France has described a decision to impose quarantine isolation on all travellers arriving in England from France - and unlike from other EU countries - as excessive, discriminatory and 'scientifically unfounded'.
Tighter French border security and insufficient staff numbers combined to cause massive queues of holidaymakers heading to continent via port of Dover.
Assistant chief constable Mark Roberts said his police spotters saw Russian 'Ultras' putting on gum shields and martial arts gloves before Marseille violence.
The four-yearly football championship began Friday in Paris with a peaceful win for the French hosts 2-1 over Romania, while England fans battled police in Marseille.
Two England fans were arrested after clashes with local youths in the Old Port district of Marseille ahead of Saturday's England-Russia Euro 2016 match.