Mandelson Messages Reveal Concerns Over Starmer's Leadership

Documents released by the UK government have revealed private messages in which Lord Mandelson and senior ministers expressed concerns about Prime Minister Keir Starmer, Downing Street and Labour MPs.

Get today's headlines by email

The 1,500 pages of correspondence relate to Lord Mandelson’s appointment as the UK’s ambassador to the United States, a post he later lost because of his connections to convicted sex offender Jeffrey Epstein.

Among the messages, Lord Mandelson described No 10 as “beleaguered and bereft” and said it required a “complete revamp”. The exchanges also show discussions about Labour’s internal divisions, policy-making and Starmer’s authority during a major rebellion over welfare reforms.

Welfare Revolt Raises Leadership Fears

In June 2025, Lord Mandelson and then-Cabinet Office minister Pat McFadden discussed government plans to reduce welfare spending by £5 billion by 2030. The proposals faced strong opposition from Labour MPs and were later significantly weakened.

As tensions mounted ahead of a parliamentary vote, McFadden wrote that MPs were “not moving”. Mandelson responded that the government could lose the vote and added: “I am not sure that Keir survives that.”

McFadden replied that Starmer was meeting the rebellion’s leaders and warned that defeat, withdrawal of the bill or major concessions would damage the prime minister’s authority. Mandelson agreed with the assessment.

Criticism of No 10

The documents also reveal concerns about the operation of Downing Street.

In July 2025, Mandelson and McFadden discussed Morgan McSweeney, who was serving as Starmer’s chief of staff. Mandelson said McSweeney appeared to have little confidence in the prime minister’s ability to reform No 10 and believed the priority should be maintaining support within the Parliamentary Labour Party.

Mandelson later wrote that he was “slightly losing faith in all this”.

In another exchange, he asked McFadden for his assessment of Downing Street. McFadden replied that the situation was “not good” and suggested advisers lacked clear direction.

Mandelson criticised the operation further, arguing that staff were not functioning effectively as a team and lacked leadership. He said many officials were uncertain about Starmer’s priorities and direction, later describing No 10 as “beleaguered and bereft”.

Debate Over Labour Priorities

Another message from McFadden appeared to criticise Labour backbench MPs, saying discussions often focused on identifying new sources of tax revenue to fund benefits rather than addressing broader policy questions.

A spokesperson for McFadden said his public position has consistently been that government should focus on improving people’s lives through work and opportunity, particularly for younger people.

Conservative leader Kemi Badenoch seized on the disclosures, arguing they showed a gap between Labour’s private discussions and public statements.

Policy Concerns and Ambassador Appointment

The papers also contain messages between Mandelson and minister Torsten Bell discussing government policy development. Bell argued that too many people assumed policy-making was someone else’s responsibility, while Mandelson suggested weak policy inevitably led to poor outcomes.

The correspondence includes a handwritten note sent by Mandelson to then Foreign Secretary David Lammy in November 2024, before his appointment as ambassador. In it, Mandelson pledged that Lammy would not regret selecting him for the role.

The government published the documents after MPs voted earlier this year to require their release. Speaking in the House of Commons, Cabinet Office minister Darren Jones said the disclosure was among the largest government publications ever produced and had cost more than £1 million.

Join the discussion?

Already a member?

Adapted by ASEAN Now. Source 2 June 2026