The second tranche of documents relating to Sir Keir Starmer’s decision to give the prestigious Washington job to Lord Mandelson rather than a career diplomat were released by the Government, with thousands of private WhatsApp messages now made public
Lord Peter Mandelson told the Government it would “never regret” naming him as Britain’s ambassador to the US, according to a memo released among thousands of documents concerning the appointment.
The second batch of files relating to Sir Keir Starmer’s decision to hand the coveted Washington role to Lord Mandelson instead of a career diplomat was made public by the Government on Monday afternoon.
Lord Mandelson also seemingly “declined to comply” with a request to surrender his personal phone and permit the Government to release WhatsApp messages and other material connected to his appointment, the documents revealed.
Before their release, the Prime Minister’s official spokesman characterised the extensive Whitehall-wide push to publish the documents as an “unprecedented piece of Government transparency”.
Ministers were preparing for potentially embarrassing disclosures ahead of the files being made public, which contain thousands of previously private WhatsApp exchanges between senior Government figures.
The memo, dated November 18 2024, seems to have been drafted while Lord Mandelson was awaiting the outcome of a ballot to determine Oxford University’s next chancellor, a position for which he was reportedly among the leading candidates at that time.
The letter, composed in blue ink on headed notepaper bearing Lord Mandelson’s name and a House of Lords seal, stated: “Dear David, As today (and all week) is polling day in Oxford and I am returning to London, I wanted to drop you a line, personally, about Washington.
“Thankfully, the media speculation has gone away and I hope this was not too irritating to you. I just wanted you to know that if you were minded to appoint me I would make sure you never regret it.”
Steering Britain’s affairs “through the Trump administration will require super-human skills and luck and a massive team effort”, he noted, before adding: “For me it would be the last thing I do in public life and it would be a huge honour to serve you and the Government in this role. So if you are up for it, so am I.”
The disclosure revealed that Lord Mandelson had exchanged WhatsApp messages with a number of senior government ministers.
On 20 July 2025, he informed pensions minister Torsten Bell that “the government doesn’t do policy, generally speaking, well enough”.
Mr Bell responded: “That is definitely true – everyone seems to think it’s someone else’s job to get the policy right… Which is very odd.”
Lord Mandelson fired back: “As the saying goes, rubbish in rubbish out…”
Separately, he described former transport secretary Louise Haigh’s departure from government as “harsh” following her resignation over a fraud offence. In a communication addressed to her on 29 November 2024, he wrote: “Lou, I am very sorry about this. You have been brave and loyal in your decision but it seems harsh given you were appointed in full knowledge.
“But you have acted in a way that enables you to come back later and everything you say and do now should be done with that in mind. Strong and honourable.”

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