Xarlen,
I did my BA in Psychology in the US and grad school in the UK in Social Pyschology (for my master's) and Sociology & Politics (for my PhD). I can only really comment about London and Oxford because those are the only two British universities I've attended.
The University of London (which includes University College and the London School of Economics) has some good Psychology departments. You don't need a car in London and public transport is generally good although some parts of the underground (subway system) are unreliable. London has a lot to offer both RPG and non-RPG related. There's a castle, some great museums and three RPG stores. The problem with London is that it's very expensive. You may be able to get college accommodation for little rent. If you have to fend for yourself, you should be able to get by on $500 a month, but it would be a pretty frugal existence.
Oxford University's Psychology department is officially the Department of Experimental Psychology which really means that they don't have very much Social or Clinical Psychology. Getting into Oxford University isn't easy, although it's not too bad if you're only doing a year abroad as an undergrad or a taught master's degree. For anything else, your chances aren't any better than getting into Harvard or the like in the US. Oxford itself is a lovely city physically. The students are good-natured but the locals can be pretty rough. It's very easy to get around without a car. In fact, you're better off without one. Most places are within walking distance. There's a comprehensive bus network for anywhere else. London is about an hour away by coach or train, and getting there by coach is pretty cheap. Accommodation on the open market can be expensive but your college should be able to house you fairly cheaply. There's an active RPG scene especially during the undergrad term time (which is only 8 weeks long) with a long-standing Oxford University RPG society. There's also a pretty good RPG store called the Gameskeeper about 10 minutes on foot from central Oxford. Oxford has a fair amount of non-RPG things to do as well, but not nearly as many as London.
You will probably find that British courses (at London, Oxford or elsewhere) offer far less guidance than in the US. You're left to figure out a lot more for yourself. Professors won't tell you which chapter or even book to read. At best, they'll give you a lengthy bibliography. So the UK's system has far less "hand holding" than the US's. Also, if you haven't been to the UK before, you might be shocked by the relatively low standard of living compared to the US and surprised about how modest British people are.
If you have the ability to study independently and you're not overly wedded to consumerism, you'll find studying in the UK a very rewarding experience indeed.
If you have any questions about the above or studying in the UK, post below and I'll do my best to reply.
And, only 8 weeks? It's 14 here.
