Just This Once
Excellent post. If anything, you've been too kind to BoIs/SIs. Pprune is full of examples of incompetence and maladministration in the conduct of inquiries. One of the worst was failing to even comment on there being no safety case for the Hawk seat; and by definition the aircraft case being contaminated. On Sea King ASaC (2003), an investigation was halted altogether when the truth emerged; MoD now deny it even took place. Going back further, the truth behind Chinook ZA721 30 years ago only emerged last year; a completely different version to the official report, giving weight to the evidence, given under oath, of the BoI being directed. Frankly, I'd take any SI report with a huge pinch of salt.
It will be interesting to see how MoD deals with the (alleged) offences by the Voyager SI member.