Hey there,
Check
here for another thread on the life of junior FO's on B777.
More roster examples would be appreciated though!
Starting in September, I can confirm you will be paid basic pay (something like 2700£ net) during ground course and SIM. Total time: 6 weeks.
After that: line training with allowances being paid.
Ba does provide a small B & B list, but that's it: you'll have to find your own accomodation by yourself.
let the games begin!