Three key statements Starmer made to MPs about Mandelson vetting

The prime minister told MPs: "Full due process was followed during this appointment."

On 16 April 2026 it emerged the body that carries out developed vetting - UK Security Vetting (UKSV) - had recommended that Lord Mandelson should not be given security clearance for his ambassador's role.

Sir Olly confirmed to the Foreign Affairs Select Committee on 21 April that he personally approved Lord Mandelson's security vetting clearance and did not tell the prime minister about the initial recommendations of UKSV - which he said was the proper process.

Sir Olly said in a letter to the committee: "When the prime minister informed the House that the proper process had been followed in respect of NSV [National Security Vetting], he was correct."

Liberal Democrat leader Sir Ed Davey has questioned whether due process was followed because Mandelson's security vetting happened after his appointment had been confirmed.

Sir Ed has pointed to a November 2024 letter to the PM from former Cabinet Secretary Sir Simon Case.

In the letter Sir Simon says: "You should give us the name of the person you would like to appoint and we will develop a plan for them to acquire the necessary security clearances and do due diligence on any potential Conflicts of Interest or other issues of which you should be aware before confirming your choice."

Case's successor as cabinet secretary Sir Chris Wormald said in a letter to the Commons public administration committee on 30 October 2025 that such vetting: "Will usually happen after a job offer and before an individual takes up post."

But Sir Olly's predecessor Sir Philip Barton, giving evidence to the Foreign Affairs Committee, said the "the normal order is vetting then announcement".

Another statement mentioned in Tuesday's motion was the prime minister saying on 20 April 2026: "I have made it clear that my position was that the appointment [of Mandelson] was subject to developed vetting [DV]."

Sir Keir had been asked in the Commons about the advice from the cabinet secretary at the time - Sir Simon Case - that vetting should be carried out before the ambassador's appointment was announced.

During his evidence to the Foreign Affairs Select Committee Sir Olly Robbins said: "I am afraid that I do not think at the point of his appointment and for days thereafter it was actually a given that he would be vetted."

Sir Olly also referenced the press release sent on 20 December 2024 which said the prime minister had "confirmed the appointment" of Lord Mandelson.

"The announcement put out on 20 December says that he will be out early in the new year - it does not say, 'subject to vetting'," he said.

The committee was later told, in a letter from the interim top civil servant at the Foreign Office, that there had been discussions between security officials in the department and the Cabinet Office "over whether Lord Mandelson needed DV vetting as a 'Fit and Proper Person' given his membership of the House of Lords".

The letter goes on to say that the settled view on 23 December was that developed vetting was needed.

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