In a Commons statement published by the Government on 20 April 2026, the Prime Minister said Peter Mandelson should not have been appointed as ambassador to the United States. He accepted personal responsibility, apologised again to the victims of Jeffrey Epstein, and said the appointment reflected a ministerial judgement that was wrong. The central disclosure was procedural. The Prime Minister said he learned on Tuesday 14 April 2026 that Foreign Office officials had granted Peter Mandelson Developed Vetting clearance on 29 January 2025 even though UK Security Vetting had recommended the clearance be refused the previous day. According to the statement, that recommendation was not passed to the Prime Minister, the Foreign Secretary, the Deputy Prime Minister in her earlier role, any other minister, or the then Cabinet Secretary, Sir Chris Wormald.
The statement set out a timeline beginning in December 2024, when a new ambassador for Washington was being selected. The Cabinet Office carried out due diligence on Mandelson's suitability, including questions put by Number 10 staff. He responded on 10 December 2024, final advice was provided on 11 December, the appointment decision was taken on 18 December, the public announcement followed on 20 December, and the security vetting process started on 23 December 2024. The Prime Minister said this sequence reflected the rules then in force for a Direct Ministerial Appointment: appointment first, security clearance afterwards, but before the individual formally entered post. He referred to evidence later given to the Foreign Affairs Select Committee by Sir Chris Wormald and Sir Olly Robbins, both of whom described post-appointment clearance as normal for external appointments. What this means in practice is that the Government was operating a system in which a political appointment could be announced before vetting had reached its final conclusion.
According to the Government's statement, UKSV carried out the relevant checks between 23 December 2024 and 28 January 2025, including two interviews with Mandelson. On 28 January 2025, UKSV advised the Foreign Office that Developed Vetting should be denied. On 29 January 2025, Foreign Office officials nevertheless decided to grant that level of clearance. That administrative detail is significant. The Prime Minister said UKSV decisions are binding for many departments, but that the Foreign Office had retained final authority over Developed Vetting decisions in its own cases. He added that this authority had now been suspended. For Whitehall process, the issue is not only the substance of one appointment, but whether a department should be able to depart from specialist vetting advice without an automatic requirement to notify senior ministers or the Cabinet Office.
A further part of the statement dealt with confidentiality. The Prime Minister accepted that detailed personal information supplied during vetting must be protected, because the system depends on candour and secure handling of sensitive material. He rejected, however, the suggestion that ministers could not be told that UKSV had recommended refusal. The distinction he drew is between personal data and process-critical advice. In the Government's account, officials could have alerted ministers to the adverse recommendation without disclosing the detailed material that informed it. The Prime Minister said there is no legal bar preventing civil servants from conveying that limited fact in a way that protects confidentiality. He also stated plainly that, had he been told before Mandelson entered post, he would not have proceeded with the appointment.
The statement then moved to September 2025, when Bloomberg published further reporting on Mandelson's history with Epstein. The Prime Minister said that reporting made clear to him that Mandelson's answers during the earlier due diligence exercise had not been truthful, and that Mandelson was therefore dismissed from the ambassadorial post. The Prime Minister said he changed the Direct Ministerial Appointment process at that point. The new approach, as described in the statement, requires fuller due diligence as standard, a pre-appointment discussion where risks or conflicts are identified, a summary for the appointing minister, and completion of security vetting before a public announcement is made. Those changes matter because they show that the Government had already identified a weakness in the earlier model: the gap between a public appointment decision and the completion of formal checks.
A second process failure concerns the review carried out in September 2025 by the then Cabinet Secretary, Sir Chris Wormald. The Prime Minister said Sir Chris wrote to him on 16 September 2025 concluding that appropriate processes had been followed in the appointment and subsequent withdrawal of the former ambassador. Last week, however, Sir Chris said that when he conducted that review he had not been told that UKSV had recommended denial of Developed Vetting. The result is clear. A review commissioned to test whether the process had worked was carried out without one of the most material facts in the case. In the Prime Minister's account, that omission was not a minor technical error but a failure of escalation and record-sharing. It also raises a wider administrative question about how internal reviews are scoped, what departments must disclose, and whether central oversight can operate properly if key recommendations are withheld.
The same date, 16 September 2025, also saw a signed submission from the Foreign Secretary and Sir Olly Robbins to the Foreign Affairs Select Committee. The submission said UK Security Vetting had carried out the vetting on behalf of the Foreign, Commonwealth and Development Office and that Developed Vetting clearance had been granted by the department before Mandelson took up post. It also said the vetting had been conducted to the usual standard under established Cabinet Office policy. In the Commons statement, the Prime Minister said the Foreign Secretary had been advised on, and allowed to sign, that submission without being told that UKSV had recommended refusal. For parliamentary accountability, that point is particularly serious. A minister answering a select committee is expected to be in possession of the relevant departmental position, especially where the committee is asking whether concerns were raised and how the department responded.
The Prime Minister said that after further revelations in February 2026 he instructed officials to review the national security vetting process, while still being unaware that UKSV had advised against clearance in Mandelson's case. He told the House that he learned that fact only on 14 April 2026 and immediately ordered Downing Street and Cabinet Office officials to establish who had made the decision, on what basis, and who had known. He also told MPs that the Government would comply fully with the Humble Address motion passed on 4 February 2026. In addition, the terms of reference for the security vetting review have been widened so that it now covers how decisions are made across the system, not only the formal UKSV process. Sir Adrian Fulford has been appointed to lead that review, while the Cabinet Office Government Security Group has been asked to examine any security concerns that arose during Mandelson's period in post.
The closing argument of the statement was directed at the machinery of government rather than the wider Civil Service. The Prime Minister said this was not a criticism of the many officials who serve with integrity, including Foreign Office staff working on active international files, but of a sequence of decisions in which material information was not passed to the people responsible for ministerial decision-making, central review and parliamentary disclosure. For policy readers, the case now turns on whether departments will retain any discretion to depart from UKSV advice in senior appointments, whether an adverse vetting recommendation must in future be escalated automatically to the appointing minister and the Cabinet Office, and whether Parliament will receive a fuller documentary record explaining how Mandelson was cleared, what was withheld and why. On the Prime Minister's own account, the failure was not only one of judgement. It was also a failure of process, escalation and accountability.