I'm heading to London with friends between Christmas and New Years. While I will definitely spend the next week pouring through the reviews here (ahem, and working of course) I was looking to solicit your favorites, Chowhounders! We are looking for a couple of high end spots and then some good lunch or casual spots. Fair to include markets, pubs and Indian, though we will probably not hit too many other non-Continental cuisine ethnic places (live in DC, so we have lots of fine options for that here!) Definitely need one spot at least for "traditional" British fare (read: organ meats.) Thanks!