Thanks Gingernut - I didn't know the medical term so wasn't sure what to search on. You're right its been discussed many times but inconclusively, so I called the CAA who advised that any restriction would depend on the individual's specifics.
We've to send the NHS reports to the CAA - and hope that as the NHS don't regard her condition to be a problem and don't want to check up on her further, the CAA will see it the same way.
W