An argument over French v English Law is the last thing I want to see here. This 'charge', I think should be looked at with an eye toward discovery, rather than "Culpability".
The ultimate responsibility lies with the carrier, and the manufacturer.
My opinion from the outset is that BEA has invited this sorry situation with its arrogant, flimsy, and parochial attitudes, expressed in its public disclosures, and an unwillingness to simply pursue the truth of the matter.
A long discussion of arcane and unpopular minutiae has come and gone. The Families know the depth of studied nonchalance exhibited by the principals, and their thinly disguised agendas.
The Pilots acted, the Families have acted, Now the Law. Inevitable.
Alucia. Bon chance.