In terms of the school, you probably wouldn't need to be Anglican or even Christians to send your kids there - they aren't like Catholic schools in that sense I had girls of other religions at my Anglican school. But you will probably find they have weekly chapel services and other special services - Christmas, Easter etc. They are pretty aware that the majority of kids are unchurched and try to be inclusive without forcing it, if that makes sense.

In terms of baptism, it will probably be up to the individual minister. Some will happily do baptisms for non-church families, but others might not. They will probably care more about your actual beliefs- they mightn't be keen to do it if you were atheists, for example. But why would you want your child baptized you were an atheist lol.

Hth xo