You or rather he needs to look at several aspects and he may find it narrows down very quickly. It did for my DC and they both did subjects that are widely offered.
Obviously the course is a big factor and he should consider methods of assessment, modules offered, facilities. Also does he want a placement year? Which unis have success with these?
Rankings – look at lots of lists as no one list is "correct" – consider if they are based on employer views or student satisfaction.
PGs - this is a biggie – what is he actually likely to get and where will it take him? If he will get AAA then he probably doesn't need to look at Lincoln or Kent. But if he is more of a BBC kind of student then he might consider Leicester or NTU or Sheffield Hallam or Leeds Beckett or Man Met.
Then consider:
Campus or city-based?
Big city campus (Nottingham) or small town (Aber, lboro)?
Close to home or really not or midway?
A new area he doesn't know or familiar territory?
Sports - is he sporty? Where is big for his sports? (I only know the answer to that for a few sports but it would be easy to find out)
Music? does he play and where has lots of ensembles? Does he like gigs and need to be in or near a big big city?
London???
Scotland? N Ireland?
It seems to me that someone who would enjoy Birmingham or Leeds or Newcastle or Manchester would probably not love it at Warwick or Lboro or Aberystwyth or Lancaster or Bath. If you want to be at uni in London, I doubt if you would enjoy Edge Hill.
<reads thread> I see others have said much the same.
A good further point is accommodation actually. I do bang on about this but uni is becoming more and more £££ and excluding less well off. The threshold for the minimum loan is now so low (as you will be aware @OuiOuiMonAmi ) that just about any family with two parents working will be past it. So I think how much is the accommodation is a good question. Some unis have halls starting from about £100 pw (Leicester, Lboro, Brum) or around £150 (Newcastle, Sheffield) but some have only or mainly catered halls or en-suite rooms that are £££. If this is not a factor of course then happy days.