Institute chairman Steven Freudmann said there were “lots of questions and no answers” about how Brexit will potentially affect the travel industry.

A poll at the ITT Conference in Tel Aviv earlier this month found that 76% of delegates were in favour of staying in the EU.

“Personally I’m very depressed, very saddened and annoyed at my fellow UK citizens,” said Freudmann.

“It’s a huge worry and sad for the industry. I’m very concerned about the effect this decision will have on the industry.

“We want answers to questions sooner rather than later. We will be asking for meetings with politicians very quickly so we can try to pressure them into coming up with the necessary answers.

“From all the ITT polling and all the soundings, the overwhelming view was to stay in the EU – this was quite understandable as we don’t want barriers to stand in the way of free trade.”

Freudmann said the ITT wanted information urgently from Leave politicians and the government on issues such as visa-free travel for British tourists visiting the EU and how the UK will operate within the European Common Aviation Area.

“We are seeking for politicians to stabilise everything as quickly as possible and give us answers to these questions so that this uncertainty can end,” he added.

Freudmann also raised questions about how the referendum result will affect the government’s decision on expanding airport capacity in the south-east, which is supposed to be taken this summer.

“What’s going to happen to runway capacity?” he asked. “I am hoping David Cameron will make a decision during his last three months in office. We have assumed the delay in this decision was due to the EU referendum.”

Freudmann also said there were questions over reciprocal health arrangements such as the European Health Insurance Card (Ehic) and the impact on mobile network data roaming charges.

“Ehic cards have been a huge bonus to most travellers and we would like to see that the EU continues to give us reciprocal health treatment,” he added.