The UK government released roughly 1,500 pages of communications on Sunday covering Lord Mandelson’s appointment as the British ambassador to the United States, exposing private criticisms of Prime Minister Keir Starmer’s inner circle and Labour backbenchers. The documents, published following a parliamentary vote earlier this year, show Mandelson and senior ministers exchanging candid assessments of Downing Street’s operational weaknesses and policy challenges during the summer of 2025.
The document release fulfilled a legal obligation initiated after MPs voted to compel transparency around the ambassadorial nomination, a process that later ended in Mandelson’s dismissal due to his ties to convicted sex offender Jeffrey Epstein. Cabinet Office minister Darren Jones told Parliament that the publication represented one of the government’s largest document releases and cost the department more than £1 million to prepare.
In a series of messages exchanged in late July 2025, Mandelson offered a blunt assessment of the No 10 operation. He described the Downing Street staff as disjointed, stating they do not work as a cohesive team and lack clear leadership. Mandelson wrote that most aides do not know what the prime minister thinks or wants, characterizing the atmosphere as “beleaguered and bereft” and arguing it requires a “complete revamp” and an “infusion of purpose and confidence.”
A few weeks prior, Mandelson told minister Pat McFadden that senior staff appeared to have abandoned efforts to reform the prime minister’s office. Mandelson said former chief of staff Morgan McSweeney had recently indicated he lost faith in Starmer’s ability to reorganize No 10 and believed the leader should prioritize securing majority support within the Parliamentary Labour Party instead. McFadden responded that No 10 advisers were unclear about their own objectives.
The same exchanges touched on a major legislative battle in June 2025, when the government attempted to pass a welfare bill aimed at cutting £5 billion from the benefits budget by 2030. A significant rebellion by Labour backbenchers ultimately forced ministers to water down the proposals. During the buildup to the vote, McFadden wrote to Mandelson that MPs were entrenched in their positions. Mandelson replied that a government defeat threatened the prime minister’s political survival, writing, “I am not sure that Keir survives that.” McFadden agreed that a defeat, a bill withdrawal, or a gutted version would destroy Starmer’s authority.
McFadden, who served in the Cabinet Office at the time before moving to the Department for Work and Pensions, also expressed frustration with how Labour lawmakers approached social policy. “Every meeting I have is ‘who can we tax in order to pay benefits to others’,” McFadden wrote to Mandelson. “They’re asking the wrong questions.”
Conservative leader Kemi Badenoch seized on the comments immediately after the documents were published. “Pat McFadden has said in private what he and the prime minister deny in public,” Badenoch said. “As I’ve said repeatedly, Labour MPs don’t understand where money comes from. They think our taxes are their money to spend, rather than the result of the hard work of the people in our country who deserve so much better.”
A spokesperson for McFadden defended his record by pointing to his public statements as work and pensions secretary. The spokesperson said McFadden focuses on expanding work opportunities for young people and changing lives rather than writing off vulnerable populations, contrasting his department’s current approach with policies from the previous government.
The documents also include correspondence between Mandelson and Treasury minister Torsten Bell regarding government policy formulation. Mandelson told Bell that the government generally fails to do policy well, emphasizing that all legislative work must start with a clear policy foundation. Bell responded that officials operate under the assumption that policy development is someone else’s responsibility, to which Mandelson replied that poor inputs yield poor outputs.
Earlier correspondence from November 2024 shows Mandelson writing a handwritten note to then-Foreign Secretary David Lammy before his appointment. “If you were minded to appoint me I would make sure you never regret it,” Mandelson wrote. Starmer officially announced Mandelson’s selection on December 20, 2024, but the appointment faced sustained parliamentary and public pressure before Mandelson was eventually removed from the post.
The released files do not contain specifics regarding the vetting process or internal warnings about Mandelson’s connections to Epstein. BBC political editor Chris Mason noted that while public attention to the Mandelson saga shows signs of diminishing returns, the continued release of internal communications compounds existing pressures on Starmer’s leadership. The prime minister has already faced calls to resign after electoral setbacks last month, and internal maneuvering over his leadership persists within the Parliamentary Labour Party.