At long last people are catching on to what I've been saying all along. Low level display aerobatics in Fast Jets should be carried out by current, well funded professional aircrew. Would a serving RAF pilot be authorised to display with virtually no recent practice time? If you can't do it properly, don't do it at all or this happens and Gnats happen and Vampires happen etc etc.
The pilot was doing his best and the CAA should not have allowed him to continue with this "accident waiting to happen". AH was not superman. Neither are any of the others who jump from one type to the other. Test pilots do that and take a very long course to make sure they do it safely. They do not jump into an unfamiliar Fast Jet and do aerobatics based at 200' (or even 500') in front of thousands of people ( including me and my grandkids) without putting themselves and the rest of us at significant risk.
Stop this if you can't do it properly.
This, surely, must be the basic conclusion after such an appalling disaster