My children attend a Catholic school in Northrtn Ireland. We loosely practice, attend mass infrequently. The school criteria does not mention religion at any point. Criteria ia roughly 1, siblings, 2, first borns, 3 identufied radius x, identified radius y. In case of over-subscription randomised alphabetical surname e.g j, k, a...which is provided to prospective parents pre-application. The school is outstanding, massively over-subscribed and attracts non catholics because of this. Everyone accepts the Catholic ethos and in return get a first class school.
My point is that if i, or my neighbours, choose this faith school for reasons other than faith (geography, quality, whatever) then we are accepting that ethos but are not obliged to follow it ( or even pretend to, there's practising muslim children in this school) I wonder would this approach be more acceptable in the rest of the UK?