Manky_Monarch first things first RELAX
We (Monarch) do take OBs flights fairly seriously but it will normally be with a normal crew and no trainers! It's your chance to get to grips with everything but without being vital (i.e. you will be supernumarary and not part of the "legal" crew).
Be proactive, offer to help, and don't feel stupid or like a little lost lamb, it's natuaral to feel very out of place, esp when things are done differently to the classroom!
You (hopefully) will be offered a take off/landing or both from the flight deck jumpseat, make the most of the offer!
I'm guessing that you are going to EDI? If you want any more info drop me a line (privately) and I'll be happy to help.
Regards