Hi Debbie
If you want to get a copy of the assessment report you can ring and ask for it.
There is currently nothing for you to tell the DWP. A person is still entitled to PIP even if they have hearing aids. When he has them he will be able to judge what difference they make to him, and if you have the PIP decision you can look to see if that would make any difference to any award he is offered.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems