Politics·4/19/2026AI summary Foreign Office Overruled UKSV Decision to Deny Peter Mandelson Top-Secret Security Clearance
Keir Starmer appointed Peter Mandelson as UK ambassador to the US in December 2024. UKSV, the Cabinet Office agency responsible for security vetting, concluded in late January 2025 that Mandelson should not receive Developed Vetting (DV) clearance required for frequent access to top-secret material. However, the Foreign Office overruled this decision and granted the clearance anyway, allowing Mandelson to take up the Washington post. A prior due diligence check by the Foreign Office's propriety and ethics team had warned of "general reputational risk" in the appointment. The reasons for UKSV's rejection have not been made public.