Well Done Jonny-boy
I left my interview thinking Oh God what have I done
PARC send you a letter first saying congrats etc. Do nothing at this stage.
AL recruitment then send you a letter telling you to get in touch to arrange a date.
Format for the third stage is from one of the ladies coducting it. The interview is with a pilot only apparently, There is a Psyc assessment which is pretty deep as you say
Critical Thinking is the same kind of thing as the BA cadet aptitude CT test. Buy a GMAT book with some examples to practise.