I think if there is any legal hand-rubbing to be done, it will centre on the organisation and supervision of air displays.
The latest bulletin highlights an embarrassing issue regarding airworthiness oversight. Perhaps the CAA needs to take a close look at itself and the manner in which it continues to audit. Legal wrangling? I think not, unless there is a definite airworthiness related causal issue still to be found in the pile of twisted metal.