LONDON — Keir Starmer will strive for “maximum transparency” when releasing files on Peter Mandelson’s appointment as British ambassador to the U.S., a senior U.K. minister said Wednesday.

Health Secretary Wes Streeting said the prime minister wants to release as much information into the public domain about how Mandelson was appointed, his correspondence with ministers and his subsequent sacking last September over the former Labour peer’s friendship with convicted sex offender Jeffrey Epstein.

“The prime minister’s going for maximum transparency here,” Streeting, a former friend of Mandelson, told Sky, though added the PM is “obviously drawing a line” by “not releasing information where it might compromise our national security and our security services, or where there may be information in there that might undermine international relations with other countries.”

The opposition Conservatives have put forward a humble address — a parliamentary message to King Charles that was favored by Starmer during his time as leader of the opposition — calling for “all papers” relating to Mandelson’s appointment last year to be published.

These include “due diligence which was passed to Number 10,” conflict of interest forms over his work in Russia and China, and correspondence (including electronic communications) between Mandelson, ministers and the PM’s Chief of Staff Morgan McSweeney — who encouraged Starmer to send the then Labour peer to Washington.

The government has published an amendment to the address accepting the Tories’ request, with the caveat that it will exclude “papers prejudicial to U.K. national security or international relations.”

U.K. lawmakers will debate the substance of what should be released this afternoon.

“What we’ve seen in recent days also is a prime minister acting rapidly to make sure that Peter Mandelson is stripped of all of the titles and privileges that were conferred on him through public service,” Streeting told the BBC, calling his behavior “so jaw-droppingly stupid and outrageous.”

The Metropolitan Police confirmed Tuesday evening that Mandelson is under investigation for alleged misconduct in public office after it appeared he leaked sensitive government discussions at the height of the financial crisis to the late financier.

Mandelson didn’t immediately respond to a request for comment on the investigation on Tuesday evening. He has previously said he was wrong to have continued his association with Epstein and apologized “unequivocally” to Epstein’s victims.

And in a Times Newspaper interview that was conducted before the most recent batch of Epstein files were released, Mandelson attempted to explain his historic association with the disgraced financier.

“I don’t know what his motives were — probably mixed — but he provided guidance to help me navigate out of the world of politics and into the world of commerce and finance,” Mandelson told the newspaper.

Mandelson didn’t immediately respond to a request for comment on the investigation on Tuesday evening.

Mandelson also resigned from the House of Lords and left Labour following the latest tranche of correspondence in the Epstein Files.