Did you go inside at Derwent? We walked into the control room and the TV was on with no sign of whoever was watching it.
No, I wouldn't mind a nosey in there to be honest, but from a reccie about a year ago we were aware that security are based around there, probably in that building, so we gave that one a miss. After reading about your 'adventure' there, I'm glad we didn't try - a repeat of that isn't something I'd have liked!