Jackie
I am afraid there is no clear procedure for a Paper Based Review, the primary requirement for a PBR is that there is sufficient information available for the assessor to make a recommendation to the DWP, however, this needs to be modified by the risk of harm to the claimant.
I'm afraid you will have to wait and see what happens and then take appropriate action if you need to.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems