Fears are growing that Spain could be on the brink of a deadly second wave of coronavirus.
The country has been hit by 200 separate outbreaks since safety measures were relaxed in June, and several regions are on high alert.
Recent data has shown the highest daily cases since early May.
In light of the current COVID-19 risk, the FCO advises against all but essential travel to mainland Spain.
And anyone arriving in the UK from Spain must now quarantine for 14 days, effective immediately.
While the FCO does not advise against travel to the Canary Islands (including Tenerife, Fuerteventura, Gran Canaria and Lanzarote) or the Balearic Islands (Mallorca, Menorca, Ibiza, and Formentera) - travellers will still have to self-isolate for two weeks when they return.
Has Spain gone into lockdown again?
While the whole of Spain has not gone back into lockdown, certain regions have been forced to reimpose measures.
The tourist town of Totana, in Murcia, has been closed off after a spike in infections, believed to be linked to the nightlife, caused concern.
It is the first area forced to return to the strict "phase one" of the Spanish government's coronavirus lockdown.
The Catalan regional government has rejected the idea of a total lockdown, but has urged residents to avoid gatherings of more than 10 people.
Bars and restaurants have been asked to reduce capacity, while police temporarily closed beaches in Barcelona after people failed to respect social distancing.
The Spanish government has insisted the infection rate is under control, but health officials in Lanzarote and the Costa del Sol are on high alert.
Can I still travel to Spain?
According to the current FCO advice, Brits should not travel to mainland Spain.
If you ignore Foreign Office travel advice, your travel insurance will not be valid.
Anyone coming into the UK from any part of Spain (including the Canary Islands and the Balearics) is now required to self-isolate for 14 days upon their return.
The Spanish government is urging people to wear face masks as much as possible to curb the spread of the disease.
