My condolonces to his family and friends. What a terrible experience.
Isn't that the Slingsby Firefly? Let me add the caution that I never flew it, therefore my questions might have no validity on Pprune-among the many armchair experts.
The same trainer which caused a tragedy or two with the USAF Air Training Command, and was then rejected and replaced by the Pilatus T-6 "Texan" II ?
The Firefly supposedly had serious problems during spin recovery, unless my memory is fogged again late at night (not a Cat 3 memory, at best possibly RVR 1800 with bright ALSF).