What a fascinating project to work on.
I've had the dubious privilege of working with David King and several of his colleagues on a number of investigations. (Dubious because of the nature of the work, and no reflection upon them). A very competent bunch.
DK taught me a useful lesson in the reason behind air accident investigation a few years ago in a meeting at Farnborough. We were discussing the causes behind a particular fatal accident in some depth, when he paused the meeting without warning, saying "sorry guys, we're getting too close to blaming somebody here, let's take a break".
G