Hi Jayjay
As we do not know your daughter or how her condition affects her , we cannot offer an opinion. What I would say is to do a day diary for a week on how your daughter's condition affects her.
You can also write a supporting on what additional care you give your daughter and why.
I would advise you to seek help from your local Welfare Rights organisation who will be able to take into account her circumstances;
advicelocal.uk Gary