Prime Minister Keir Starmer will deliver a high-stakes statement to MPs on Monday as he seeks to contain a growing scandal over the appointment of Peter Mandelson as UK ambassador to Washington. The controversy, which has already led to the sacking of Foreign Office permanent secretary Olly Robbins, threatens to destabilise Starmer's leadership.
The scandal erupted after it emerged that the Foreign Office overruled a decision to fail Mandelson's security vetting without informing ministers. Starmer has said he was kept in the dark about the vetting failure and described the lack of disclosure as 'unforgivable'. He told the Daily Mirror: 'The fact that I wasn't told that Peter Mandelson had failed his security vetting when he was appointed is astonishing.'
Opposition leaders have called for Starmer to resign, arguing he would not have proceeded with the appointment had he known the full facts. Senior government figures fear this week could be make-or-break for the prime minister, despite his handling of the Iran crisis providing some respite. One insider said: 'All roads lead back to the original sin: Keir's decision to appoint Peter Mandelson to Washington even though everybody knew it was high risk.'
Downing Street has sought to rebut claims from Robbins's allies that he was legally prevented from informing ministers about the vetting decision. An explanatory document released by No 10 stated: 'No law stops civil servants sensibly flagging UK security vetting recommendations... to allow ministers to make judgments on appointments or on explaining matters to parliament.'
Robbins, who is expected to appear before the foreign affairs select committee on Tuesday, is understood to be taking legal advice after his dismissal. He is said to feel angry at what he perceives as unfair treatment and is determined to present his side of the story.
Deputy Prime Minister David Lammy urged party unity, warning that a leadership contest would be disastrous. 'In the middle of 2026, with a serious global crisis affecting prices and affordability, the idea of jettisoning one leader because of a bad set of local results... is just pie in the sky,' he told the Guardian.
