> Anyway, I want to know what advice the F.O. are giving to people already holidaying in France as I have a relative on holiday in Paris right now. Been ok so far.
You can see the FCO advice here:
https://www.gov.uk/foreign-travel-advice/france
Also at that page, you can subscribe for email updates.
The current state is as follows ...
Since 27 June, riots have taken place across France. Many have turned violent. Shops, public buildings and parked cars have been targeted. There may be disruptions to road travel and local transport provision may be reduced. Some local authorities may impose curfews. Locations and timing of riots are unpredictable. You should monitor the media, avoid areas where riots are taking place, check the latest advice with operators when travelling and follow the advice of the authorities.
French authorities have banned a rally by groups opposed to the government in Iran planned for 1 July in Paris, due to concerns about security risks; connected events are reported to still be going ahead, however, including in the suburb of Auvers-sur-Oise. A demonstration by the same group in Paris in June 2018 was the target of an attempted bomb attack. British nationals should reconsider any plans to attend such meetings, and if you do, be aware of your surroundings at all times, and move away quickly from disturbances.