Knole Academy itself says that it’s responding to changing mores. “We review our school rules on a regular basis and make amendments when changes in society make a previous standpoint redundant or untenable,” the letter went on to say. But it has been accused by parents of lacking the backbone to enforce stricter uniform rules. One mother was reported as saying: “We’re a society being run by children… Rules are rules and that’s the end of it.” Other schools have come across similar problems when enforcing dress codes. An avowedly feminist girls’ school in north London tried to suggest that,…