The anti-pollution move concerns Monday to Friday daytime access and will become an outright ban in 2020, when access for pre-2011 cars will be restricted.
Assistant chief constable Mark Roberts said his police spotters saw Russian 'Ultras' putting on gum shields and martial arts gloves before Marseille violence.
A move to protect the traditional 17th-century soap from cheap foreign immitations sparks a firece dispute among its different makers over its true contents.
Unions claim 70% of pilots are involved in the four-day pilots' strike, to end Tuesday, but airline says 85% of long-haul and domestic flights will operate Monday.
The strike, in protest against proposed wage cuts and working hours, which will last until Tuesday, joins separate protest strikes by rail and waste collection workers.
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.