Steinberg’s notice period is 12 months and the board will now launch a search for his successor.

Chair Richard Huntingford said: "I would like to thank Jon for the significant contribution he has made to the group. Whilst we are disappointed that he will be departing next year, we respect Jon's decision to return to the US.

"The Growth Acceleration Strategy he has implemented is well underway and, as highlighted by the pre-close update announced in September, continues to drive good strategic and financial progress. We will continue to work closely with Jon over the course of his notice period as we look to appoint his successor."

Future’s full-year results are due on 5 December.