Topuniversities.com regards Nottingham University as the 95th best place in the world for Law and Exeter University as somewhere between the 201-250th best place for Law.
If Nottingham University didn't have an attractive campus or some attractive accommodation, I wouldn't let rankings so much sway me, but it is generally regarded as attractive.
Graduate prospects are deemed only slightly higher at Exeter for Law students in general so, considering the 30% Exeter v 18% Nottingham private school difference, Nottingham is almost certainly technically batting above Exeter in terms of added prestige compared to where each student on average originally came from. The percentage of Law graduates currently doing something related to what they wanted to do is identical at each place.
Lastly, edurank regards Nottingham University as the 10th best in the UK (12th best in Europe, 62nd in the world) for Law and it regards Exeter as 23rd in the UK (37th best in Europe, 136th in the world) for Law.