Aren't their different levels of faith school?
Ie there are loads of C of E schools….My Dad is a head teacher at one, none of his children are christened/baptised…whatever, and he's worked tirelessly to beat the local minister into submission only allowing him 15 mins a week to talk religion. It is the only school in that village, to avoid it would mean a 20 min drive.
On the other hand there are full blown bible bashing Catholic schools where an hour+ a day is devoted to religious studies with nuns taking many of the classes?
If you're not religious and send your child to one of the latter… have a word with yourself!