British holidaymakers could need to quarantine on returning home as air bridges reportedly face being pulled at short notice for countries where coronavirus is surging.
The UK is reviewing the nations on a 74-strong “safe” list every three weeks currently.
But the government is considering replacing this with a rolling review system that could see countries removed suddenly, the Daily Telegraph reports.
This means holidaymakers who have travelled in good faith to Europe could face unexpected 14-day quarantines on returning home.
The news comes as cases in Spain, an original epicentre for coronavirus back in March, are surging again.
Yesterday 2,615 new infections were recorded, with increasing numbers of Brit holidaymakers heading back to the country for a summer break.
It is thought that the government will today confirm that Spain will stay on the “safe” list for now despite many regions of the country bringing back restrictions.
But there is no guarantee a worsening of the situation in Spain will not see it removed further down the line.
The rise in cases has prompted scores of British holidaymakers to cancel at the last minute, authorities said.
Elizabeth Keegan, director of tourism in Lloret de Mar, told the Telegraph: “We are getting cancellations from Britain, France and Belgium.
“The 120 hotels here are about 65 per cent full and they are normally 100 per cent full at this time of year.”
Spain’s Ministry of Health has appealed to all holidaymakers planning a visit to make sure they fill their health control forms and added: “If you have symptoms, stay at home.”
Despite the new outbreaks on the mainland and islands Spain has issued a “tourism is safe” message but admits there have been holiday cancellations.
Tourism minister, Reyes Maroto said tourists were worried about the current situation and any threat to their health and some had decided not to go ahead with their travel plans.
“Right now, the regrowth continues to generate insecurity and cancellations are taking place in some destinations,” Maroto confirmed yesterday.
She said she understood the concerns but assured that consumers would be safe.
The first review of travel corridors under the new system is understood to make very few changes to the 74 destinations exempted from the 14-day quarantine.
Portugal remains fearful it will not be added to the list.