Keir Starmer is facing furious demands to quit tonight after Downing Street admitted Lord Mandelson was made Britain’s ambassador to the US despite failing security checks.
In an astonishing development, No10 revealed Lord Mandelson was given the go-ahead to take on the role against the recommendation of security vetting officials.
The Foreign Office is said to have pushed ahead with appointing Lord Mandelson as the UK’s top diplomat in Washington DC despite the advice.
Downing Street claimed neither the Prime Minister nor any other Government minister was aware until Tuesday evening, at which point Sir Keir immediately ordered a Whitehall probe.
However, it only emerged that Lord Mandelson had failed security vetting when The Guardian newspaper published explosive claims on Thursday afternoon – with No10 remaining silent for nearly three hours.
Sir Keir is facing a fresh storm over his claim in February that Lord Mandelson’s security vetting process ‘gave him clearance for the role’.
The PM is also accused of misleading Parliament over his previous statement that ‘full due process’ was followed.
Tory leader Kemi Badenoch said: ‘The Prime Minister appointed Peter Mandelson before the vetting had been completed, vetting Mandelson failed.
‘Starmer then said full due process was followed. THAT is misleading Parliament.
‘I’m only holding him to the same standards to which he’s held previous Prime Ministers – that if they mislead parliament, they should resign.
‘In these dangerous times, Britain cannot afford to have a Prime Minister who the country doesn’t trust. Starmer has betrayed our national security. He should go.’
Lord Mandelson is said to have been initially denied clearance in January 2025 – weeks after the Prime Minister had officially announced his appointment
Keir Starmer is facing a growing clamour to quit amid claims Lord Mandelson failed security vetting before being made US ambassador
Tory leader Kemi Badenoch said Sir Keir ‘misled the House’ over Mandelson’s vetting process
Nigel Farage said the PM had ‘blatantly lied’ and should resign
A three-page ‘due diligence’ report supplied to Sir Keir on December 11, 2024 flagged the ties between Mandelson and Epstein
Reform’s Nigel Farage said: ‘Now we discover that he has blatantly lied, the Prime Minister should resign.’
Lib Dem leader Ed Davey also called for the PM’s resignation. ‘Keir Starmer had already made a catastrophic error of judgement,’ he said.
‘Now it looks as though he has also misled Parliament and lied to the British public. If that is the case, he must go.’
No10 sources said information about Lord Mandelson’s vetting was obtained by officials trawling through documents as the Government scrambles to comply with MPs’ demand for the publication of all files related to his appointment as ambassador.
A Government spokesperson 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.
‘The Government is committed to complying with the Humble Address in full as soon as possible. Any documentation within the scope of the Humble Address that requires redaction on the basis of national security or international relations will be provided to the ISC. This will include documents provided to the FCDO by UK Security Vetting.’
The apparent refusal to sign off on Mandelson has not previously been revealed, despite the Government being forced by MPs to release of a batch of documents about the process. It is not clear whether it was because of his ties to paedophile Jeffrey Epstein.
Sir Keir previously insisted Mandelson was subject to ‘security vetting, carried out independently by the security services, which is an intensive exercise that gave him clearance for the role’.
The claims risk reviving the furore that already came close to exploding Sir Keir’s premiership in February.
Labour MPs have been up in arms that Lord Mandelson was given the key job despite long-standing ties to Epstein.
The Guardian cited multiple sources for the claim, and it is not known whether the PM was aware his pick for ambassador had not been approved by the UKSV agency.
It is understood Lord Mandelson is adamant that he did not know he had been rejected until the reports today.
It is also not clear who in the Foreign Office made the apparent decision to overrule UKSV.
Olly Robbins is believed to have been the permanent secretary at the Foreign Office at the time, while Deputy PM David Lammy was Foreign Secretary.
Senior Labour MP Emily Thornberry, the chair of the House of Commons’ Foreign Affairs Committee, said she would summon Sir Olly to clarify information he gave it at a previous hearing.
She said: ‘My committee asked several times whether red flags had been raised by Peter Mandelson’s vetting process. It seems there were.
‘Who overrode these concerns? Why were we kept in the dark? People need to stop messing us about and tell us the truth.’
Developed vetting is standard for most mid-level diplomatic staff. An outright refusal of clearance is believed to be quite rare, although ‘mitigations’ can be requested.
In another potentially incendiary claim, the Guardian said senior Government officials have been considering whether to withhold documents about the refusal from Parliament.
Labour MPs rebelled to insist on the publication of a huge range of material about the process, and the cross-party Intelligence and Security Committee (ISC) is meant to be having the final say on what is too sensitive for publication.
The Daily Mail understands no document showing that vetting clearance was initially refused has been supplied to the ISC so far.
Asked about his appointment of Lord Mandelson during a press conference in East Sussex on February 5, Sir Keir said: ‘There was a due diligence exercise that culminated in questions being asked because I wanted to know the answer to certain issues.
‘That’s why those questions were asked. The answer to those questions were not truthful.
‘There was then, I should add, security vetting carried out independently by the security services, which is an intensive exercise that gave him clearance for the role, and you have to go through that before you take up the post.
‘Clearly, both the due diligence and the security vetting need to be looked at again.
‘I’ve already strengthened the due process. I think we need to look at the security vetting because it now transpires that what was being said was not true. And had I known then, what I know now, I’d never have appointed him in the first place.’
On September 16 last year, Yvette Cooper – by then Foreign Secretary – and Sir Olly wrote to the Foreign Affairs Select Committee in response to questions about the vetting.
‘Peter Mandelson’s security vetting was conducted to the usual standard set for developed vetting in line with established Cabinet Office policy,’ the letter said.
However, it did not mention that UKSV had initially refused clearance.
Labour MP Bell Ribeiro-Addy said: ‘The Government must come clean about why the Foreign Office overrode security officials’ decision to deny Mandelson clearance.
‘This scandal has been beyond damaging, as has the Government’s handling of it. We need the full facts.’
Fellow Labour backbencher Rachael Maskell said: ‘All we want is the truth.
‘Now a different account of Mandelson’s security clearance has been brought to light we need accountability as to why we were provided a different version of events.’
The Prospect union, which represents vetting officers at UKSV, accused No10 of allowing the ‘impression to circulate’ that people had not done their jobs properly.
General Secretary Mike Clancy said: ‘It is deeply unfortunate that following the resignation of Morgan McSweeney Downing Street allowed the impression to circulate that the vetting of Peter Mandelson had not been done correctly by UK Security Vetting.
‘Not only were UKSV put in an invidious position by being asking to conduct vetting after an appointment had been announced, but now deeply troubling reports have appeared in in the media claiming that UKSV advice was overruled.
‘Civil Servants, particularly those working in the most sensitive parts of government cannot speak publicly, and deserve ministers to take responsibility for the decisions they take and not to seek to deflect blame onto them.’
Senior Tory MP David Davis suggested Sir Keir must have known if Mandelson had failed his security vetting.
The ex-Cabinet minister posted on X: ‘In what sort of Government does the Foreign Office override a vetting failure for the most senior ambassadorship in the world without notifying the Prime Minister?
‘It must be presumed that Starmer knew of this vetting failure when he officially appointed him.
‘Frankly, this calls into question the Prime Minister’s claims that he made the decision because Mandelson had lied to him, since he would have had the accurate conclusions of the vetting process when he made the decision.’
It previously emerged that Sir Keir did not speak to Mandelson personally before appointing him as US ambassador.
The PM is said to have left his aides to ask questions about his ties to Epstein.
That was despite being presented with evidence that Mandelson’s friendship with the financier had continued after he was jailed.
National security adviser Jonathan Powell also expressed misgivings during the process.
However, Sir Keir went ahead, after apparently agreeing with chief of staff Morgan McSweeney on three questions that Mandelson needed to be asked.
Mr McSweeney resigned in February saying he took full responsibility for the appointment going ahead.
Mandelson was arrested on February 23 on suspicion of misconduct in public office, having been accused of passing sensitive information to Epstein during his time as business secretary under Gordon Brown.
He was subsequently bailed, but later handed his passport back and freed under investigation. He has denied any criminal wrongdoing or acting for personal gain.
