George, I think Fumble might be right also when he mentioned that good BIRs are becoming a it of a rarity and this might be due to health and safety issues. But how do the good BIRs remain good over the years because they must also be subject to the same health and safety laws? Or could it be the good ones cheat?
My favourite BIR (not a restaurant but a takeaway) has been around for years and is extremely popular and very well known around these parts. When you order a chicken Madras or Vindaloo you have to specifically ask for "breast meat" or you end up getting the more undesirable parts of the chicken. This to my mind must mean that they cook whole chickens on mass, probably boiling them. Their curry sauce has a very strong chicken flavoured component to it but not like you would think. Although it is strong, it in no way overwhelms everything and in fact it is more like a subtle after taste. I have tried to recreate this effect using various methods including very concentrated chicken stock and stock cubes, this has always failed because it overwhelmed every thing. Which brings me back to the health and safety and good BIR issue, the poor BIRs I have been to also have this chicken flavour but it is either too strong or virtually undetectable.