Right, I like a challenge so I have done more digging. Interestingly, a day later a bunch of Ospreys did a night ‘exercise’ at Burn airfield. So not a million miles away and odd to pick a gliding airfield when so many active military ones are around. And how does this link to the R44 and disappearing pilot? Perhaps a reconnaissance run by a secret squirrel person? Someone more used to flying an Osprey and they forgot to pull carb heat? So they clear off out of both secrecy and embarrassment.