Lord Mandelson: Response to Humble Address

Ian Byrne Excerpts

Wednesday 3rd June 2026 Commons Chamber

[Ian Byrne (Liverpool West Derby) (Lab)]

The latest Peter Mandelson scandal epitomises everything that my constituents in Liverpool West Derby detest about the political establishment and why so many are losing faith in this place. Here was a man who brought Government into disrepute on multiple occasions—a man who repeatedly placed personal interest and profit ahead of public service—yet instead of being consigned to political history, he was rehabilitated by senior figures in my own party and elevated through a position of extraordinary, unelected influence. Why? Because his value to the political establishment was never rooted in principle or public service; it was rooted in his history of brutal, factional manoeuvring, his network of powerful contacts and his ability to pull strings behind the scenes. Even his association with one of the world’s most notorious paedophiles was seemingly outweighed by the usefulness of those connections and—shamefully, for those responsible for his appointment—with no apparent regard for the victims of Jeffrey Epstein. I thank my hon. Friend the Member for Pontypridd (Alex Davies-Jones) for her speech, which outlined that so powerfully.

Though the latest documents reveal moments of embarrassing sycophancy, they tell us little that we did not already know. Mandelson’s fingerprints are all over this Government. His involvement stretched from Ministers and advisers to the very centre of power. Just yesterday evening, we learned that the Chancellor asked Mandelson to visit her at the Treasury to advise on trade matters while he was chair of the private lobbying firm Global Counsel. No record of the meeting was disclosed.

Mandelson’s influence, exercised through figures such as the Prime Minister’s former chief of staff Morgan McSweeney, was vast, unaccountable and entirely undemocratic. Based on the great lengths that McSweeney and others went to ensure that Mandelson was given the job as US ambassador, including by applying pressure on civil servants, it is very reasonable to conclude that Mandelson’s influential position was reward for his support of the Labour Together faction. The damage that organisation has done to my party and this Government cannot be ignored, so I once again reiterate my call to the Chief Secretary to the Prime Minister for a full, transparent and independent inquiry into Labour Together and all those involved in the organisation.

The question many of my constituents are asking is: how could an unelected figure, whose public record is so controversial, wield such influence over the decisions of Government while facing so little scrutiny or accountability? That lack of accountability also helps to explain why the latest disclosures were not far more uncomfortable for Mandelson and those around him. As we know, despite requests to do so, he refused to hand over his personal phone as part of the evidence-gathering process. That speaks to a wider problem of culture in Westminster and Whitehall, and is exactly why we need a duty of candour that a Hillsborough law would introduce. There can be no more exemptions from transparency for the powerful; there can be no special rules for those at the top. Public confidence depends on accountability applied equally to everyone.

I, like many others, await Government actions on the progress of that crucial piece of legislation, and I hope that the Chief Secretary to the Prime Minister can shed some light on its stalled progress when he winds up the debate. The ongoing police investigation means that Mandelson may yet face further scrutiny. However, the absence of so much correspondence, together with the significant redactions in material already published, means the true extent of his influence over Government decision making may never be fully known.

My particular concern centres on the relationship between this Government and the US technology firm Palantir, a former client of Global Counsel. The documents reveal that Mandelson arranged meetings with Palantir’s founder Peter Thiel—historically a supporter of Donald Trump—and Louis Mosley, the company’s UK head. Those meetings followed the Prime Minister’s visit to Palantir’s Washington headquarters in February—a meeting reportedly brokered by Mandelson, for which no official minutes or transcript were produced.

Following this, later in the year, in September, during the state visit of Donald Trump, there was a pledge by Palantir to expand its work with the Ministry of Defence to a value of £750 million over five years. I and many others in this place and beyond do not believe a company associated with military operations in Gaza and the facilitation of aggressive immigration enforcement in the United States should be entrusted with expanding influence over any public services in this country.

My greatest concern is Palantir’s growing role within our national health service—a matter that the Science, Innovation and Technology Committee today described as

“an unacceptable point of weakness”,

which could leave our data “at the mercy” of hostile actors. I first raised concerns about this company in 2023 when the federated data platform contract was awarded. Since then, I have repeatedly called on the current and the last Governments to exercise the 2027 break clause and end this relationship. Yet despite widespread concerns from parliamentarians, healthcare professionals and members of the public, for some reason Palantir’s presence within our NHS and access to patient data has only continued to grow.

That expansion comes despite significant concerns being raised elsewhere. NYC Health + Hospitals withdrew from its contract with Palantir earlier this year, while a proposed Metropolitan police contract was blocked last month. Those decisions reflected principled leadership and a recognition that public trust must come before corporate influence, and I thank Mayor Khan for showing that desperately needed leadership, which is a real example to others. The concerns that were acted on are shared by many NHS staff and many of my constituents, who are deeply uneasy about the growing role of Palantir in managing sensitive personal data. That is why I was particularly concerned when the former Health Secretary, my right hon. Friend the Member for Ilford North (Wes Streeting), ruled out ending Palantir’s contract earlier this year, citing efficiency gains, despite evidence that many NHS trusts using the platform had not reported clear benefits of the software.

For me, it is here that the missing documents become extremely significant. Just months after Mandelson sought a meeting with Palantir UK’s Louis Mosley, the former Health Secretary, who we know was in regular contact with Mandelson, held a private meeting with Mosley himself, as reported by The Guardian among others. A legitimate question arises: did Mandelson facilitate that meeting in the same way he appeared to broker discussions between Palantir and the Prime Minister?

While many in Westminster are preoccupied with the gossip, personal exchanges and political intrigue contained within these documents, I am far more concerned by what is absent: the gaps, the redactions, the missing correspondence that may never come to light because relevant material was withheld or “phones were stolen”. Those missing pieces would not simply demonstrate that Peter Mandelson was embedded within the machinery of government; they would reveal the consequences of that influence. They would show how decisions affecting our public services, our NHS and our democracy may have been shaped by unelected power, corporate interests and private relationships operating beyond public scrutiny. Until there is full transparency and genuine accountability for how decisions of national importance are made, public trust in this place will continue to erode, and that is a very dangerous place to be going.

That principle should have applied to Peter Mandelson, but it clearly did not, and what a catastrophic mistake that was and continues to be. Moving forward, it must also apply to all those currently exercising power within this Government and anybody seeking to lead this Government in the years ahead.