But as always there were exceptions. The key one being where RAF Chipmunks operated from airfields where the control tower operated on VHF.
When I joined UBAS in 67, the Chipmunks still had VHF radios. Shawbury in those days was not infested with helicopters, which were still at Tern Hill.
Well over 90% of the movements were our Chipmunks plus Marshall's Vampires and Piston Provosts, which provided aircraft for the baby controllers to practice on. We all operated on VHF, so apart from the occasional practice diversion by Gnats or Hunters from Valley, everyone was fully aware of what was going on.
Then in 68, after the summer break, we came back to re-painted Chipmunks ( the light grey with white canopies scheme ) with new UHF radios and therefore our situational awareness dropped dramatically!
Coff,
I remember that the UHF switch box had a position for homing (I can't remember the exact terminology), but it was not used. Why was that there? Was there a plan for some future equipment?