Just been in the UK for a holiday and managed to catch up with a few pilot friends - seems like bouyant times.
One tip though after reading this thread and talking to some friends who have recently been through process - some BA tests are the same as Qantas.
You should think about taking a trip to Melbourne and doing the PATS course - which prepares people for this tests. At J* we sit the same test as Qantas applicants and the majority of FOs I fly with tell me they did this course and that is the only reason they made. Certainly I would have toast without this program.