What were those visits that our lovely Russian friends used to make to our shores called? The ones that seem to require any door over a certain size to have a little yellow sticker on it which denoted the doors they were allowed to have a look inside?
I remember them visiting RAF Locking many years ago when I was fresh from the stacker farm. They must have been in awe at the knackered old radars they used for training and the every-so-impressive Gnat on a stick by the front gate.