That is, or was, a CFM Shadow. There are quite a number of those, and a specialist flying school using them based at Old Sarum, including a charity using one or more Shadows for disabled flying.
The colour scheme is slightly unusual but would match several aeroplanes I've seen down there.
As distressing as these things always are.
The type has a good safety record, although not flawless. There have been a number of engine failures over the years, an issue which got resolved with elevator flutter, and another issue which was also resolved with undercarriage cracking. All of those sound very much like red-herrings however given that the photograph seems to show something that was probably intact prior to hitting the ground at high speed. The cockpit is very good with regards to energy absorption, but clearly wasn't good enough in this instance.
G