I admire your tenacity in researching this airfield!
29th Sept: (‘flight’)At the Bedford School of Flying very good weather has been experienced and two members flew to Lausanne. Among the C.A.G. members four " A " licences have been obtained since September 1 by Messrs. G. W. Dicker, W. L. Stoddon, C. R. Tapper, and J. S. Sproule. The latter is, of course, co-holder of the British two seater glider endurance record.
I was intrigued to see my Dads name J.S.Sproule in your post. Dad got his A License (PPL) at Barton in an Avro Avian.
He did most of his flying in Aeronca G-ADYS and wrote about it in an article called "Shoe String saga" which was first published in 1970 in Pilot magazine, it was re-published in Tail ends of the Fifties compiled by Peter Campbell
If you want to see the glider and the pilots look at this clip towards the end where they are flying from nearby Dunstable
I wish you well with your research and hope you find some value in the scraps of info I have sent you.
KEY AERO AVIATION NEWS