There you go. School shooting to take place in Britain 20 years from now.
Now any sentence that doesn't condemn these women to fight each other with hairsprays, magazines and whatever else untill the judges find that they've had enough, and this enough is at least as long as the toddlers fought plus time proportional to the adults increased size, age and strength, is a too light sentence.
Now there isn't anything wrong in "toughening them up" indeed but what they did is not even close to how that's done, beginning by ridiculously improper age. Lame pretext to hide their sadism.