Hi SMP
Hope all goes well with your Mum
Just a little more info for your mum to access or even you and your husband. Try D.I.A.L a charity that helps people with disabilities, they give advice on all welfare benefits and are extremely helpful in getting AA (as it can be a lengthy form to complete on your own)
http://www.dialuk.info/
Also the Citizens Advice Bureau, they can also give you extensive information if you want it.
http://www.citizensadvice.org.uk/
Both are free and they have advisors that can home visit.
Cheers