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URGENT: Birmingham, Surrey or gap year?

I've been thinking and thinking on this one, but with the deadline for decisions tomorrow I'm in desperate need of some advice.
I'm currently on a gap year and applying for psychology, but since I didn't have a science A Level the only universities I have offers from are Birmingham and Surrey, which is fine because both look good.
I've been to both and really liked the course ethos at Surrey, but Birmingham seemed much better in terms of diversity, nightlife and events etc. Could anyone from either of those universities give me advice on life at their university and at their psychology department?
My ideal university would be Bristol, but to go here would mean taking another year out to gain a Psychology A Level, which I really don't want to do. From an undergraduate perspective, is it better to compromise and go sooner or wait another year for the best option?