Oh, and a decent, not too pricey foodie spot I liked: http://www.bfi.org.uk/whatson/bfi_southbank/visitor_information/food_and_drink

Turns out the manager (at least when I was there back in Sept) is an expat 4th (or maybe 5th) generation Chinese-San Franciscan (who used to manage the catering for the SF Opera). We bonded over missing SF & he took great care of me.