I went to Highland Airways, and I'm told the recruitment procedures are identical. It starts with a little introduction to the group, followed by a presentation. Then half of you get a McQuaig test whilst the other half get their licences checked. Then you swap places.
If you pass the personality/quick thinking tests, you will be invited to a personal interview. They asked what I'm good at, what I'm bad at, and then asked me an array of questions based on what I said I was bad at :-(
Unfortunately, I didn't pass this stage :-(