Langley, long time no speak. Hope all is well with you
In simple terms, any culpability is for legal investigators to determine. It is not the remit of the AAIB and even less so of some armchair experts here who seem happy to assume they know more about the events than the AAIB team.
From what I've seen in the various reports, there is too much stated doubt in the report at this stage to draw any legal conclusions. Despite the will of the people.