Hello! I can provide a bit of context. I applied for 3/5 of these for Game Art and I had a close friend who studied Illustration at UCA Farnham.
UCA Farnham is a tiny, tiny university ostrocised in the middle of the surrey countryside in a little village. It has a very small amount of student accommodation that can make getting accommodation on campus very difficult. The only places to go out, really, are a slew of local pubs also populated by elderly locals and the student union bar. It is a pretty atypical "student experience" although the village is very pretty and the courses are well-funded. I had a good experience interviewing there, but the classrooms were very small and I felt a bit reluctant moving there from the city I was living in prior. Recently they had Sex Education do some filming there and student work featured in the background of some of the shots, which is cool. It also neighbors Guildford, which is a larger town that also has a university (Surrey Uni), so some students choose to live there instead.
Falmouth I didn't attend an open day for in person as it was a long way from where I was living at the time, but I did attend an in person regional interview, where they sent out people from Falmouth to hold interviews at a building in Manchester and spoke to students and lecturers about the course. This initiative was really cool and gave me a much better understanding of the Uni than I otherwise would've gotten. I got some great feedback from my interviewing lecturer and everyone was really enthusiastic. They would've been my insurance pick had I not got an unconditional from my firm.
Norwich I applied to, but I also didn't attend an open day in person but one of my friends did. She reported that it felt a bit school-like and the way they conducted the in-person interviews was in a group setting, with lots of people showing their work at once, and she didn't receive much feedback, leading her to feel as though it was all a bit unprofessional. Equally, i've heard from people that did end up going to Norwich who found it to be a well-equipped course. It is a specialist arts university and has some better career links than alternatives. This is probably the most personal and least reliable info of the lot I can give you, so take with a grain of salt.
I don't know anything about the university, but I've spent a lot of time in Brighton and it's a really cool city with a large student/young people demographic, lots of things to do. Lanes full of vintage shops, record shops, the sorts of independent places that sell all kinds of trinkets. I imagine it's a really fun place to go to Uni.