Hamsterminator
Stage 1 = initial application, stage 2 = aptitude/assessment, stage 3 = interview! Correct me if I am wrong!
FTE and CTC doing stage 2 and 3 on same day, OAA on separate days.
If you get through stage 1, you are invited to stage 2.
If you get through stage 2, you are then invited to stage 3.
If you get through stage 3 (the FTO thinks you are suitable for the BA scheme), your details are passed to BA.
They will then decide who is to be invited to the next stage.
Simples!!