Portugal stays off the record of nations that the federal government has exempted from quarantine restrictions.
In modifications that apply to England, travellers from Estonia, Latvia, Slovakia, Slovenia and St Vincent and the Grenadines will not must isolate.
It takes the list of countries that do not face travel restrictions into England to 80 nations.
The authorities additionally mentioned it should replace steering weekly, which means guidelines may change whereas individuals are away.
It mentioned individuals ought to repeatedly examine the recommendation. Previously, updates had been offered each three weeks.
The steering comes as an infection charges start to alter throughout Europe.
On Friday, Norway introduced that it was imposing a brand new 10-day quarantine on all travellers arriving from Spain after a spike in circumstances there at common vacation resorts.
The newest information from the European Centre for Disease Prevention and Control (ECDC) confirmed coronavirus infections in Spain had risen to 30.9 per 100,000 inhabitants.
Portugal’s failure to make the exemption record will come as an enormous blow.
Tourism is a significant business within the nation and is common with British holidaymakers, with virtually three million UK guests a 12 months.
Aviation information analysts Cirium mentioned there have been 2,333 flights attributable to go away the UK for Portugal earlier than the tip of August.
Paul Charles, chief government of the PC Agency, mentioned it was a badly timed transfer by the federal government.
“The scale of these attributable to go there earlier than finish of August is big. The determination right now vegetation large uncertainty within the minds of those that are booked who shall be on the lookout for refunds and modifications and most will not have a vacation. It’s going to trigger uproar for operators and business.”
He added: “They aren’t ready to open Portugal when scenario is declining, however circumstances in Spain are hovering, with speedy rises of their case numbers.”