I'm happy to note you've ranked "Catholics" slightly ahead of the "whatever" category. If you were older, that would be "The Papists" ...
Catholic schools here aren't even really real Catholic schools like they are in America, they're a lot more laid back and the main difference between them and normal schools is just that they're actually legally allowed to be subtly overtly Christian.
When I lived in Wales I went to what were supposed to be normal "comprehensive" schools but because it's Wales everyone was white so they were able to indoctrinate us with Protestant Christian values and make us say the Lord's Prayer in assembly. They got away with it even though it wasn't a designated Church of England "faith school" because there weren't any minorities to complain and there's no official separation of church and state in the UK (The Queen is both official head of state and head of the church)
In my school in England it was a different story. The area was more diverse and we actually had brown people who belonged to other religions so they couldn't get away with making everything very Christian-centric. They certainly didn't make us say the Lord's Prayer or sing hymns in assembly.
So around here you have to go to the official Catholic school to get a proper Christian education because they're allowed to do it, but it's not the American stereotype of a Catholic school with girls in knee-length skirts or knee high socks and Nuns as teachers