The holiday hotspot could still ask fully-vaccinated Britons to quarantine for two weeks upon arrival as it would not recognise the jab produced in India. The UK Government tried to discuss a potential rule change so double-jabbed Brits can visit the popular destination without having to isolate, the Telegraph reported.
Portugal’s current coronavirus guidance states that tourists who have not been fully vaccinated with an approved jab must quarantine for 14 days upon entry.
The Indian-made jab has yet to be approved by the European Medicines Agency.
However, each individual country in the European Union is free to decide its own entry rules.
France and Croatia have been recently added to a list of EU nations that recognise the Indian jab.
The body warned that the cost of Government-mandated self-isolation in Spain will not be footed by the British Government.
The FCDO said: "If you are staying in a hotel or resort, your accommodation provider may have a list of private doctors that they can call to assess your symptoms and conduct a Covid-19 test."
It added: "If you are tested and the result is positive, you must self-isolate in your accommodation and call your regional hotline or one of the alternative helpline numbers as set out above. You must remain in your accommodation until contacted by local Spanish authorities. Contact times may vary across regions and can take up to 48-72 hours.
"You may be able to remain in your existing accommodation or be required to transfer into a state hospital or other government-provided accommodation. You may be required to fund accommodation whilst you wait to be transferred.”
Boris Johnson hints Rishi Sunak has LOST Covid travel wars [REPORT]
‘Realistic possibility’ of super Covid variant [INSIGHT]
Fully vaccinated US and EU travellers to skip quarantine [UPDATE]
An EU spokesman told The Telegraph: "Several member states have not yet finalised their positions regarding the correspondence of vaccines for the purpose of travel.
“As soon as they will have done so, we will publish a list of corresponding vaccines on the ReopenEU website."
Paul Charles, chief executive of travel consultancy The PC Agency, added: "If the vaccine is good enough to be accepted for use in the UK, we need to see the Government pushing these countries further to accept UK visitors who have had it."
Meanwhile, British tourists in Spain have seen restrictions tightened amid a spike in coronavirus cases.
In response to this, the Foreign, Commonwealth and Development Office (FCDO) issued new travel guidelines for Britons.