~24 hours have elapsed, it is the Kirby Kite, the radar trials story is fascinating and what prompted the challenge. Plus, what thing of beauty:
The gentleman in the CUGC Kirby Kite is a Mr. Slazenger taken in the 30's. I had the honour to be awarded the CUGC Slazenger trophy many decades later for early cross-country prowess.
India42 has control.