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Sir Keir Starmer’s former chief of staff, Morgan McSweeney, is under scrutiny for allegedly using a personal email account to liaise with Peter Mandelson prior to his controversial appointment as US ambassador. This revelation has ignited fresh allegations of a cover-up within Labour, particularly following the government’s release of limited documents related to Mandelson’s role, which includes only 31 messages and documents. Critics argue that this lack of transparency raises serious questions about the appointment process.
Allegations of a Cover-Up Grow
The revelations emerged after the first set of documents concerning Lord Mandelson’s US ambassadorship was made public. These files, however, notably excluded any correspondence from McSweeney, who played a pivotal role in the appointment decision. Sources indicate that McSweeney communicated with Mandelson using personal emails and WhatsApp, but no messages from these exchanges have yet been disclosed.
Shadow Chancellor of the Duchy of Lancaster, Alex Burghart, expressed his discontent, stating, “The stench of a cover-up over the Mandelson files is overwhelming. After weeks of delay, Labour has finally begun releasing some documents, but crucial information remains conspicuously absent, including communications from the Prime Minister and his advisors.” Burghart has insisted on full transparency, demanding that all relevant communications, including those on private devices, be made available.
Downing Street Defends Appointment Process
In response to the growing outcry, Downing Street has maintained that there was no formal requirement for the Prime Minister to interview Mandelson before his appointment. A spokesperson reiterated that due diligence was adhered to, despite mounting criticism regarding the rushed nature of the vetting process. The spokesperson stated, “The Prime Minister did read the advice, but clearly there are lessons to be learned on the wider appointment processes.”

Tory leader Kemi Badenoch has also weighed in, claiming that significant information appears to be missing from the released files, including a blank response box that should have contained the Prime Minister’s comments regarding advice received in 2024 about Mandelson’s appointment. Despite these assertions, Downing Street has countered by insisting that no notes were redacted and that the procedures followed were adequate.
Security Concerns and Lack of Clarity
The situation has been complicated by concerns raised within government about Lord Mandelson’s appointment. National security adviser Jonathan Powell previously noted that the decision felt “weirdly rushed,” prompting questions about the thoroughness of the vetting process. This has led to speculation about whether Prime Minister Starmer misled Parliament when he claimed that “full due process” was observed during Mandelson’s appointment.
In light of these controversies, Badenoch has called for an investigation by the Prime Minister’s independent ethics adviser, Sir Laurie Magnus, regarding potential breaches of the ministerial code. However, Magnus has reportedly found no basis for such an inquiry, further fuelling the debate over accountability and transparency within the government.
Why it Matters
This unfolding saga has significant implications for Labour and its leadership, casting a shadow over Starmer’s judgment and integrity during a critical juncture. The allegations of a cover-up not only threaten to undermine public trust in Labour’s governance but also raise broader questions about the ethical standards expected from those in power. As calls for accountability grow louder, the party’s ability to navigate this controversy could have lasting effects on its reputation and electoral prospects.
