The integrity of the UK government’s appointment process has been called into question – again – following revelations that No 10 twice rejected offers from its own ethics chief to vet Lord Mandelson for the post of British Ambassador to Washington.
As of Friday, 20 March 2026, the fallout from this decision continues to reverberate through Westminster, highlighting a significant disconnect between the Prime Minister’s pledge of leading an ethical government, guided by his own moral compass, in contrast to the Boris Johnson and Liz Truss administrations.
The rejection of official oversight will raise further questions about the role of the Prime Minister in appointing Lord Mandelson, suggesting that the warning signs regarding his past associations were not merely overlooked, but actively bypassed by the highest levels of the administration.
Darren Tierney, then head of the Cabinet Office’s propriety and ethics team, reached out to senior No 10 staff in 2024, on two separate occasions to offer a formal review of Mandelson’s suitability for the role.
These offers were declined, effectively shielding the appointment from the very scrutiny designed to protect the government from serious reputational damage. This evasion is particularly striking given that the Cabinet Office had already flagged significant concerns as revealed by the Mandelson Files published earlier this month.
These internal reports had explicitly warned of the “reputational risk” associated with Mandelson’s links to the convicted sex offender Jeffrey Epstein, including reports that Mandelson had stayed at Epstein’s properties while the financier was incarcerated.
The decision-making process within No 10 appears to have been driven by a narrow circle of Keir Starmer’s closest aides rather than established diplomatic or civil service channels.
Reports suggest that Morgan McSweeney, the then Chief of Staff, and Lord Matthew Doyle, the Director of Communications: both of whom maintained long-standing personal ties to Mandelson: were the primary architects of the appointment and dismissed concerns. The push to appoint the now disgraced former Labour grandee was criticised at the time by the Prime Minister’s National Security Adviser, Jonathan Powell, who described it as a “weirdly rushed” process.
It has been reported that Jonathan Powells reservations were shared by other officials in the Foreign Office who harboured deep reservations, yet the standard consultation with this department was allegedly bypassed entirely.
The result was a vetting process that felt less like a rigorous security check and more like a perfunctory exercise handled by personal associates.
Perhaps most concerning are the breaches of security protocol that occurred during this transition. It has emerged that Lord Mandelson was granted access to highly classified material before his formal security clearance had even been finalised.
These latest revelations will further damage Sir Keir’s reputation, which has been rocked by the scandal since it erupted last year, with Peter Mandelson forced to resign as US Ambassador, leave the House of Lords and arrested over allegations of Misconduct in Public Office.
Despite Sir Keir being forced to admit that the appointment had been a “mistake,” and repeatedly offering a public apology to Jeffrey Epstein’s victims, the scandal shows no signs of dying down, and with further documents relating to Peter Mandelson’s appointment still to be published and the conclusion of the police investigation to come, it is a bruise that opposition parties are keen to hit.
Ultimately, the Mandelson affair serves as a cautionary tale for British politics. It underscores the vital importance of independent oversight and the dangers of a “sofa government” or a chumocracy (the appointment of people because they are friends).
For a government that campaigned on a platform of restoring integrity to public life, the systematic sidelining of its own ethics chief suggests that it has done huge damage to the PM’s personal standings in the polls and that little has changed in the corridors of Whitehall.