I think perhaps the main point is being missed. An investigation is awaited into the deaths (as distinct from an Inquiry into cause of the accident), and I believe we await the first Fatal Accident Inquiry into Service deaths in Scotland. DV will correct me if there's been one in the last couple of years since he had the law changed. While I can't speak for them, I do know some families think the same.
Nothing since the law was changed. In fact the revised FAI act will have issues because it has been link with 'active service' in Scotland, and I do not know of any.
DV