Hi Jennie
I cannot answer your question as you have stated what components of DLA your husband was awarded.
If your husband was awarded no mobility or low rate mobility then you may want to think about applying for a change of circumstances before he reaches state pension age if his condition has deteriorated.
If your husband has been awarded high rate care and mobility then you may want to do nothing.
You should seek advice from your local Welfare Rights Organisation before you do anything.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems