You have to teach the National Curriculum, however what happens in practice, as opposed to in theory, is that it is possible to teach the Science curriculum, but somehow, amazingly, all the children in the class come to the conclusion that evolution is unproven.
It may not be large numbers of schools, but they are increasing, and there are still hundreds of children passing through them.
The principle of course is the real problem. If Coca Cola, a Brewery or a tobacco company, offered 10% of the price of building the school in return for the massive level of control that it would receive for ever more there would be an outcry.
It would not be seen in the public interest for our children to exposed to the indoctrination. And yet, despite the evidence from areas of conflict like Northern Ireland or Israel, dividing children arbitrarily along religious lines, emphasising their difference over community cohesion and preventing them from being truly educated, by being exposed to ideas their parents might disagree with, is seen as something to be applauded. I don't get it.
And Mummytime, we are not just talking about Church schools, we are talking about all faiths - Jewish, Muslim, Hindu and schools which are funded by wealthy individuals with a particular world view.