Don't worry I'm not going to start singing!
In the last 8 years I feel I've tried every combination of base recipe, youtube video and ebook in the quest for that elusive taste, I've done traditional indian cookery classes, wasted not-inconsiderable sums of money on books and ingredients and still I'm coming up short with the humble madras. To this end, I'm back to studying things in a more scientific way through compare and contrast. I know some members have taken this approach before of reverse-engineering, but I really think with a combined effort we could get a bit closer.
Bear with me on this one, but I'm rather partial to the Asda supermarket ready meal curries such as
http://groceries.asda.com/asda-webstore/landing/home.shtml?cmpid=soc-_-ghs-_-yourasda-_-chosenbyme-_-socialhub&utm_source=yourasda&utm_medium=sco&utm_term=socialhub&utm_content=chosenbyme&utm_campaign=ghs&#/product/910001051790this one. I've tried them all, both the main players like Sharwoods and Pataks, curry pastes, cook-in sauces, ready meals and the Asda range seems to be the closest out of the lot to BIR (to my tastes anyway). The ingredients list states:
Water , Cooked Marinated Beef (25%) [Beef (88%), Onions, Spices, Rapeseed Oil, Salt] , Onions , Onion Pur