Despite not making the grade myself, I hope you accept my humble opinion/knowledge.
I did ask one of the assessors at OAA (who happened to be a BA pilot) about the type-rating element of the FPP; I was told that any new pilot comencing a type rating with BA is officially an employee. You may therefore assume that if you do indeed start the type-rating element, it is day one of your official new career with British Airways.
Whether you're temporarily made (due to economic reasons) a flight attendant after this is another matter.
Obviously you guys need to get that confirmed, but I would assume that would include a British Airways salary during this type-rating training period.
Good luck and best wishes guys.