Walter Kennedy:
There was a record of the engine state, a/c orientation, and track all of which more strongly suggested steady flight until the last minute evasive manoeuvre
You've lost me there Walter. What record? I thought that the whole problem with this accident is that there was no record (ie ADR or CVR) and no witnesses to it. What record do you mean? If you are referring to the SuperTANS "postmortem" that was surely no record, more the absence of anything showing out of the ordinary in the very limited evidence available from it. If you refer to the engine remains as showing stable paired power output, again not a record other than the state at the moment of impact.