I'd just like to emphasise that no favours have been done, all but the loose cannon doing the job they are paid to do. Having worked with these people in industry since long before they went to the "dark side" just makes communication easier. It didn't make any difference to the way they handled the situation or the outcome. Any other person in my position would be able to contact these same people for the same reason.
The loose cannon was very rapidly secured once he had said he was going to arrange a level two surveillance - something he had no absolutely power to do. How strongly secured remains to be seen but he would be a brave man to take me on again. He has put enough things in writing to make the job of the Industry Complaints Commisioner pretty straightforward.