I applied for a job there back in 2003. The whole selection process was relatively enjoyable and the psychometric testing was spookily accurate (although it didn't tell me anything I hadn't already learned from previous testing in other jobs).
I had to give a 20 minute Powerpoint presentation to 5 training captains and then they went straight into interviewing me! The interview was quite searching and I found that they were asking questions that made it clear that they'd seen the results opf the psychometric testing - so listen carefully to the debrief from the psychologist-type chap because it may help you to prepare for the interview.
There were 4 of us up for two posts as Flight Crew Technical Instructors - the jobs went to the two blokes who were presently unemployed and could start immediately, rather than the two with 3 month notice periods. I don't know if they were the best candidates or just the quickest to get!