Officials reportedly blocked the planned release of a secret memo in which Lord Mandelson urged then-prime minister Sir Tony Blair to meet financier Jeffrey Epstein, documents due to be opened under the UK’s 20-year rule show.

The note, believed to have been written in May 2002 when Peter Mandelson was a Labour backbencher, is said to have advised that a meeting with Epstein would be "safe" and useful given his network of business contacts. A civil service summary of the document was also due to be released but, according to news reports, both were pulled at the last minute by the National Archives.

News outlets said an exemption was applied on the grounds that disclosure could harm Britain’s international relations, particularly with the United States. It was not made public whether Sir Tony Blair ever met Epstein after aides were shown the message and passed it to the prime minister.

Lord Mandelson, now Britain’s ambassador in Washington, faces renewed scrutiny over his past ties to Epstein after the reports. His relationship with Epstein has been the subject of previous disclosures, including the release in the United States of a 2003 “birthday book” in which Mandelson described Epstein as his "best pal" and praised his "glorious homes." Mandelson has said he regrets the relationship, has called some of the exchanges "embarrassing," and has maintained that he never had business dealings with Epstein.

Labour leader Sir Keir Starmer defended Mandelson’s appointment as ambassador when questioned in Parliament, saying he retained "full confidence" in him and describing him as "playing an important role" in the UK–US relationship. Starmer declined to commit to publishing all of Mandelson’s correspondence with Epstein, saying such material is subject to an independent process.

The documents were due to be released under the National Archives’ 20-year rule, which makes many government papers public two decades after creation. The reported late decision to withhold the memo and the summary prompted questions about the reasons for invoking the exemption and whether similar material might remain closed.

Jeffrey Epstein was convicted in 2008 for soliciting an underage girl for prostitution and died in a US jail in 2019 while awaiting trial on federal sex-trafficking charges. Epstein’s associations with a number of high-profile figures have been examined in both the United Kingdom and the United States; former US president Donald Trump has also faced scrutiny over his past connection to Epstein.

Officials at the National Archives and the Cabinet Office did not immediately publish comment to the media reports. The reporting attributing the withheld material to officials stems from press coverage that said the exemption was applied because disclosure could damage international relations; the exact legal basis and the contents of the withheld civil service summary have not been made public.

Parliamentary and archival experts say the 20-year rule has long been a mechanism for public access to historical government records, but exemptions exist for material that could affect national security or international relationships. The apparent decision to invoke such an exemption in this case is likely to prompt further parliamentary questioning about the criteria used and whether additional material related to Epstein and contacts with UK political figures will be released.

It remains unclear whether any meeting between Epstein and Blair occurred after the memo was circulated. The former prime minister’s office has not confirmed meetings beyond standard engagement; aides at the time reportedly saw the note and passed it on. Investigations and media scrutiny of Epstein’s contacts have continued in the years since his initial 2008 conviction and subsequent arrest in 2019.