On the "pilot error" issue , if I could clarify: I agree that the AAIB will indeed establish the cause of the crash. However where I do feel that his responsibility lies is on the positioning of the aircraft. He should not have been over the A27. That may of course not have been deliberate but I would argue that it was certainly an error.
So you have clarified nothing other than your opinion, you simply know nothing about what happened from inside the cockpit.
Many airports have major roads just outside the fence. 20-odd years ago a Citation went off the end of Southampton's runway 20 and onto the M27.
On Radio Solent this morning an ex AAIB inspector suggested that perhaps there should be hatched areas for the approach to 02 (and possibly as a runoff from 20) and traffic lights so that when there was a movement the M27 could stop to allow the movement to take place.
That really did seem to be a knee jerk reaction.