Security Vetting

Emily Thornberry Excerpts

Monday 20th April 2026 Commons Chamber

[Emily Thornberry (Islington South and Finsbury) (Lab)]

The truth is that my Committee did ask. We asked on the record, and we got a partial truth that could hardly be the whole truth. We are on record as asking the very questions that hecklers on the Opposition Benches say should have been asked. The answers are there, on the record; people can see what we got when we did ask.

A month before Mandelson’s appointment was announced, the then Cabinet Secretary advised that the necessary security clearance should be acquired before a political appointment was confirmed. That does not seem to have been the usual practice. I am glad that it has changed, because the process was clearly abused. Someone—probably Peter Mandelson himself—leaked his appointment as US ambassador to the press, which effectively bounced the Government into confirming it. When the confirmation of his appointment came forward, neither the offer letter to Peter Mandelson nor the Government’s press release made it clear that the appointment was subject to vetting. Does it not look as though, for certain members of the Prime Minister’s team, getting Peter Mandelson the job was a priority that overrode everything else, and security considerations were very much second order?

[The Prime Minister]

I thank my right hon. Friend for her question. Her Committee did ask relevant questions, and that is why I have indicated that it was unforgivable that the Foreign Secretary was asked to sign a statement in response to those very questions without being told about the recommendation. The questions were asked; the Foreign Secretary was advised and asked to sign a statement without being told the relevant information. That is unforgivable. As for the appointment before developed vetting, I have changed that process now, so that it can never happen again; my right hon. Friend the Committee Chair heard me quote the evidence of the former Cabinet Secretary and the former permanent secretary in relation to that.

Let me deal with my right hon. Friend’s third point, which is that somehow Downing Street’s wish to appoint Peter Mandelson overrode security concerns—[Interruption.] No, Mr Speaker, let me be very clear: if I had been told that Peter Mandelson, or anybody else, had failed or not been given clearance on security vetting, I would not have appointed them. A deliberate decision was taken to withhold that material from me. This was not a lack of asking; this was not an oversight—[Interruption.] It was a decision taken not to share that information on repeated occasions.