LONDON—British Prime Minister Keir Starmer is pressuring the U.K.’s former Ambassador to the U.S. Peter Mandelson to provide evidence to American authorities over Jeffrey Epstein, after a cache of emails appeared to show that Mandelson leaked confidential British government correspondence to the disgraced financier.

The emails also include banking transactions that appeared to show Epstein wired $75,000 to Mandelson, long an influential figure on the British left, years earlier.

Starmer ordered an urgent investigation into Mandelson on Monday after a trove of emails released by the Justice Department in recent days provided fresh details about the longstanding relationship between Epstein and the British politician, a relationship that continued well after Epstein was first charged with sex offenses.

Mandelson was removed as ambassador last year after earlier details of his dealings with Epstein came to light, and the latest revelations will add pressure on the politician. Starmer on Monday also demanded that Mandelson resign from the House of Lords, the U.K.’s upper chamber in Parliament.

Mandelson said in a statement on Sunday that he had no recollection or record of receiving the funds and that the payments “need investigating by me.” Mandelson quit the ruling Labour Party on Monday but he remains a member of the House of Lords. On Sunday, he said he wanted to repeat “my apology to the women and girls whose voices should have been heard long before now.” He didn’t immediately respond to an email requesting further comment on Monday.

Emails dated from 2009, just as the financial crisis ravaged Britain’s banking system, show a memo written by an aide to then-Prime Minister Gordon Brown advising the government to draw down debt by selling some 20 billion pounds in assets, equivalent to about $27 billion if converted today. Mandelson, who was at the time the U.K. business secretary, forwarded the email to Epstein, who would have been in a position to trade on privileged information. Epstein replied: “what saleable assets,” to which Mandelson said, “Land, property I guess.”

The author of the note, Nick Butler, a former senior policy adviser to the government, told the Times of London: “I am disgusted by the breach of trust, presumably intended to give Epstein the chance to make money.” In a statement, Gordon Brown also demanded an inquiry into the matter.

Several British political parties, including Reform UK, which is leading the polls, called on police Monday to formally investigate Mandelson for leaking confidential information. In a statement, the Metropolitan Police said it was aware of the allegations and would review them “to determine if they meet the criminal threshold for investigation.”

Britain’s Telegraph newspaper reported that the U.S. House Oversight Committee is poised to ask Mandelson formally to testify about the Epstein case.

In May 2010, Mandelson appeared to confirm to Epstein during the height of the eurozone crisis that a €500 billion bailout package was about to be unveiled. “Sd be announced tonight,” he wrote in response to Epstein’s email saying the bailout package was “almost complete.”

Other emails show that Epstein wired three transfers of $25,000 to Mandelson back in 2003 and 2004, when he was a Labour lawmaker. Emails also show that Mandelson’s partner, Reinaldo Avila Da Silva, asked Epstein in 2009 to wire money to cover the cost of his enrollment to an osteopathy-training course. Epstein replied he would wire the “loan amount” immediately. “You are the only person who knows everything about me,” Mandelson wrote to Epstein in 2009. “Don’t go away.”

Starmer has faced questions about why he promoted Mandelson to the role of U.S. ambassador in 2025 given his ties to Epstein were already well-documented. A spokesman for the prime minister said Mandelson hadn’t disclosed the full extent of his ties to Epstein at the time of the appointment.

The latest batch of emails released by the Justice Department include other high-profile members of the British establishment, notably Andrew Mountbatten Windsor, the former prince and brother to King Charles, who has already had his titles removed and is being forced out of his mansion on Windsor estate.

The latest emails, which all date after Epstein pleaded guilty to procuring minors for prostitution in 2008, show Andrew invited Epstein for tea at Buckingham Palace in 2010. Photos also released by the Justice Department show Andrew photographed kneeling over an unidentified woman.

Andrew, who didn’t reply to an email requesting comment, last year said he continued to “vigorously deny” allegations that he abused an American teen introduced to him by Epstein.

Epstein wrote to Andrew in August 2010, “I have a friend who i think you might enjoy having dinner with, her name is irina she will be london 20-24.” Andrew replied: “I am in Geneva until the morning of 22nd but would be delighted to see her. Will she be bringing a message from you?”

A U.K. government spokesman said Andrew should also provide evidence to the U.S. authorities regarding Epstein.

Last year, Charles looked to remove his younger brother from public life and distance the monarchy from his alleged actions. The king removed Andrew’s “prince” title, and is in the process of rehousing him far from Windsor Estate. The palace referred all questions to Andrew.

The emails also shed light on the friendship between Andrew’s ex-wife Sarah Ferguson and Epstein. In 2009, Ferguson wrote to Epstein calling him the “the brother I have always wished for.” She penned another email saying she urgently needed £20,000 to pay her rent. In another, she wrote, “I am at your service, just marry me.”

In September 2011, an email from a redacted address, signed “Sarah,” said “the Duke” had informed her that Epstein had a baby boy. It was followed by a message saying, “it was soooo crystal clear to me that you were only friends with me to get to Andrew.” Ferguson didn’t immediately reply to a request for comment.