The UK government is preparing for a politically awkward week as it releases thousands of pages of documents related to Peter Mandelson’s appointment as ambassador to Washington, including his private WhatsApp messages and texts.
Described as one of the largest government publications ever presented to Parliament—second only to the Chilcot Inquiry into the Iraq War—the release will span three volumes, with over 160 pages consisting of Lord Mandelson’s private communications. The documents are expected to be published on the government website at around 14:30, followed by a statement in Parliament from Chief Secretary to the Treasury Darren Jones.
The Prime Minister’s official spokesman confirmed that every government department contributed to compiling the documents, calling it "the largest ever response" to a humble address. Officials spent thousands of hours gathering the material, and redactions will be made on national security grounds, particularly regarding military and intelligence matters related to the UK-US relationship.
Privately, ministers are bracing for the release of exchanges they assumed would remain confidential. Words like "excruciating," "sycophantic," and "cringeworthy" are being used to describe some of the messages, which reveal the highly personal nature of WhatsApp conversations. Many messages reportedly show Cabinet ministers lavishing praise on Mandelson after his sacking, which could create awkward comparisons with their later public statements. There are also concerns about criticisms of the Prime Minister that may surface.
The vetting file compiled before Mandelson’s appointment is not expected to be included. However, reports indicate that his associations with figures in China, Russia, and Israel raised concerns. Former Foreign Office head Sir Olly Robbins told MPs that he granted security clearance after putting mitigations in place. Lord Mandelson has denied any security concerns and claims key details have been muddled. Separate concerns about commercial conflicts of interest linked to his consulting firm, Global Counsel, were addressed by having the deputy head of mission oversee dealings with relevant companies.
Regarding disappearing messages in WhatsApp chats, the Prime Minister’s spokesman said a review of corporate communication channels is underway.
From Downing Street’s perspective, today’s release may mark the peak of the controversy, but the situation is not entirely over. A police investigation into Lord Mandelson continues. He has repeatedly stated he believes he has not acted criminally, did not act for personal gain, and is cooperating with the authorities.