All depends on one's age and where you worked - Part A was seen on all active MOD sites that had 3rd party visitors on a regular basis. First para in part B is common sense - one did not want photographic evidence of what was being tested leaked to the Enemy. Unauthorised radio equipment could have buggered up the control signals and drugged and drunk staff do not mix well with live detonators and Torpex! The second para was a sign of the times and similar could be seen displayed on many factory entrances, not just Government establishments. Betting and gambling was very much frowned upon - still went on all the same, but you had been warned!
torpedo testing station by Peter Bardsley, on Flickr
torpedo testing station by Peter Bardsley, on Flickr
Noticeboard by Peter Bardsley, on Flickr
torpedo testing station by Peter Bardsley, on Flickr
torpedo testing station by Peter Bardsley, on Flickr
torpedo testing station by Peter Bardsley, on Flickr
suits the fisheye...did you go diving around there too
