein connection, though he did not specify what issues were raised.
The testimony has sparked renewed scrutiny of government appointment procedures and the balance between political expediency and security protocols in high-level diplomatic postings.