and only Owls and Witches should fly in the middle of night, Right ?
No, of course not.

But taking into account the briefing time prior to the flight and some time for getting to work from home, that might explain the 'fatigue' factor.
My intention was just to point that out. Excluding fatigue as a contributing factor right away seems too easy to me - even if the flight time is rather short for 'long range' flight.
We will all find out, when the final report is released...
Regards,
DBate