What a tragic loss of life - sincere condolences to all concerned.
Although it is easy to jump to conclusions the information above would appear to suggest that this was a CFIT accident. I was flying a bit further Southwest yesterday before and after the accident and the air was far from smooth, perhaps turbulence in cloud may have also been a contributing factor. All the more tragic if this was the case since routing to the West via Glouocester would most likely have been free of mist shrouded hilltops.
Did this gazelle have an autopilot or stability augmentation system of any sort?
Anyone know if there was any kind of terrain avoidance kit fitted, even a colour moving map GPS with terrain?
RIP
Scooter Boy