The French have an even better idea. No religious teachings, clothing, or symbols are allowed or promoted in the state education system. After you're 18, it's up to the individual to decide.
I think you'll find most of northern Europe is heading the same way along with the Scandinavians. Also with the eastern European and Russian independent states now westernising. Though religion was banned during communism, it has never recovered post communism.
It will also help in the future dealing with the worlds biggest import/exporter the Chinese, who tend to be Agnostic/Atheist.
There are plenty of other things wrong with Britain like the 'nanny state', but religious zealots are one of the things being tackled.
Even the Church of England may be forced to perform 'Gay' marriages, how the catholic church, Islam and the rest react will be interesting. If the C of E have to do this, then it will be law for all religions recognize gay marriage, even if it is against their teachings.
The Law is considered above religious doctrine.