My friend has a DLA appeal soon and is not capable of speaking for/representing himself. Is there an organisation that could provide someone for him?

Get in touch with your local C.A.B they may be able to help. There are organisations that work and advocate for people in particular area's or with people who have particular difficulties. If the C.A.B can't help you they will be able to put you in touch with one of these organisations.

My daughter used someone via the CAB which operates from Michael Carlisle Centre at Nether Edge Hospital. Im sorry I dont have a contact number. She won.

With the CAB they cover very strict areas for each centre, so you'll have to go to whichever centre covers your area. Look them up online and I'm sure you'll find the centre you need.

I found the CAB very helpful in knowing what to do and when and in interpreting exactly which reasons each letter is referring to, which didn't seem obvious to me as an individual.