I wonder just what it does take to get a school closed down. Or, for that matter, is it right to actually close a school down? You could have a perfectly good person owning the business and a rogue instructor who does his dodgy stuff outside of anyone's view so the owner has only got rumour to go on. I've seen very dodgy instructors (the sort who do fully developed spins on a trial lesson, coming back with white-faced passengers) stay for years.
I am aware that my comments here are often negative but I've seen so many dodgy practices (poor record-keeping of fuel tank content being just one recently-topical example) that if one was do get strict, more than half of schools would close tomorrow.