There is clearly a relationship between the ranking of the university and it's age, though I'm unsure as to how strong this correlation may be. There is then a further relationship between the age and design of the university, since design and architectural fashion changes as time passes. I say this to exemplify what I meant by my previous posts.
To be honest, I don't know all the universities in England, let alone in London. Kings College is nice. Umm I don't really like LSE looks wise