Lord Mandelson: Response to Humble Address

Debate between Emily Thornberry and Nick Thomas-Symonds

Wednesday 3rd June 2026 Commons Chamber

[Nick Thomas-Symonds]

On Palantir, I refer my hon. Friend to the methodology statement at the start of each of the three volumes, where it is made absolutely clear that there is a recognition that Palantir is a matter of interest to the House; indeed, there are references to Palantir within the documents. As I am sure the House will understand, I will not speculate on the contents of the documents that remain with the Metropolitan police, but certainly I invite everyone to look at the references to Palantir in the tranche of documents before the House—indeed, the public can do so as well.

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

I am interested in the mitigations, which are the reason we have this great gap between what would seem to be a security threat and Peter Mandelson being appointed. I cannot find any documents about that, but I have found that in written evidence to the Foreign Affairs Committee in September 2025—after the appointment, and when it was about to be withdrawn—Ian Collard said that he had requested a copy of the vetting summary. He made some notes based on the summary as an aide-mémoire, in case it was needed, and submitted them for the Humble Address. I am interested in seeing what the notes are of the mitigations: the man responsible for the mitigations took a note—presumably of what he had seen—and put it in for the Humble Address, yet it is not in the papers.

[Nick Thomas-Symonds]

I am grateful to my right hon. Friend. Officials leading the process will have heard the exchange—and this exchange—in relation to that specific point about Ian Collard. As the Chief Secretary to the Prime Minister set out in his statement on Monday, the documents with the Metropolitan police fall into several categories: internal correspondence relating to Peter Mandelson, and documents in relation to conflict of interest and national security vetting. I appreciate the point that my right hon. Friend makes and officials will have heard the exchange between her and me.

[Emily Thornberry]

I want to make it clear that the document I referred to is not part of the original decision making; it is an aide-mémoire that Ian Collard made. If I cannot see the original documents, can I at least see that later one?

[Nick Thomas-Symonds]

As ever, my right hon. Friend makes her case forcefully. I am treading carefully in my language because this process has been led by officials working with the ISC. The officials working on it will have heard the request that she just made.

--- Later in debate ---

[Nick Thomas-Symonds]

To the right hon. Gentleman’s direct question, I have not been part of the process or been given precise dates for when the Metropolitan police said what. However, I will say this: the documents with the Metropolitan police have been viewed by the chair of the Public Administration and Constitutional Affairs Committee, the hon. Member for North Dorset (Simon Hoare), so within the confines of not wishing to undermine the ongoing investigation we have tried to be as transparent as we can be with Parliament at this stage. In addition, the summary document of the vetting has been shared with the Intelligence and Security Committee, so to the extent that we have been able to share documents, we have. The request in this debate from the Chair of the Foreign Affairs Committee, my right hon. Friend the Member for Islington South and Finsbury, will no doubt have been heard as well.

Let me turn to the issue of redactions, which I started to develop in earlier answers to interventions. I will not repeat what the Chief Secretary to the Prime Minister said on Monday, nor the methodological note that is available for right hon. and hon. Members to look at, but I want to clarify some issues so that there is no doubt about the process that was followed. As I have said, no material was redacted on grounds of prejudice to national security or international relations without the ISC’s approval. The redactions agreed with the ISC are all triple-asterisked throughout the publication. When you see the three asterisks, that material was agreed with the ISC to be redacted.

On my point about precedent in the earlier exchange with the right hon. Member for New Forest East, the redactions were limited to the names of junior officials, contact details such as telephone numbers and email addresses, the personal or commercially sensitive data of third parties not relevant to the motion, and some cases where there was legal professional privilege. That is in line with the process that has been followed by successive Administrations in relation to Humble Address motions. Those redactions are clearly labelled in the publication. To reconfirm, no Government Minister or special adviser has determined any of the redactions; that was done by the official-led process. I echo the comments made by the Chief Secretary to the Prime Minister on Monday in thanking the Chair of the PACAC, the hon. Member for North Dorset, who is not in his place, for reviewing our approach to the third-party redactions and the material withheld, so as not to prejudice the ongoing police investigations and to ensure that we are being transparent with Parliament, as we should be.

Let me turn to the specific point about the Metropolitan police. Everyone across the House will appreciate the need not to prejudice the investigation, and will understand that I am unable to answer questions about certain documents that have been withheld. They include questions to Peter Mandelson by the Prime Minister’s then chief of staff and Peter Mandelson’s responses. The remaining documents, as I said a moment or two ago, fall broadly into the following categories: national security vetting material, conflict of interest process material and relevant internal correspondence with Peter Mandelson. Such information will be published in due course, either at the conclusion of the investigation, or at a point, if there were one, at which publication would no longer be prejudicial to the police investigation.

On 4 February, the House made its will clear.

[Emily Thornberry]

It may be that I am just lacking in imagination, but I do not understand why the police would not allow us to see the letter from the Foreign Office to Peter Mandelson saying, “You are given this job subject to not having anything to do with x, y and z”, or whatever the mitigations were. At the moment, we just do not have anything at all and so it is very difficult to understand why he was appointed. We are told that we need to wait for some time in the future—there is no date by which that will be disclosed—and at that stage all will become clear. It is as if the central point of the investigation and all these thousands of pages do not amount to anything until the police eventually decide to give us those crucial documents.

[Nick Thomas-Symonds]

It is, quite rightly, for the police and not for Ministers to determine the way in which they want their investigation to proceed and to identify documents that they feel are reasonable lines of inquiry. However, to give the House reassurance, even that class of documents was viewed by the Chair of PACAC—obviously, under particular controlled circumstances —because we wanted for Parliament the level of transparency that we could provide at that stage, despite the ongoing investigation.

The Government have discharged their duty to the House in complying with the Humble Address motion, aside from that small amount of information that will be subsequently published in a final tranche. As Members will have seen, Monday’s publication complies with the spirit and the letter of the motion, as well as being one of the largest ever publications laid in this House. Members have had some time to consider the document—certainly, since Monday—and I am grateful to the Leader of the House for making further time to debate the issue today. I know that throughout the course of the debate, Members will be conscious of not prejudicing the ongoing criminal investigation. I am grateful to the House for understanding the position the Government have taken and my position on answering questions on that.

I look forward to the debate before the House. The Chief Secretary to the Prime Minister will close and respond to points made during the debate. I commend the motion to the—