Hi Chrissy,
Yes, it should be fine to send in the photocopy, we always advise keeping hold of the original anyway.
It is impossible to guess to which group, if any, you might be allocated. It will depend on how you have answered the questions, what other evidence you have supplied and, unfortunately, on the assessor on the day.
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
