France has declared a mandatory quarantine period for people coming from the United Kingdom due to the increasing prevalence there of a highly contagious coronavirus variant first detected in India.
France follows Austria, which on Tuesday said it was banning direct flights and tourist visits from the UK, and Germany which on Friday said anyone entering from the UK would have to quarantine for two weeks on arrival.
"There is a new situation with the progression of the so-called Indian variant in the United Kingdom," said government spokesman Gabriel Attal.
"(France) will set up compulsory isolation for people coming from the United Kingdom."
Attal did not say how long the quarantine period would last.
There would be more details in the next few hours, he added.
Coronavirus infections in the UK have been rising again but the overall incidence is still low in a country with one of the world's fastest vaccine roll-outs.
Clusters of the B.1.617 Indian variant have, however, grown quickly, to 3424 as of May 20, up by 2111 compared to similar numbers the previous week.
The Indian variant has been reported in at least 17 countries.
The French government's announcement will be a blow to a beleaguered tourism industry that is desperate for a return to normal business ahead of the peak summer season.
British tourists had been due to be allowed to visit France without restrictions from June 9 if they carried a certificate of vaccination against COVID-19 or a negative PCR test.