Well, I'm not an aerobatic pilot, or ex-RAF but I don't think you have to be either to see what's going on here.
That roll in the JP was poorly flown, but luckily he got away with it. Luckily for the spectators in particular.....
The manoeuvre in the Hunter looks about the same deal- Again, not well flown, but unfortunately a poorer outcome.
Maybe the AAIB will turn up some mitigating factor (s), but this pilot doubts it.
Just my opinion, of course.