Hi - I've just been given my start date too at Snow Hill, subject to medical, on 9th August. I assume you could be on same course. If so, congrats to you on getting this far!!
I've read a bit about shift patterns on various threads. I know it's a basic Mon-Fri to start with on the initial training, but once we get buddied up for operational work there's an average 35 hours but the shift patterns seem to be quite complex and I think are rostered quite a way in advance to include some Sundays (which will fall outside of the 35 hours). I know this is fairly non-specific but I'm in the same boat, and am just really thrilled at the prospect of getting into this new career, as I'm sure you are.
Good luck with everything