I write having done long stints as both an Admissions Tutor and a member of Mitigating Circumstances panels, to which ND students make a high share of appeals.
He’ll be at least 18. I think he has to try.
You have some good advice above. The main thing, I think, is to keep his expectations realistic. That can mean many different things academically for ND DC, so I won’t presume to give specific advice. In particular I wouldn’t want to limit him. But he needs to know the importance of having a very safe Insurance Choice of uni. Also, and you will be able to assess this better than me for your DS, a number of our ND students struggle a great deal in Y1 particularly if they are living away for the first time. Some unis have Quiet Halls and other ways of accommodating ND students, so you might want to look into that. Will he do best in a private room with en suite? He won’t have that option everywhere.
It will be very, very helpful for him to register with the Office for Students with Disabilities (whatever it is called) in addition to the DSA. This office supports students and, importantly, at my uni sends a rep to each Mitigating Circumstances panel to make sure their students are being treated properly. They are excellent advocates.
Often students are in denial and want a fresh start at uni, all very understandable. But they morph this into ‘it isn’t fair for me to take extra resources’ or listen to so called friends who tell them this. Nonsense.
If he gets the requisite AL grades and can manage his anxieties, he has every chance of succeeding. Usually with ND students the anxieties are the trickiest bit. Good luck to all of you.