It depends where you go in London to compare it
Its going to be a bit more quieter because these less people, but its still pretty good fun
Campus has a club and bars that are open every night and play all sorts of music
Town has a few bars and clubs, town is nice during the week as normally you have student nights, at the weekend I wouldn't brother about the town because campus is cheaper
you are only a 50 min train ride away from London, these a few bigger towns near by, Chelmsford or Ipswich
night life is what you make of it