More Mandelson Papers To Be Published Before Christmas — Some Still Held By Police

More documents on Lord Mandelson's appointment as Britain's ambassador to the United States are to be published before Christmas, the Cabinet Office has told Parliament — with some papers still withheld because they form part of a Metropolitan Police investigation.

Releases have already come in batches, published in March and June. Others were held back as material in the police investigation. Cabinet Office permanent secretary Cat Little, writing to the chair of Parliament's Intelligence and Security Committee, said some of those documents could "now be published without prejudicing their investigation," and that the Cabinet Office is "now beginning the process to prepare these documents so that they may be laid before the House… as soon as possible."

The timetable points to publication before Parliament rises for the Christmas recess on December 17. Some documents will still be withheld at the Met's request — the letter establishes that the police hold on the record is partial, not total, and that the boundary of what stays secret is set by the investigation, not the government.

The Background, On The Record

Mandelson became ambassador in February 2025 and was sacked in September of that year after new information emerged about the extent of his relationship with Jeffrey Epstein. He was arrested on February 23 on suspicion of misconduct in public office, over allegations that he passed market-sensitive government information to Epstein while a minister. Mandelson has denied criminal wrongdoing in earlier reporting; no new statement from him accompanied Thursday's development.

The documents at issue concern the appointment itself — what was known, by whom, and when, inside the process that sent him to Washington. Two batches have already been laid before the House; the third is now in preparation, and the fact that the police have released their hold on part of it is itself a development in the parallel criminal matter: investigations do not usually loosen their grip on documents they still need.

What lands before December 17 will be read in both directions — by those looking for what the vetting missed, and by those watching what the Met still considers too sensitive to release. The empty spaces in the third batch may end up as informative as its pages.

The committee route matters. The letter was written not to a newspaper but to the chair of the Intelligence and Security Committee — the body whose remit covers exactly the territory the appointment touched: a diplomat with intelligence-community exposure, a vetting process, and a foreign-relationship scandal. Laying the documents before the House, rather than releasing them to the press, puts them into the parliamentary record, where they can be cited in debate and where their redactions can be challenged by members.

The December 17 date is Parliament's own deadline: the Christmas recess. A release before the House rises can be questioned in the chamber; one slipped out during the recess cannot, until January. The Cabinet Office's formulation — preparation begun, publication "as soon as possible" — commits it to the earlier of those two paths in everything but ink. Between now and then, the Met's remaining hold defines the boundary of the public record: what the police still need stays dark, and everything else joins the March and June batches in the light.

Sources: BBC (Cabinet Office letter, release timetable, background); earlier BBC reporting (arrest, sacking, denial).