Reporting by respected journalist David Maddox seven months ago has resurfaced at the centre of a growing political storm, directly challenging claims by Keir Starmer that he only learned this week of security concerns surrounding Peter Mandelson.
On 12 September 2025, Maddox, political editor of The Independent, reported that serious concerns had been raised within the security services about Mandelson’s suitability as UK ambassador to the United States.
Maddox has since confirmed he put those concerns directly to Downing Street at the time, describing suggestions that No 10 only became aware this week as “complete nonsense”.
The September warnings
Maddox’s report stated that Mandelson had not cleared MI6 vetting, according to sources. The concerns focused on his business links to China and his past association with Jeffrey Epstein. Despite this, Starmer was alleged to have pushed through the appointment.
When challenged in September, Downing Street responded that vetting had been conducted “in the normal way” by the Foreign, Commonwealth and Development Office (FCDO), while denying direct involvement.
The reporting prompted immediate political concern, with critics arguing that overriding security advice in such a sensitive diplomatic appointment would be highly unusual and would require explanation.
What ministers are normally told
The September report also highlighted how security concerns are typically handled. Senior diplomatic appointments involve input from intelligence agencies such as MI6 and are normally briefed to both the foreign secretary and the prime minister.
Former foreign secretary James Cleverly said at the time that any such concerns would ordinarily be communicated clearly to ministers, including the prime minister.
That established process is now difficult to reconcile with Downing Street’s current account.
Starmer’s defence under pressure
Speaking earlier today (17 April 2026), Starmer said it was “unforgivable” that he had not been told Mandelson failed security vetting.
He said neither he nor any minister had been informed, that he only became aware of the issue days ago, and that responsibility lay with officials inside the Foreign Office.
He has since dismissed senior civil servant Olly Robbins and promised to set out the full facts to Parliament.
However, his account has been questioned by political figures across parties as well as some Labour MPs, who say it is difficult to reconcile with established processes and earlier reporting.
A widening contradiction
The controversy centres on a clear tension between two accounts.
Reporting in September 2025 indicated that security concerns existed and were serious enough to be raised at senior levels, and that Downing Street had been directly questioned about them.
By contrast, statements from Downing Street in April 2026 assert that the prime minister was not informed and that no ministers were aware of any vetting failure.
Critics argue that, given the normal flow of intelligence briefings, it would be highly unusual for such concerns not to reach senior political leadership.
The existence of contemporaneous reporting, and Maddox’s assertion that Downing Street was approached at the time, has intensified those doubts.
Political fallout
The issue has triggered calls for greater transparency over the appointment process, along with renewed questions about ministerial oversight.
Opposition figures have demanded the release of all documentation relating to Mandelson’s appointment, while some Labour MPs have described the explanation as “not credible”.
The controversy also comes amid a series of high-profile resignations and dismissals, adding to broader scrutiny of decision-making within the government.
The unresolved question
Maddox’s September 2025 news report has become a key reference point in assessing the current dispute. It documented concerns about Mandelson’s vetting months before his eventual removal and indicates those concerns were already being raised with Downing Street.
As Starmer prepares to address Parliament, the central question remains unresolved: whether the failure lies in communication within government departments, or in political decision-making at the highest level.
