I suspected he would be using Rajah as it seems to be the yard stick over there. The actual Rajah brand is not available to me locally although I can obtain it online. This may well be worth the extra effort and cost if it is that far superior. I can get to Sydney in under 2 hours so I may have to look for the nearest supply link. I do have all the necessary whole spices and single powders so I'm happy to make my own "Rajah Curry Powder" if someone cares to share a method of making a similar product to it.
The main point here was about the early apparent kerfuffle in the use of Tandoori Powder which essentially is just another combination of the same spices we already use and it is added in such small quantity to the recipe anyway. I understand that it isn't "normally done", but that doesn't make it wrong, particularly in this food style which is known for individual variation.