What was the vetting process for Mandelson's appointment as US ambassador?

Prime Minister Sir Keir Starmer has accused Lord Mandelson of lying during the vetting process for his appointment as the UK's ambassador to the US, which included discussions about Mandelson's continued relationship with convicted sex offender Jeffrey Epstein. The vetting process, a two-stage procedure involving due diligence and security vetting, was conducted to identify reputational risks and ensure Mandelson's suitability for the role. The due diligence check, carried out by the Cabinet Office, reviewed public information and identified Mandelson's relationship with Epstein as a reputational risk. Following this, Mandelson was asked to address specific questions about his contact with Epstein, which were deemed sufficient for him to proceed to security vetting. The security vetting process, managed by the UK Security Vetting agency, is the most intrusive level of background check required for access to secret government information. It involves detailed questionnaires, financial and criminal record checks, and an interview covering personal and professional history. Despite the thorough process, Mandelson was appointed in December 2024 but was sacked less than a year later after new emails revealed the extent of his relationship with Epstein. The government has since faced scrutiny over the adequacy of the vetting process and the information available at the time of Mandelson's appointment.