DEMANDS for a post-monarchy Britain grew yesterday as a poll revealed support for a royal family has fallen to 45 per cent amid the ongoing Epstein scandal.

Labour for a Republic backed demands for the royal family to come clean over who knew what and when about Andrew Mountbatten-Windsor’s conduct.

Thames Valley Police confirmed on Monday that it was assessing suggestions that the King’s brother shared confidential reports from his role as Britain’s trade envoy with sex offender Jeffrey Epstein.

Files related to Epstein released by the US Department of Justice also suggest that a second woman was sent to Britain by paedophile Epstein for a sexual encounter with Andrew, and that the former prince and Epstein asked an exotic dancer for a threesome in the latter’s Florida home.

Buckingham Palace said on Monday that the King had made clear his “profound concern” at allegations about his brother’s conduct and the Palace will “stand ready to support” the police if approached over fresh claims.

A heckler asked him: “How long have you known about Andrew?” in Lancashire that day.

The Prince and Princess of Wales meanwhile said that they were “deeply concerned” at the “continued revelations.”

Labour for a Republic said that MPs should demand the monarchy explain who knew what and when about Andrew’s conduct.

The group’s Ken Ritchie said: “Expressions of sympathy for Epstein’s victims are to be welcomed. But why have they taken so long.  

“And it’s ironic that William has released his statement while visiting Saudi Arabia, a country where all women are victims of a regime that denies them their rights and which has imprisoned and tortured women who have demanded reforms.”

The Savanta poll was commissioned by the anti-monarchy campaign group Republic.

Its chief executive Graham Smith, who reported Andrew to the police over the trade envoy allegations, said: “The monarchy is losing its one claim to legitimacy, opinion poll ratings.”

He stressed the “urgent need” for a “serious and honest debate” about a post-monarchy Britain.

Mr Smith added: “The monarchy is not going to reverse this trend of falling support. The late queen was the one person keeping this creaking institution going. Even her legacy is now being tainted by the Andrew scandal.”