Johann Hari has this article in the Indy, which I saw by chance, not being much of a fan of his ill-informed dogmatism. On the central point of the article I have little to say, beyond the observation that it seems to be pretty much a dead letter anyway, and most children go to religious schools because their parents choose to send them there. Also, one man's indoctrination is another's education, as evidenced by this from the comments thread:
"hcurtiss: Religious education is actually child abuse
Subdisciplines of Linguistics.
9 hours ago