The Foreign Office (FCDO) is “working urgently” to comply with Sir Keir Starmer’s request to establish the facts around Lord Peter Mandelson’s security vetting for him to become the UK’s ambassador to the US.
A spokesman for the FCDO said: “The Prime Minister has initiated a process to establish the facts of the granting of developed vetting and we are working urgently to comply with that process.”
The Foreign Affairs Select Committee is intending to summon senior civil servant, Sir Oliver Robbins, over his previous evidence on the vetting process for Lord Mandelson.
Emily Thornberry, committee chair, said: “Looking at the evidence that was given and the letters that have been written, to be charitable, there are glaring holes. It really is a question of whether we were knowingly misled.”
This comes after a Government spokesman confirmed Lord Mandelson failed security vetting but has said Sir Keir Starmer was not “aware” the clearance had been granted.
In a statement, they said: “The security vetting process for Peter Mandelson was sponsored by the FCDO. The decision to grant Developed Vetting to Peter Mandelson against the recommendation of UK Security Vetting was taken by officials in the FCDO.
“Neither the Prime Minister, nor any Government Minister, was aware that Peter Mandelson was granted Developed Vetting against the advice of UK Security Vetting until earlier this week.
“Once the Prime Minister was informed he immediately instructed officials to establish the facts about why the Developed Vetting was granted, in order to enact plans to update the House of Commons.”
This comes after the Guardian revealed Lord Mandelson had been granted developed security clearance despite failing the vetting before he was appointed the UK’s chief diplomat to the US.
Lord Mandelson has declined to comment.
However, a friend of the peer told GB News: “Peter has absolutely no knowledge of this matter. This is the first he has heard of it.
“No one at any level, raised or explored any subject further with him following the vetting interview process and no issue has been raised with him since.”
Foreign Office ‘Working Urgently’ on Starmer’s Order to Uncover Truth of Lord Mandelson Vetting Scandal
The British government has faced mounting questions over the appointment of Lord Peter Mandelson as ambassador to the United States after revelations about the security vetting process triggered a major political controversy. Prime Minister Keir Starmer has demanded answers about how the appointment was approved, why concerns raised by security officials were overridden and whether ministers were given the information they needed to make informed decisions.
The Foreign Office has said it is working urgently to establish the facts, as the affair raises questions about accountability, the handling of sensitive information and the relationship between ministers and senior civil servants.
At the centre of the controversy is the discovery that Mandelson was recommended for refusal of developed security vetting in January 2025, yet Foreign Office officials subsequently granted him clearance. The government has said that neither Starmer nor any government minister knew at the time that the recommendation had been overridden. The revelation has intensified scrutiny of the appointment and prompted calls for greater transparency.
The issue is politically sensitive because the ambassadorial role in Washington is one of Britain’s most important diplomatic positions. It also comes amid wider scrutiny of Mandelson’s relationship with the late financier Jeffrey Epstein, a convicted sex offender.
For Starmer, the immediate challenge is to establish precisely what happened, explain why the relevant information was not communicated to ministers and demonstrate that the government’s procedures are capable of protecting national security.
How the Mandelson Appointment Became a Political Crisis
Mandelson was announced as Britain’s next ambassador to the United States in December 2024. His extensive political experience and connections were presented as valuable assets for a role requiring close engagement with the incoming American administration.
However, the appointment subsequently came under intense scrutiny because of his past relationship with Epstein.
Mandelson was dismissed from the ambassadorial position in September 2025 after further information about that relationship emerged. He later resigned from the Labour Party and stepped down from the House of Lords as questions surrounding his conduct intensified.
The controversy took a new turn in April 2026 when reporting revealed that he had failed the initial developed-vetting process before taking up the diplomatic post.
According to the government’s account, UK Security Vetting recommended on 28 January 2025 that developed security clearance should be denied. The following day, Foreign Office officials decided to grant clearance despite that recommendation.
This distinction is central to the scandal. The issue was not simply that the security checks took place after Mandelson’s appointment had been announced. It was that officials reached a decision contrary to the recommendation of the security-vetting team.
The Foreign Office possessed the authority to make the final decision in these circumstances. However, the existence of that authority has raised questions about why it was exercised, who was responsible and whether the relevant risks were properly assessed.
The government has said Starmer was not informed of the adverse recommendation at the time. The Prime Minister has insisted that he would not have proceeded with the appointment had he known the recommendation had been to deny clearance.
Why Is the Foreign Office Working Urgently?
Starmer’s request to establish the facts reflects the seriousness of the questions raised by the revelations.
Security vetting is intended to help determine whether an individual can be trusted with access to sensitive government information. It involves confidential checks and assessments designed to identify potential vulnerabilities, risks or concerns.
A recommendation to deny clearance does not automatically establish that an individual has committed a crime or poses a proven security threat. Nevertheless, such a recommendation is a significant warning that requires appropriate consideration.
The central question is why the recommendation in Mandelson’s case was overridden and what information was considered before the final decision was made.
Investigators must establish which officials participated in the decision, what advice they received and whether the established procedures were followed. They must also determine what information was communicated to the ministers responsible for the appointment.
Another important question concerns the timing of the disclosure. If senior officials knew that the vetting recommendation had been overridden, why was that information not made available when the appointment and its approval were subsequently discussed?
The government has said it wants the facts established so that Parliament can be properly informed. This requires an accurate chronology of events rather than assumptions based on incomplete information.
Sir Olly Robbins and Questions of Accountability
The controversy led to the departure of Sir Olly Robbins, the Foreign Office’s most senior civil servant.
His departure followed the emergence of information about the decision to grant Mandelson security clearance despite the recommendation from UK Security Vetting. Starmer and Foreign Secretary Yvette Cooper had lost confidence in Robbins, according to reporting at the time.
The development raised wider questions about the responsibilities of senior civil servants when handling sensitive appointments.
Civil servants are expected to provide ministers with accurate information, administer government procedures and identify significant risks. Ministers, in turn, are responsible for political decisions and must be able to rely on the information supplied by their departments.
When a major decision becomes controversial, establishing individual responsibility is essential. However, it is also necessary to distinguish between a procedural failure, a poor judgment and deliberate misconduct. These are different matters and should not be treated as interchangeable without evidence.
The investigation therefore needs to examine not only who made the decision but also the systems that allowed it to happen.
If existing procedures gave officials the authority to override security recommendations without ensuring that the relevant minister was informed, that could indicate a structural weakness requiring reform.
If the procedures were adequate but were not followed, the response may need to focus on compliance, accountability and individual responsibility.
What Did Keir Starmer Know?
One of the most politically consequential questions is what Starmer knew about Mandelson’s vetting and when he knew it.
The Prime Minister has maintained that he was not informed of the recommendation to deny clearance before Mandelson took up the ambassadorial role. He has also said that he would not have proceeded with the appointment if that information had been available to him.
Opposition politicians have challenged the government’s account, arguing that the circumstances surrounding the appointment require a full explanation.
The distinction between knowing that security vetting had been completed and knowing that the vetting team had recommended refusing clearance is particularly important.
A statement that an individual had received clearance can be technically accurate while leaving unanswered questions about how the decision was reached. Equally, the existence of an adverse recommendation does not by itself establish that a minister knowingly misled Parliament.
The evidence must determine the answer.
Relevant documents, official correspondence, meeting records and testimony from those involved can help establish what information was available and when it was communicated.
The government must also explain whether the procedures governing confidential security information prevented officials from disclosing the recommendation or whether it could have been shared with ministers without revealing sensitive personal details.
Starmer has argued that the recommendation could and should have been communicated to him while preserving the confidentiality of the vetting process.
That question goes to the heart of the affair: whether the system adequately balanced confidentiality with ministerial accountability.
Parliament Demands Answers
The Foreign Affairs Select Committee has examined the appointment and the circumstances surrounding Mandelson’s vetting.
In July 2026, the committee reported that significant questions remained unanswered despite extensive testimony and the release of more than 1,500 pages of documents. It concluded that the usual checks and balances had not been followed and called for public appointments not to be announced or made before the appropriate security clearance had been granted.
The committee’s findings underline the need to establish how the appointment proceeded and what safeguards were missing or ineffective.
Parliamentary scrutiny is important because decisions involving national security and senior diplomatic appointments cannot be assessed solely through statements from the government or the officials involved.
MPs need sufficient information to evaluate the process, identify failures and determine whether changes are necessary.
At the same time, some information involved in security vetting must remain confidential. The challenge is to provide meaningful accountability without unnecessarily exposing sensitive personal information or compromising the integrity of future vetting procedures.
A transparent investigation should therefore explain the decision-making process, identify relevant institutional failures and set out corrective measures, while protecting information that genuinely requires confidentiality.
The Wider Epstein Connection
The vetting scandal has also renewed attention on Mandelson’s relationship with Epstein.
Mandelson has previously expressed regret over maintaining the relationship and has denied criminal wrongdoing. Separately, British authorities have investigated allegations concerning possible misconduct in public office linked to communications involving Epstein. An investigation or arrest on suspicion does not establish guilt.
The connection has made the appointment especially controversial because the ambassadorial role involved access to sensitive information and required confidence in the judgment of the person appointed.
However, the security-vetting decision and the separate allegations concerning Epstein must be examined on their own evidence.
The fact that a person maintained a controversial relationship does not, by itself, prove that every subsequent decision involving that person was improper. Equally, the seriousness of a diplomatic appointment makes it reasonable to scrutinise whether all relevant information was considered before clearance was granted.
The government must establish what was known during the appointment process, what concerns were identified and whether the relevant decision-makers received adequate advice.
What Changes Could Follow?
The scandal has already prompted changes to the procedures governing senior appointments and security clearance.
Starmer said in his statement to Parliament on 20 April 2026 that the government had changed the process so that appointments could not be announced before security vetting had been completed. He also commissioned a further review of national security vetting, led by Sir Adrian Fulford, to examine the process and how decisions were made.
These changes are intended to reduce the risk of similar situations arising in the future.
However, preventing another controversy will require more than changing the order in which appointments are announced and security checks are completed.
The government must also establish clear rules governing who can override a vetting recommendation, what justification is required and who must be informed when such a decision is made.
There should be a reliable record of the reasoning behind exceptional decisions. Where a senior appointment involves significant national security responsibilities, ministers should receive enough information to understand the material risks before making or confirming their decisions.
The system must also protect the confidentiality of applicants and ensure that security assessments are based on evidence rather than political pressure.
A successful reform programme would balance those requirements while making responsibility for decisions easier to establish.
Conclusion: The Search for Truth Continues
The Mandelson vetting scandal has become a significant test of accountability within the British government.
The revelation that security officials recommended denying clearance, only for the Foreign Office to grant it, has raised questions about the decision-making process, the responsibilities of senior civil servants and the information available to ministers.
Starmer has said he was not informed of the adverse recommendation and would not have proceeded with the appointment had he known. The government has ordered investigations and reviews, while Parliament has identified unanswered questions and called for stronger safeguards.
The essential task now is to establish a complete and reliable account of what happened. That means determining who made the decision, why the recommendation was overridden, what officials communicated to ministers and whether the procedures in place were adequate.
The findings should be judged on evidence rather than political accusations. If individuals failed to meet their responsibilities, the evidence should establish what went wrong and what consequences are appropriate. If the problem arose from weaknesses in the system, those weaknesses must be addressed.
Ultimately, the affair is about more than one ambassadorial appointment. It concerns the way sensitive government decisions are made, the ability of ministers to exercise informed oversight and the public’s confidence that national security procedures are applied responsibly.
The Foreign Office’s work to establish the facts is therefore an important part of a wider effort to restore confidence in the appointment process. Whether that effort succeeds will depend on the completeness of the investigation, the clarity of the government’s explanations and its willingness to implement meaningful reforms.