Bill Semple sat next to me on Heathrow GMC one day. Naturally, I offered him the chance to talk to a few aircraft.... but he politely declined! That video he "starred" in which we were all forced to watch was pretty dreadful. If you meet Marty Swann ask him about Bill....
I still have the list of staff featured in The Book and it shows Keith Williams reaching DATO(NATS) but not CNATS.
Thanks everyone for the input.