Key questions over Mandelson vetting: did ‘mitigations’ cover links to China and Russia?

Why was his case said to be ‘borderline’ and was national security compromised during his time as ambassador?

Ever since the Guardian revealed last month that Peter Mandelson was given security clearance against the advice of the UK government’s vetting agency, one question has dominated in Westminster.

What were the concerns that led United Kingdom Security Vetting (UKSV) to tell the Foreign Office that his clearance should be denied in late January 2025, weeks before he was due to take up his post as ambassador to Washington?