Cambridge and Brighton are perhaps the next most famous cities in the UK for their LGBT communities and such. Cambridge is the 'gayest' campus city in the UK, if not Europe!
I’ve never heard of Cambridge being a gay city, ever. I went there several years back and couldn’t even find a gay bar, although this may have changed. There was more to do growing up in Southend! I really don’t know anyone who would put Cambridge up there. London, Brighton, Manchester, Liverpool, Bristol though. I hear Belfast has a pretty thriving gay scene as well.