Trying this one now, SR. Only changes from your recipe are :
1) Double the oil (I like oily curries)
2) "Mix powder" -> "Rajah mixed masala" (I neither have nor use "mix powder" in the sense that that phrase is generally understood here).
3) My base is 175ml "Shaheen" onion masala base, diluted 1:1 with water and liquidised for two minutes, used hot.
Oh, and (4) (I nearly forgot) -- fresh free-range chicken breasts (two); I had no pre-cooked chicken and could not see what benefit(s) it might bring.
Initial impressions (based on sampling chicken and sauce at various stages) is that it is going to be a darn sight better than last night's "
Balti from Rishton", q.v. Possibly a little too tomatoey for my taste, perhaps because the Shaheen base has more tomato content than the one you used. I would also like some fenugreek (ground) or Kasoori methi in it, I think.
P.S. Initial impressions were correct. An excellent curry, SR, confirmed by the fact that when I went back into the kitchen a couple of minutes ago in order to put cling film over the remaining curry, pickles, onion salad, etc., I dipped the remaining 1/4 chapati in the sauce and it was excellent.
** Phil.