Surely there are various agencies with an interest in discovering the truth. BAA own the airport. If an illeagal act occured on their turf, surely they have some jurisdiction. Likewise the UK CAA who have jurisdiction over users of the airspace for which it is responsible. NATS are probably without jurisdiction in this. How can the whole matter be monopolised by the IAA, even if it was only, perhaps, EI reg a/c involved?