mattcarus. Got it in one. It should have been sorted yonks ago.. and the "sticky" on PPrune quoting ofcom shows what a mess it is. For ofcom to suggest that because air show organisers publish frequencies that can be taken as authority to listen in is simply ludicrous. Personally, I have no objection to someone listening to ATC so long as they use the information sensibly. Unfortunately, experience shows that there will always be the loony who spouts off about something he hears..