Sensemaker The Mandelson files: How much did Starmer know?
Mar 16, 2026
Rachel Sylvester, political editor at The Observer, provides brisk analysis of the Mandelson files and UK decision-making. She outlines what the released documents show about reputational risks and vetting gaps. She examines why Starmer approved the appointment, the political fallout, gendered dynamics in decision-making, and what further documents might reveal.
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Renewed Evidence Showed Relationship Continued After 2008 Conviction
- Peter Mandelson's friendship with Jeffrey Epstein resurfaced in 2025 after US court documents and emails showed their relationship continued after Epstein's 2008 conviction.
- That revelation triggered Mandelson's dismissal as ambassador, his resignation from Labour and the Lords, and a Metropolitan Police investigation.
Preappointment Warnings Highlighted Reputational Risk
- Downing Street received a due diligence memo on 11 December 2024 flagging a 2019 JP Morgan report that described Epstein as having a particularly close relationship with Mandelson.
- Jonathan Powell warned the appointment was being rushed and highlighted Mandelson's past forced resignations tied to business and financial dealings.
Mandelson Chosen For Media Savvy Rather Than Clean Record
- The government apparently wanted a politically savvy, media-hardened figure in Washington who could handle President Donald Trump, and Mandelson's charm and ability to 'work a room' made him attractive.
- Rachel Sylvester says Starmer, a cautious lawyer, misjudged that gamble when Mandelson's flaws surfaced.