Very experienced pilot, but how many hours on a Hunter or similar types.
Do not suppose he does much aerobatics in his day job.
He has been flying the Hunter for some years, flys the Jet Provost, flies and displays his own RV8. Was an Air Force QFI and flew the Harrier. He has a vast amount of display experience.
His experience and ability is obvious to anybody who has flown with him in any of those aircraft and also in his commercial role. He is also a modest and thoroughly decent individual.
Speculation about the cause of the accident is as pointless as it is distressing for anybody affected by this dreadful accident.