It's not taking them that's a problem, it's what faces you when you come back.
The mutts Julian may be chipped, vaccinated to oblivion and have multiple passports, but rabies is alive and well in many parts of France and despite your doggies qualifications, you may have to leave them in quarantine for a couple of months when you get back.
Leave them in a top hounds hotel in Yorkshire while you do the same in France, they'll have a good time, so will you and they'll be very pleased to see you when you get back.