Not Exeter - its miles from anywhere, - its only plus point is one new-ish student-hub building, and surf beaches.
Edinburgh - Common Law? Remember that Scottish Law is different.
Leeds or Bristol - good sensible Unis, interesting cities.
Look at 'extras' - any study abroad opportunities, placements, Moot Court, Law Clinic etc etc.
Then look for campus tour films on YouTube, and tourist films for the city.