Mark Bittman singled out these four restaurants in an article on "no-fuss" "Indian" restaurants in London:
Cafe Spice Namaste
Tayyabs gets lots of Chowhound love, but I don't recall -- and the search function confirms -- seeing anything about the others. Any thoughts/recent visits?
The colleague who brought me to Dishoom a few weeks ago loves Chor Bizarre, so we might end up there next week.