Congrats on the interview Diddler.
It takes about an hour, normally with 2 people present...either you'll get a hr person and pilot/operations guy or you'll get 2 pilots to interview you.
Its very friendly and none of this good cop, bad cop rubbish you see.
If you have a person from HR present prepare to be grilled on your past...the likes of education, previous jobs, why this college/course etc etc.
If you have the 2 pilot panel you'll spend more time on tech questions.
Heres the questions I remember.......Brush up on the tech side of asym flight in a multi, 1 in60 rule, bit of met, why swept wings on a jet, know the numbers of the aircraft you did your IR in...Stall speeds, approach speeds, take-off speeds, how heavy is she, max weight etc....what voltage / frequency will you see on a modern jet.....
There wont be any surprises technically and if youve done JAA exams (which you probably have) there'll be nothing you havent come across before......
Hope this helps...when is your interview by the way ? and let us know how you get on..
Good luck....