Cgb:-
Err, can anyone prove that (lack of) airworthiness caused the Mull crash? Thought not.
No, and
AFAIK no-one has ever claimed that because
no-one has ever proved what caused the Mull crash, least of all of course the RO's. What has been proved was that whatever caused the crash it was an Airworthiness Related Accident because the aircraft, along with all its sister Mk2's at the time, was released into RAF service in a
knowingly Grossly Unairworthy Condition under an illegal RTS.
If airworthiness had been accorded a higher priority, indeed any priority, by those fighting the RO's Grossly Unjust Finding then not only might it have been reversed years earlier but the malevolent attack by VSOs on UK Military Air Safety might also have been revealed years earlier.
So much water, so many bridges...