Thunder Bolt
Silly old bat
You won't be able though. You will require permission. Also, think further than your own face and try again.
He can probably go for a visit, but stay any longer that 90 days and he'll have to apply for a carte sejour. Then after five years apply for permanent residence, which even in the EU was applicable.
https://europa.eu/youreurope/citize...eu-nationals-permanent-residence/index_fr.htm
What happens after next March is anyone's guess.