Wait, is this really a problem in the UK?

To nothing like the extent it appears to be (at this distance) in places like Kansas, no. But there were certainly 'creationist academies' established when all the rules were changed: I have little idea if they have thrived or not, or how many more have opened since. I am sure google searches would help.

There was also a case last summer of a school which had submitted students for a biology course but had not taught them evolution. Naturally, they were unable to answer the questions. The schools protested and the examining board declared they would ensure the pupils were not disadvantaged in the results by this. To my mind, that's completely wrong. The school had disadvantaged them, it was not up to the examining board to disguise the fact.

However, it is all part of a much wider question: to what extent should holy books, of whatever religious body, override the rest of society? And there are precious few parts of the world where that isn't an important question.