Many are all still below their share prices from June 23 amid concerns that Brits may be put off travelling.

Thomas Cook, which is part of the FTSE 250 index, plunged from 73p to 53p, before rallying slightly to finish at 62p on Monday.

Tui Group, On The Beach, easyJet and Flybe were also big fallers.

While the larger tour operators had already sold a significant amount of their summer 2016 holidays before June 23, they will still be reliant on the lates market.

In its first-half update in May, Thomas Cook said the UK was 66% sold with bookings 3% lower than last year. The firm put this down to the later booking pattern of holidaymakers wanting to go to Turkey.

In the same month Tui Group said it was 65% sold in the UK, which it said was “ahead of the prior year”.

Leisure analyst Mark Brumby of Langton Capital said tour operators would likely see a rough end to the summer following the referendum result.

“It’s not helpful because uncertainty and a willingness to sit on your hands financially are positively correlated. You tend to hold off particularly on big ticket purchases so things like carpets, curtains, houses, cars, [and] holidays – you may postpone them,” he said.

“The majority of people who are flying now in the summer will have booked but it’s not helpful for the lates market.”

Cook and Tui have yet to offer any guidance post-Brexit, but last week easyJet said the performance in its third quarter would in part be impacted by the referendum result.

Meanwhile, the uncertainty appears to be good news for foreign firms. The co-founder and chairman of Chinese conglomerate Fosun has made good on his promise to take advantage of post-Brexit volatility by upping his stake in Thomas Cook.

Companies with links to Guo Guangchang now own 8.2% of the tour operator, having taken an initial 5% stake in March 2015 for £92 million. At the time it was suggested Fosun would look to build its stake to around 10%.

Speaking at a Reuters event last week, Guangchang said the firm would look for opportunities in the UK and Europe. “For a value investor, volatility is a friend not an enemy. Market volatility and panic will probably bring better investment opportunities,” he said.

Fosun previously took its shareholding in Cook above 7% at the start of June.