Having read the last few posts, for the interested bystander it is little difficult to see where this is heading?
Is the aim to try and ascertain beyond reasonable doubt the exact cause of the accident. I would suggest...no chance, the evidence is not available nor will it ever be. And what purpose would that serve anyway? The aircraft is out of service.
Is it to prove that military style airwothiness procedures were all ****ed up? I thought that had been proved and acknowledged already? I'll leave it to others to get all worked up about the effectiveness of otherwise of the new system...not my ball park. (Aside than to mention that airworthiness is a cost and the greater the cost, the less aircraft we can afford. That's not an argument to cut corners; that's an argument to risk manage in a cost effective manner).
Is it to prove the HC enquiry was a farce? Again, most interested parties, on all sides of the divide, decided that the day after the thing was released.
If it is to dig up dirt leading to a proper public enquiry as to why the UK no longer has an LRMPA capability, then full steam ahead and more power to your elbow. But I think you are wasting your time because it is not going to happen.