It’s possible that those from recent years might be the subject of gagging orders. Surely any manager between Laws and Nelson (inclusive) will have tales to tell if able. (Maybe leave out those that would send the crowd to sleep before they got to the interesting bits. You know who I mean!)
There was the sense (during Laws’s bit at the Kevin Keegan event) that he was unable to talk about the Peter Swann years, so I suspect you are absolutely correct about NDAs being in place.
Turnbull only half-heartedly tried to draw Laws out on Swann, and it was obvious this was more Turnbull putting Laws on the spot to make him uncomfortable for a laugh between them.
It was also equally clear that there was plenty Laws could say about Swann but wouldn’t, or would say about Swann but couldn’t.