Moonwalker at post 175 raises perhaps the most interesting question I have seen so far on here.
What time did they commence their duty, and how was their work pattern in the hours and days leading up to yesterday morning?
You seem to imply you know the answer Moonwalker?
i have been told that the a/c flew from edi to inv as a mail flt on behalf of loganair after 1 of theirs went tech and then possitioned to belfast. would have left inv after 03:30.