The securing of ex-PM David Cameron’s former sidekick as a keynote speaker for the event in Sorrento is a coup for the ITT, which adds the backbench MP to a long list of high-profile politicians it has attracted as speakers.

ITT chairman Steven Freudmann said he had contacted Osborne immediately after he was replaced as chancellor when Theresa May took office, and secured his agreement to speak. “He will be talking about the economy and the progress – or lack of it – that Brexit negotiations have made by next June,” Freudmann said.

“It will be interesting to hear his reflections on Brexit – he was a Remainer, as were so many in the travel industry – and to hear his views on the expansion of Heathrow, of which he is a big supporter,” Freudmann added.

The ITT has secured exclusive use of the Hilton Sorrento Palace Hotel for the event on June 12-14. Freudmann said more “top line” speakers would be revealed soon. “We have some big-name speakers from the industry too,” he said, adding that 60 of the 400 places available had been sold on the first day of registration and that delegate registration fees of £485 had been pegged at this year’s level. Companion rates are £285 with all delegates arranging their own flights and transfers. Rates for delegates increase by £100 from January 1.

The conference programme starts on the Monday with a golf tournament and welcome party. Tuesday will feature business sessions, free time in the afternoon and a gala dinner. The final day sees the same format with a farewell party in the evening.

ITT is returning to a European destination after this year’s event in Tel Aviv. “We have been to the Middle East, Israel and Barbados and our members felt it was time to have a short-haul destination. This is perfect – Naples is only two and a half hours away from the UK, and 45 minutes from Sorrento,” added Freudmann.