My decidedly non-religious dd and SiL were only too pleased that their 2 elder Gdcs were eligible for the local C of E primary and are very pleased with it - it’s a highly rated and very happy school.
Of course there is a certain emphasis on C of E aspects but that is surely only to be expected. In any case much of what they learn - Bible stories etc. - is - to me, anyway - part of general knowledge.
I don’t know about anybody else, but the fairly mild C of E variety of religion was part of every day school life for me in the 1950s and 1960s - morning assembly with prayers etc. - as it was for dh, and neither of us has ever felt that we were ‘brainwashed’ - once we could think for ourselves we made our own minds up about faith, or lack of it.
It was different for Catholics, I dare say - some of the things I’ve been told by an Irish Catholic friend are enough to make one’s hair stand on end.