This got mentioned (by me) on another thread but someone pointed out it perhaps deserves one of its own.
Obviously Lahore Kebab House and Tayyabs get a lot of the plaudits for good curry in London and I'm a huge fan of both.
The Delhi Grill is Indian (the others two are Pakistani) but they actually have quite similar menus with seekh kebabs, lamb chops, chicken tikka and tandoori and samosas to start and classic Chicken Karahi, Rogan Gosht, Chana and Dhal as mains. They also offer a fish pakora which was excellent and is usually up as a special.
As a huge fan of that sort of food I've been totally blown away by the Delhi Grill - the food really is top class and bears comparison with the two famous east end restaurants. As I know a lot of chowhounders are staying in hotels in the west end, Angel tube is quite a lot more convenient than Whitechapel to get to and from.
They also sell sandwiches outside during the day and the Evening Standard put those in the top 10 in London last week.
Until recently you didn't have to book but we went back on Saturday and they were turning people away so it's probably advisable to do so at the weekends now.