Admissions criteria only come into play when a school is oversubscribed. But parents need to be aware especially as under/over can change year by year.
I worked in a C of E state secondary school. There were 12 contributory parishes each with their own priest. ( I attended one of these and was a Church Warden for some years)
The admissions forms and criteria were overly wordy and complex.
It was quite an unfair system as Priests would, probably honestly, interpret their responsibilities and the criteria in different ways.
Some expected weekly attendance, membership of groups etc from y4 onwards. At the other extreme others would support admission if you’d been at Christmas once or twice.
Some families put down long dead or moved on priests as their faith references.
My own church had signing in sheets. Some signed the sheet, in the entrance, and then went home. So lists put out at end of service - big congregations of people who didn’t want to be there, others signing for friends. All a mess and unfair.
One of the deciding factors was a member of the congregation who, due to recurrent illness/hospital stays couldn’t attend and sign. Her child was rejected.
We scrapped the signing in sheets and said that those interested should let the Church know of their interests, introduce themselves. It seemed fairer - but legally it wouldn’t have stood up to inspection.
I’m not at the school any longer. It’s over subscribed but to an extent self selecting. It’s selective reputation precedes it and so many simply do not apply.
I’m not sure what the answer is but I’d recommend that parents read the admissions criteria well in advance and then decide on their plans.
Am I in favour of faith schools - no, not now.