Hmmmm..
Some interesting posts here.
I have been LHS in a B757 operation at LGW for some ten years now, and the only non company fam. riders I have ever had in all that time have been from the West Sussex Police Anti Terrorist squad, from the Gatwick Airport Station!
I would love the oportunity to entertain some ATCO's on the flight deck. The system does allow for it, I'm sure. A formal approach to any company DFO would bring a result, just ask.