Here's a link to the euro tunnel info - https://www.eurotunnel.com/uk/travellin ... /covid-19/
I expect they have to keep up to date with the situation.
I assume you'll still have to take a test in France before going - but will check later, by that time the rules will probably have changed again - I see La Reunion has been moved to Red so they've finally discovered it's not actually part of mainland France.France update from Sunday 8 August
If you arrive in England from 4am Sunday 8 August, and you are fully vaccinated in the UK, USA or Europe, you will not need to:
quarantine on arrival in England
take a day 8 Covid-19 test
You must still book and take a day 2 Covid-19 test.