I will preface this by saying I am not from the UK and never attended a school with a uniform. I was a teacher in the UK for a while, and there was a uniform in those schools.
Why is there a rule about how children can style their hair? I genuinely don't see how it affects learning in any way. Is it a rule for rule's sake? If so, why aren't parents saying that the rule is outdated and should be abolished? What am I missing here?