Worrying times!
The interesting thing about this case is that no matter what is in the AAIB report, they can be second guessed by Plod and his pals. The reason they don't investigate accidents in the first place is because they are not trained or equipped to do so. This is outside their area of expertise. At best they can ask a few so called experts, who have a different opinion to the AAIB, for their opinion. At worst, they can... the mind boggles. Remember, all The Filth want to do is nail you against the wall. They are certainly not interested in proving anyone's innocence.
The bottom line is if Plod win this one, the AAIB become the enemy. Why? Because anything they find can and will be used against you.
PM