Have you tried to contact anyone at the Central Air Traffic Control School (CATCS) at RAF Shawbury?
As well as the thousands of pictures dating back to the start of ATC (started by pilots actually) I'm sure they have an abundance of ATC history. In fact whilst a student I remmeber seeing a somewhat dated CATCS video which started off with what happened in WW2 and the origins of ATC. It appeared to be voiced over by Harry Enfield's Mr Cholmondeley-Warner!
Maybe a current CATCS instructor can shed some light on this forum.
http://www.shawbury.raf.mod.uk/catcs.html
The above link to the station website only starts post 1950 but it's a start.
Hope it helps.
