Starmer Denies Knowledge of Mandelson's Failed Security Vetting
Keir Starmer has asserted that he was never informed about Peter Mandelson's initial failure in the security vetting process for his appointment as US ambassador, a revelation that has ignited a major political controversy. The Guardian's disclosure that the Foreign Office overruled the vetting denial has led to mounting pressure on the Prime Minister, with calls for his resignation and a thorough investigation into the appointment procedures.
Timeline of the Mandelson Appointment Controversy
The saga began with Labour's landslide election victory on 4 July 2024, engineered by Morgan McSweeney, a protege of Mandelson. From July to December 2024, Mandelson courted ministers in the new government, exchanging friendly WhatsApp messages with Health Secretary Wes Streeting. Despite his past resignations and links to disgraced financier Jeffrey Epstein, Mandelson was appointed US ambassador on 20 December 2024, reportedly after McSweeney persuaded Starmer to choose him over former Tory chancellor George Osborne.
On 28 January 2025, Mandelson was denied clearance by UK Security Vetting (UKSV), a rare occurrence. However, just two days later, on 30 January 2025, the Foreign Office overruled this decision, confirming his security clearance, with suspicions pointing to then-permanent secretary Olly Robbins. The controversy deepened on 2 September 2025 when the first batch of Epstein files revealed Mandelson's close relationship with the sex offender, including emails where he described Epstein as "my best pal" and urged him to "fight for early release" in 2008.
Political Fallout and Defences
Starmer initially defended Mandelson in the Commons on 10 September 2025, expressing "full confidence" in him, but reversed course a day later, firing him on 11 September 2025 after the Epstein revelations showed the relationship was "materially different" from what was known. Throughout this period, officials maintained that vetting was conducted "in the normal way," with Foreign Secretary Yvette Cooper and Robbins asserting in a joint letter on 16 September 2025 that it met "usual standards."
Robbins later told a select committee on 3 November 2025 that the "prime minister wanted to make this appointment himself," hinting at political pressure. Further Epstein files released on 30 January 2026 implicated Mandelson in passing market-sensitive information and urging threats over banker bonuses, leading Starmer to claim on 5 February 2026 that vetting had cleared Mandelson, while acknowledging the need for review.
Resignations and Revelations
Morgan McSweeney resigned as Starmer's chief of staff on 8 February 2026, taking responsibility for advising the appointment and calling for an overhaul of vetting processes. Documents released on 11 March 2026 revealed that Mandelson was offered a £75,000 severance payment and that national security adviser Jonathan Powell had doubts, describing the appointment as "weirdly rushed." The Guardian's revelation on 16 April 2026 that Mandelson failed vetting and it was overruled prompted No 10 to plead ignorance, leading to Robbins' forced exit.
Starmer expressed fury on 17 April 2026, calling the situation "staggering" and "unforgivable," and announced a review by retired high court judge Adrian Fulford into the vetting system. This scandal has raised serious questions about transparency and national security protocols within the government.
