The Stop Butts behind 4 and 93 Squadron's hangar, deep in the woods - May 1960.   There was a special stand for mounting and test firing a 30mm Aden cannon.   On the few occasions we did fire it, the noise was deafening (and frightening).   Downside to this was that we had to 'de-lead' the butts.  Still a nice change on a sunny day!   (Thanks to John Mackenzie)