After delays caused by Covid, the festival confirmed it would take place in early July, but France has announced a seven-day isolation period for visitors from the UK in response to rising concerns over the Covid variant B.1.617.2, first detected in India.
British participation in at the Cannes film festival is under threat after new quarantine regulations put into place by the French government as the country seeks to successfully exit lockdown.
The move is likely to affect thousands, both among the press corps and industry delegates, and large numbers of unregistered attendees.
Delegates and press from the US, another significant section of Cannes attendees, also face obstacles, but at present appear less restrictive for July.