My ex had a son who lived with us and I remember he had RME (Religious and Moral Education, which may just be a Scotland thing) and it covered all types of religions.
I'm not religious, and in the US I very much think it does not belong in schools for anything other than learning about history/culture, but that's because it's a very different animal in the US, to me anyway. Plus, we do (in theory, though not in practice really) have separation of church and state.
The fact that there was religion in schools in the UK didn't bother me, because while there is not a separation of church and state in the UK, people still seem to very much keep their religions as a separate part of their lives. I mean, aside from the sectarian nonsense (which is hardly about religion anymore and more so just a bunch of dolts who go on hating each other out of tradition), people don't let it define them the way many do in the US.
It just seemed much less loaded. But this is only my perception and experience in one part of the UK. I'm not sure what happens elsewhere!