Oh I see. Yes the GP involvement makes all the difference. Thanks for clarifying. I hope your son gets the result he needs and is spared more stress.
Thanks BIS I will ask a friend to call and check which category I am in. I think all people applying for disability benefits must be vulnerable. I wonder how the "Vulnerable" category came about and what it covers?
I have attached a link which is an answer to a freedom of information request about the DWP's definition of vulnerability. Whether or not they follow their own guidelines is another thing.