The UK government publishes a second batch of documents, totalling nearly 1,500 pages, relating to Peter Mandelson’s appointment as ambassador to the United States and his activities in the role. Multiple outlets report the release is part of a broader response to a motion in the House of Commons and is described by ministers as among the most extensive document disclosures carried out in response to parliamentary demand.

The new tranche is expected to include material such as appointment-related paperwork and communications connected to Mandelson’s time in post, with separate reporting also highlighting the release of WhatsApp messages involving ministers. At the same time, several sources say the disclosures do not include certain items that are still withheld, including papers that would typically cover vetting or related declarations. The government states some documents are held back at the request of the Metropolitan Police because publishing them could potentially prejudice an ongoing investigation. Officials indicate these withheld materials are due to be released in a later tranche once the investigation concludes or when the documents are no longer considered prejudicial.