They said I pretty much had to start in November but if you have a good reason for not starting then pretty sure they're ok with that. I didn't have a good reason other than having more time to sort things out.
Sat stage 3 last Friday the 1st but I only heard back so quickly as they're trying to fill the November course. They told me at stage 3 that replies are being sent within 30 working days at the minute. They have had 20,000 applicants since September so are a bit overrun at the minute, don't be too worried if it takes them a while to get back to you.