Typical of Britain, modeller, is that the law and practice follow the public. The BBC is required by law, in its constitution, to 'pump out' a given time of Christian religion. It does its best to ignore this, because its public has changed. That's why the 'daily service' is only on long wave. The BBC's head of religious broadcasting is a Muslim, which suggests a certain breadth of approach to the whole subject!
The old Education Act, 1944, required schools to have a Christian assembly and religious education 'broadly Christian in character' That was watered down both in practice and law later. Apart from the general view of the public, it was a little impractical when some schools had 80 per cent or more Muslim intake. Some such were C of E schools. C of E schools in the state system are themselves a historic anomaly, from the fact that so many schools were founded as church schools.