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The emerging account of Peter Mandelson’s appointment as US ambassador raises a question not of process, but of judgment (Revealed: Mandelson failed vetting but Foreign Office overruled decision, 16 April). The prime minister was warned repeatedly. Briefings in November and December 2024 flagged reputational risks, including well-documented associations and potential exposure if the appointment went wrong. Keir Starmer’s national security adviser raised concerns directly. Yet the appointment proceeded at pace.

Security vetting did not introduce uncertainty; it confirmed it. Developed vetting, even when expedited, typically requires several weeks. Factoring in the Christmas slowdown, the effective assessment window was little more than a fortnight. A refusal reached on that timescale is unlikely to reflect marginal doubt; it suggests concerns identified early and clearly. Yet by 6 January, Mandelson was already operating with a security pass marked for developed vetting access. The system was behaving as if clearance were assured before the decision had been taken.

We are now asked to believe that the subsequent override of a negative vetting recommendation occurred without ministerial awareness. That is difficult to reconcile with the structure of the government, particularly given that vetting sits within the Cabinet Office. The September 2025 press claims alone should have triggered verification.

The more coherent explanation is simpler. The prime minister chose his candidate despite warnings. The system adapted to deliver that decision. When formal vetting contradicted it, the signal was contained rather than escalated. This was not an unforeseeable failure. It was the predictable consequence of a choice – a choice made by the prime minister himself.
Hannah Walker
Wymondham, Leicestershire

• Very well done to the Guardian for unearthing the fact that Peter Mandelson was appointed ambassador to the US despite having failed vetting. It’s no surprise that the government’s response to the revelation has been to sack the most senior civil servant involved, while insisting that all political figures are as pure as driven snow. However, when scandal is in the air, it’s often the cover-up that makes matters much worse.

Lord Mandelson had a long and chequered record in previous Labour governments and resigned from ministerial office not once but twice. So you would have expected David Lammy, the foreign secretary at the time, and Keir Starmer to have taken a keen interest in every aspect of his appointment – not the specifics, but certainly regarding any hurdles encountered. Apparently not, and that’s a huge failure on their parts.

At a time when the world is in turmoil, we appear to be stuck with a prime minister who has poor judgment, who is prone to U-turning and who fails to inspire confidence. I’d suggest he resign if it wasn’t for the fact that none of his possible replacements inspire confidence.
Doug Maughan
Dunblane, Stirling

• As a former Foreign Office civil servant (admittedly 65 years ago), I would identify the key point here to be the political decision to announce an ambassadorial appointment before vetting commences. No 10 was premature in doing that, the Foreign Office had a massive problem, and intermediaries made wrong decisions – errors of judgment on all sides, but none of them surely meriting a hysterical witch-hunt at a time of international crisis.
Veronica Baker-Smith
Pangbourne, Berkshire

• There’s one question that the prime minister needs to answer above all others (The key questions Keir Starmer must answer over Mandelson appointment, 20 April): “How could you have been so naive as to think that a man with Peter Mandelson’s record in public life could be trusted with any position of responsibility?”
Tony Green
Ipswich

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