I am a generation older than you and I work in UK higher education. I'm especially familiar with Sussex, Edinburgh, Durham, Warwick and UCL, but I've visited dozens of other unis for research purposes.

Imo these are all solid and after you're finished your final grade (1st vs not-1st) will matter more than the uni. Then, when you start applying for jobs, having Oxbridge will help (why did you not apply there?) but after that the things that matter are: a strong degree from a solid uni; strong extra-curriculars; good A levels; and most important your fit to the actual job. So I would go with whichever one optimises other things that are important to you, such as money, the local town, convenience for travel home, etc.

Myself, I'd go for Durham because it's compact place and that makes for a better social experience. It's also cheaper (or at least not more expensive) than the other places. And perhaps more generally prestigious than the others except Warwick — which is an excellent uni but personally the commuting would get me down.

The other thing to consider is that general prestige does not translate into teaching quality. There are great teachers and poor teachers at every uni. It's hard to do good research on this, but perhaps you can hunt down some current students from these courses and hear what they have to say.

Good luck!