At the moment, new information is being published almost daily. However, these websites should have the latest updates.
Information from the French government:
Information from the British Embassy in Paris:
And practical advice and updates from the British Consular Services in France:
English-language newspaper The Connexion France:
British in France (representing Associations in France)
Comments on the recent French paper in the case of a no-deal Brexit
News and Information from Remain in France, useful tips about French administration processes