When teachers are no longer in charge

I was staggered by this report of the girl who wanted to be able to wear a full length jilbab to school rather than the shalwar kameez, on the wearing of which she had happily co-existed with the school authorities, and who won her appeal. I can accept it may be difficult for her religiously, but at the end of the day it is surely up to schools to set their own uniform codes, no? This may offend some people, but I do not see that giving people rights above that of a school to set its own reasonable uniform rules is either called for, necessary or sensible. Yet another reason to give people a choice of schools, and, sadly, another example of the problems of integrating established British principles (good or bad) with an increasingly self-confident Muslim population.