Upavon USL's
I can confirm that the underslung loads were kept outside of the peri track on the south side of the airfield.
Running a week gliding course I was informed by one of the staff that there was a bit of a hole in the grass just off our run. On going to look it was about 2ft deep and 10ft diameter. We were told a helicopter, type unknown, had suffered an engine failure as it lifted the load and had jettisoned it the previous night. Someone else must have picked it up and put it back in its usual place as it was no longer on the airfield. A very impressive hole!
ACW