Stansted Airport said in a statement: “All private aircraft at London Stansted operate through independent Fixed Base Operators, which handle all aspects of private and corporate aviation in line with regulatory requirements.”

The airport said that these terminals are “entirely independent” and that “no private jet passengers enter the main airport terminal”.

Immigration and customs checks for passengers arriving via private jets are carried out “directly by Border Force”, it said, adding that it does not “manage or have any visibility of passenger arrangements on privately operated aircraft”.

The Essex Police statement comes as a new national group has been set up to support UK forces that are “assessing allegations” following the publication of the Epstein files, the National Police Chiefs’ Council (NPCC) has said.

Thames Valley Police is assessing allegations, reported by the BBC, that a second woman was sent to the UK by Jeffrey Epstein for a sexual encounter with Andrew Mountbatten-Windsor.

The force previously said it has held discussions with specialists from the Crown Prosecution Service about the allegations that Andrew shared confidential reports with Epstein during his time as the UK’s trade envoy.

The former prince has always denied any wrongdoing.

Earlier this month, the Metropolitan Police launched a criminal investigation into Peter Mandelson following claims he passed market-sensitive information to Epstein.

Two properties linked to the former business secretary and British ambassador to the US were searched following the allegations.

The BBC understands Lord Mandelson’s position is that he has not acted in any way criminally and that he was not motivated by financial gain.

Lord Mandelson has previously expressed regret for his continued association with Epstein and apologised “to the women and the girls who suffered”.

He was dismissed from his role as ambassador in September, after Downing Street said new information had emerged about the depth of this relationship with Epstein.