Lord Mandelson failed initial security checks before US ambassador role

Mandelson reached Washington only after officials in the Foreign, Commonwealth and Development Office overruled a Developed Vetting denial from UK Security Vetting. The decision was taken in late January 2025, and it has become far more damaging because Mandelson later lost the post over his ties to Jeffrey Epstein, while Starmer and ministers say they did not know about the override until this week.

Britain’s clearance system starts with BPSS, the baseline pre-employment screen. That checks identity, right to work, employment history and unspent criminal convictions, and a formal offer can only be made once BPSS is passed. Only then does national security vetting begin, with levels that include Counter Terrorist Check, Security Check and Developed Vetting. DV is the most intrusive routine level and adds departmental record checks, a security questionnaire, criminal-record checks, credit reference checks, Security Service checks, an internet questionnaire, a financial questionnaire and an interview with a vetting officer.

So what did “did not pass initial checks” mean in practice? It meant the clearance process reached a negative decision before the appointment could proceed normally, because the risks were judged too high for the role as assessed. For people already in government, the route after a refusal runs through the organisation’s internal appeal mechanism and then to the Security Vetting Appeals Panel, which can recommend that clearance stand, be granted, restored or rerun. But the panel is not available to candidates whose applications are rejected on security grounds, which is why the Foreign Office’s override in Mandelson’s case mattered so much.

That is the central question now facing ministers: whether this was a routine clearance dispute that a department resolved, or a serious breakdown in a process meant to stop sensitive appointments when the vetting agency says no. The government’s own guidance makes clear that BPSS is only the start, and that a failed DV recommendation is supposed to trigger scrutiny, not quiet acceptance.