While the discussion of the relative merits of the various Boeing and Racal reports is interesting, surely anyone remotely interested should be asking this question – as the aircraft’s Nav and Comms Systems (in their entirety) only had Switch On Clearance, why was it being flown in the first place?
In the context of clearing the pilots, tease that one out and watch senior MoD staffs squirm. So why the reluctance to “go there”?