And for those people saying there should be no faith-based education, well, I can only disagree on that. I think people of faith have the same right to educate their children within their principles as people of no faith, and if the state is going to provide for one group, they should provide for the other.
But that right doesn't currently exist. For Catholics and Church of England adherents, it's something of a lottery - is there a school that matches your faith nearby. For people of other Christian sects and other faiths they do not get that provision.
I agree with you that if the state is going to provide for one group, they should provide the same for all groups. I can't see how that is remotely practicable, so the most equitable solution is a level playing field for all. State education that does not take a position on the question of faith. That educates about all religions, but does not indoctrinate.
Religion isn’t separable from how you educate your children, in my opinion.
People in many other countries manage without state-funded faith schools, with far higher rates of religious observation than in this country. Food for thought.
I get that the system is currently stacked in your favour and it's comfortable to think that it's the only way to operate, and uncomfortable to reflect on the impact of that on other people.