I am rapidly losing any faith I may have had in the justice system.
But the point of Chronus' link is that this is
nothing to do with the British justice system. The UK government can do nothing except apply pressure to the Greeks to review the accident report, or to consider a wider range of evidence in any appeal.
That was exactly why I posed my question above - any engineers whose aircraft subsequently crash in Greece can presumably be dragged away on an EU arrest warrant and tried in the same fashion as Mr Irwin, while the UK government looks on impotently. I presume that airlines have considered that and are content with the legal basis of their engineering operations...