Bring a coat
I spent 4 years in London (Uni). I'm a Cauc. but felt descriminated, though not blatantly so, more on a rather nuanced level. Watch out for this; I don't think it's personal. Brits are islanders, after all.
There's quite a large Asian community, most of my friends were from Singapore, Malaysia and India, coz we shared mind-frame, we had more overlap than with the locals. I'm sure you'll be able to hook up with fellow Asians. But the experience will be all the richer if you
really mingle, right?
All in all, not too bad a place. Flipping cold though. Makan is awful as well. Forget about Asian take-out, it's the worst ever. Locate a toko, buy your own stuff and prepare your own food. That way you'll live
Have fun! And, if you can, let us know how ou get on.
NBB