There was recent message on the board 'Some London schooling on curry, please' http://chowhound.chow.com/topics/574550 that was very interesting but never got around to making too many suggestions about what to order.
I'd love to get some suggestions--generally I just pick something on the menu at random. Last night I had dinner on Brick Lane and tried my old stand-by "I'd like whatever is most delicious." Ended up with a chicken rezala (I think) which was not delicious and a lamb ureebisi which was very delicious.
What are you favorite dishes at London curry places?