FOK - sorry to hear about the PFO. I'm expecting mine soon. The numerical reasoning was very tricky. I suspect it'll by my downfall too.
The thing is most currently working will need to be assessed, go through the process and get an offer. They'd then need to give their current employer three months notice (that's what I would have to give anyway). Then 2 months at least for the TR then a month or two for line training. By which point the summer will be over so I can only imagine those who are successful will be for summer 2017.