We were getting 1600 people a month coming to see Concorde's undergoing maint. During the mod. programme outside visits were stopped and staff visits curtailed.
We do get staff now when we OK it, to be honest it's the staff who often caused problems, external visitors were in an unfamilar eviroment and knew it, so listened to safety briefs and generally did as they were told.
But you'd get staff, who were not frontline, who thought they owned the place, doing stuff like trying to step on to the wings, not being aware of all the switches in the cramped flightdeck etc.
Now all visitors to the BA hangars have to be escorted. In Concorde, we did that anyway, I did, and still do, a lot of that.
It's good when you get people genuinely thrilled to be there, asking questions and generally enjoying themselves. For new staff, a visit to Concorde seems to be essential, as it was for me all those years ago!
But here's some questions I've been asked by new staff, always from the non-operational areas;
Sitting it the flight deck, all systems powered up- 'Is this a real aircraft?'
After explaining the 6-9 inch expansion of the fuselage in supercruise- 'What? The people expand?'
Hopefully, external visits will be reinstated soon, I've a list of friends who want to come in! In the past we've limited these to 20 per day to avoid disruption.