Andrew told BBC Newsnight in 2019 that he last saw Epstein in New York in early December 2010 to tell the disgraced financier he was breaking off the friendship.

However, on Christmas Eve that year, he emailed Epstein a confidential briefing on investment opportunities in the reconstruction of Helmand Province, Afghanistan, which was overseen at the time by British armed forces and funded by UK government money.

By this time, Epstein was already a convicted sex offender.

Sir Vince Cable, who was then business secretary, said: “I was unaware of Andrew… sharing information about investment opportunities [in Afghanistan] before, this is the first I’ve heard of it.”

In a further email dated 9 February 2011, Andrew suggests Epstein might invest in a private equity firm he visited a week before.

Official terms of reference for trade envoys state that they “are not civil servants”, adding: “However, the role of a Trade Envoy carries with it a duty of confidentiality in relation to information received. This may include sensitive, commercial, or political information shared about relevant markets/visits.

“This duty of confidentiality will continue to apply after the expiry of their term of office. In addition, the Official Secrets Acts 1911 and 1989 will apply.”