It was reported today by Ed Trimble, of the AAIB that no fault was found that caused the aircraft to crash, this aircraft was not fitted with a flight recorder,
The likelihood of it being pilot error is looking ever real, the manoeuvre was started at too low an altitude.... circa 500 feet too low.
The pilot probably blacked out during the pull up, ( this is caused by the force of gravity draining blood from the brain, leading to unconsciousness) the opposite occurs at the top of an extreme manoeuvre, this is known as a (red out) the blood rushes to the brain, again causing possible unconsciousness.
Possible his G suit was at fault, I'm sure the answer will be found when he is brought out of his induced coma.
Wotan