I agree that keeping religion out of schools is a good idea. It doesn't look as though fundamentalist religion can be eradicated from the human mind so it's better to keep it confined to private life as much as possible.
That being said, I don't think the situation in England is directly comparable to the USA. There are parts of northern England (and sections of London) where the population is predominantly Muslim so if a school is going to have some days off for a religious holiday, it might as well be Eid as Xmas. The only problem is that while the Father Son and Holy Ghost died in the 19th century, Allah has yet to have a funeral.

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