Even if a lot of people don’t value the Indian cuisine, it is possible to have a michelin indian restaurant.
Indian food is always associated with the takeaway industry and brands such as just east have brought a bad appeal to indian and Chinese restaurants.
On the contrary Indian food is superlative good especially if eaten in the right places (avoid justeat as a start).
Tamarind is a fine restaurant in Mayfair with a michelin star. In my opinion the michelin star has been assigned mainly because of the idea of a fine indian restaurant with a high level of service more than to classify this restaurant as the best and most flavored indian food in London.