The Biggest Document Dump Since Chilcot — And the Most Important File Is Missing

The first batch of so-called Mandelson Files, released back in March, ran to 147 pages. This second release? Over 1,000 pages across three bound volumes. According to BBC News, this is the largest government document publication ever laid before Parliament outside the Chilcot Inquiry into the Iraq War — which itself was a 12-volume, 2.6 million-word exercise in official embarrassment.

More than 160 pages consist entirely of Lord Mandelson's text messages and WhatsApp exchanges. The bundle also includes a government explanation of just how much work it took to compile — described as thousands of hours of officials' time, according to BBC News.

Yet the document that matters most — the one that reportedly flagged concerns about Mandelson's ties to China, Russia, and Israel before he was ever appointed — is NOT being released.

Met Police: Stand Down on That File

The Cabinet Office is withholding the key vetting document on the advice of the Metropolitan Police, according to The Independent. The reason: releasing it could jeopardize an active criminal investigation.

That investigation is real. Earlier this year, the Metropolitan Police launched a criminal probe into alleged misconduct in public office, after allegations emerged that Mandelson passed sensitive government information to Jeffrey Epstein in 2009, while serving as Business Secretary under Prime Minister Gordon Brown.

The man Keir Starmer appointed as Britain's top diplomat in Washington was, at that moment, reportedly feeding confidential intel to a convicted sex offender who was simultaneously networking with billionaires and foreign governments. According to Wikipedia's documented summary of the Epstein files, Mandelson allegedly told Epstein he "thought the world of him" and advised him to "fight for early release" from his 18-month sentence for soliciting prostitution from a minor.

Parliament's Intelligence Watchdog Already Called Out the Government

This isn't a new fight. The Intelligence and Security Committee — Parliament's own intelligence watchdog — had already accused the government of withholding documents and applying redactions too broadly to material MPs requested through a Humble Address mechanism, according to The Independent.

A Humble Address is one of Parliament's oldest tools for forcing the government to hand over information. MPs used it here specifically because they didn't trust the government to volunteer what it knew.

Who Is Mandelson — And Why Did Starmer Pick Him?

Peter Mandelson isn't some random appointment. He's one of the architects of New Labour, a former EU Trade Commissioner, and a political operator with decades of high-level connections across governments, corporations, and — it turns out — convicted criminals.

Starmer and then-Foreign Secretary David Lammy announced Mandelson's appointment as UK Ambassador to Washington. Starmer backed the pick personally and publicly.

Then September 2025 arrived. The US House Oversight Committee released a cache of private emails between Mandelson and Epstein. The fallout was immediate. According to Wikipedia's documented record of the scandal, Mandelson had called Epstein his "best pal" in a 2003 birthday book entry, had his travel paid for by Epstein, and received payments from Epstein alongside his husband.

Starmer fired him. Mandelson resigned from the Labour Party and from the House of Lords.

The Core Issue

BBC News and The New York Times are framing this primarily as a story about government transparency and process — how officials handled the document release, the sheer volume of material, the administrative burden. Both outlets bury the criminal investigation angle.

The criminal investigation is the story. A sitting Prime Minister appointed a man to the most consequential diplomatic post in the British government — despite a vetting document that flagged serious national security concerns — and that vetting document is now evidence in a criminal investigation. If the vetting process was rigorous, why did the vetting document raise flags about connections to China, Russia, and Israel? And why is that document now evidence in a misconduct investigation?

The Cabinet Office line that a "rigorous process was followed" in Mandelson's appointment, as reported by The Independent citing official Olly Robbins, is doing a lot of heavy lifting right now.

What Happened

Your government appointed a man to represent you in Washington who had a years-long friendship with a convicted pedophile financier, allegedly shared your government's confidential information with that man, and whose vetting file was apparently alarming enough that it's now sitting in a Metropolitan Police evidence file.

The 1,000 pages being released will reveal how government actually works — the backchannels, the WhatsApps, the internal disagreements. But without the one document that shows what officials knew about Mandelson's background before they gave him the job, it's a picture with the most important piece missing.

Starmer made this call. He owns every page of it.