So the question for the purists is, Is this BIR?
As far as I'm concerned, if it's cooked and eaten in a BIR, then it's BIR, regardless of where the recipe originated from.
After all, most BIR dishes have their origins in traditional Indian recipes and have been streamlined and tweaked for English taste and speed of production.
Rhogan Josh (Ghost?) is a typical example, a spicey lamb dish made with mild but deep red Kashmiri chillies goes through the BIR translation and comes out as a chicken or lamb dish cooked with tomatoes to make it look red.