that ... does NOT change the actual real world legal position that they are allowed, whether pupils are present or not, given the proper circumstances of reason and need.
It seems, then, that I will be allowed to continue my extracurricular bushcraft activity. Although the law is necessarily strict, it does seem to recognise the use of knives for 'educational purposes' on school premises. Since the Moras are locked away whilst not in use and only ever get used under my strict supervision, it seems that I should be O.K. legally despite some of the worrying absolutism expressed. Still, it is always useful to be reminded of the minefield that surrounds the whole subject of knives.