As an international student I have not been able to attend open days
in that case I think you should try to find vlogs of people who go there or look up “driving around ____.” Those are all very different vibes to spend the next 3 years: east London vs the midlands vs northern UK. but if it’s strictly about reputation, the British would say Durham then Warwick
I’ve heard that Durham isn’t that diverse and the town itself can get pretty boring but the collegiate structure really causes people to have community and love it anyway. Warwick seems like a step up from that; it’s a proper little English town and the campus is traditional/ what you would expect a university to be. And qmul is the most diverse and vibrant but more and more has been coming out from current students and graduates that mismanagement is making a good school not so good
It depends on what you prioritize; for example, I think Durham is the highest ranked out of all of them, but for you there might be other factors that also contribute to your decision. So maybe make a list of what you find the most important at a university and with that see which one has the most benefits.
As an international student I have not been able to attend open days
Look on YouTube - there will be Campus Tours and Open Day films.
All three Unis have a good academic reputation. Aside from 'course', these are the basics to consider : Warwick - modern concrete campus on a site miles outside Coventry - thats where you would be living in 2nd/3rdyear. QMUL- in London's East End, not the safest area of London, and London is an expensive place to live. Durham - old University in an old Cathedral city. 'College' system which some people find annoying
qmul is the highest ranked for law, 7th in the UK and T40 in the world. But its less prestigious overall than both warwick and durham. I'd say go with durham since its both a top uni overall and in law if you want to work big law. you can't really go wrong with what you choose.