PPrune Radar,
7000 isn't a squawk normally used by UK military aircraft. Although it is some time since I retired from the rotary service in question, I recall that 4321 or 4322 would have been more appropriate for such a flight.
Something else that has not been paid too much attention to is the co-pilot's intercom box being found selected to the "Emergency" position in the wreckage.
But all this speculation is really irrelevant. We all know that the verdict shouldn't have been brought and the HOL and Scottish inquiries support that view.
This will probably not be resolved by MOD until a certain VSO retires, in order not to upset the status quo applecart within.