Unfortunately, the Rogers Hoyle appeal finding has changed things badly. Anyone giving evidence or making judgements as experts will always now be aware that their words will probably end up echoing in the places that the AAIB has always tried to to stay away from. There is a big difference between giving evidence to try to prevent an accident happening again without blame and finding your words in a litigation case. I suspect a single claim has changed the landscape at the expense of aviation and marine safety.