Peter Mandelson was asked to testify before the US Congress about his relationship with the disgraced financier Jeffrey Epstein.
Committee on Oversight and Government Reform Ranking Member Robert Garcia and Congressman Suhas Subramaniam requested that Mandelson be questioned as part of the investigation into Epstein.
The letter said: “While you no longer serve as the British Ambassador to the United States and have stepped down from the House of Lords, it is clear that you have extensive social and business links with Jeffrey Epstein and possess information critical to our investigation into Epstein’s activities.
“Given the appalling allegations of Epstein’s conduct, we request that you make yourself available for a transcribed interview with committee staff regarding the crimes of Jeffrey Epstein and his co-conspirators.”
In the letter, members pointed to instances in which Mandelson was photographed or mentioned in the 3.5m Epstein files released in the past fortnight.
The former UK ambassador to the US has been given until the end of the month to respond.
Mandelson is being investigated by the Metropolitan Police for misconduct in public office following allegations that he passed sensitive market information to Epstein in 2009 when he was business secretary in Gordon Brown’s government.
As part of the investigation, officers searched two properties belonging to the former member of the House of Lords. Mandelson has denied any criminal wrongdoing.
Garcia and Subramaniam made a similar request to testify for Andrew Mountbatten-Windsor last year. Andrew has consistently denied any wrongdoing.
The former prince failed to respond to an interview request from the committee in November, prompting Keir Starmer to urge anyone with “relevant information” to share it.
Mandelson resigned from the House of Lords and quit the Labor Party earlier this month.
The former cabinet minister was sacked as US ambassador in September over past ties to the disgraced financier.
