I am a British Citizen living in France, I hold a French EU-Article 50 (Brexit) residency permit.
Is there any risk that I'd be stopped when returning to France from the UK on my British passport because it has less than six months' validity? I'd obviously present my French residency permit too!
Residents of France may enter using travel documents which are valid on arrival.
This applies to holder of resident visa. For normal visa, the passport must be valid for 3 months from the date of departure.
See also: https://www.gov.uk/guidance/living-in-france
If you have rights under the Withdrawal Agreement, you can enter and exit EU countries with a valid passport. You do not need any additional validity on the passport beyond the dates on which you are travelling.
tl;dr - You can enter with passport which is valid for less than 3 months, provided you have the resident visa.
