Figures from TravelSupermarket show that in the past week there has been a 64% fall in the average price of a seven-night trip to Portugal in July and August 2021.

The holiday comparison site added that clicks on holidays to Portugal had also dropped by 85% week-on-week following the government’s decision.

TravelSupermarket said seven-night family breaks to popular destinations on the amber list this summer were now available from £180pp during the peak school holiday period.

Emma Coulthurst, from TravelSupermarket, said: “It would, in normal times, be fairly hard to find a seven-night package holiday during the summer school holidays from under £300pp.

“You can understand why it has got to the point where foreign holidays from the UK during this period are available from under £200pp.

“The industry has many holidays to sell. Yet, the government’s failure last week to follow its own traffic light system and offer a watchlist and base its decisions on countries’ data has created a lack of clarity for holidaymakers.

“Prices are often the most expensive at the start of the school holidays as people are itching to get away as soon as they can. This year, they are some of the cheapest due to the current confusion and chaos over how the traffic light system is implemented.”