Why is it the CAA have only 2 modes of action - do nothing or prosecute?
Surely all it needs is for the CAA to ring up Mr Dobson and mention that there's been a complaint backed up with a bit of evidence and although it isn't sufficient to justify a prosecution they'd appreciate it if he'd stick to the rules in future. I'm sure if he had been bending the rules at all he'd be considerably more careful in future. I'm also sure he'd be more cautious about regular practice wherever the complaint originated. Safety enhanced, complainant happy, cost of one phone call, and should the CAA ever wish to prosecute in the future at least they can say he'd previously been warned.