Oh its grossly unfair and is certainly an 'illegal deduction from earnings' as outlined in several Acts of Parliament. However, its not worth (financially) making a fuss about in itself so I've let it lie.
The *really* worrying thing is that all my fellow instructors have seen what has happened and have resolved not to expose themselves to the risk of unemployment/financial penalty. The result being we now have an ingrained culture of cover up. This is madness for all of us and for the owner.
The allures of a nice big professional outfit where I am not expected to fly 7 (yes 7) slots a day (1 hours slots no less) 5 days a week are growing ever more compelling...
Stay safe, WWW