G0ULI --
You are grasping at straws pursuing this as a possible reason for the accident.
My dad, who flew right through the fifties and sixties, said the conclusion of every AAIB was written before the inspectors arrived. Pilot error. So when everyone gangs up against a highly experienced and respected pilot I like to consider the alternatives.
I've contributed all I can to the discussion here but will follow the case with interest and concern.