Thanks Chewy. Your base gave me the nearest to a BIR that I've achieved to date; identical actually.
Only 1 curry with it so far, I ran with a Jalfrezi; 5 tbs oil, rough chopped half onion, rough chopped half red pepper, rough chopped half green pepper, 1 tsp garlic puree, 1 tsp ginger puree, 1 tsp cumin, 1 tsp chilli powder, 1 tbs tomato puree, 1 star anise, 500 ml Chewy 3h base, 500g pre-cooked beef, 1 tsp salt, pinch fenugreek leaves, 1/2 tsp garam masala & fresh coriander. In respect to the Jalfezi, I think the star anise was the final key.
A very good base, more flavoursome than others due to the spice mix; new on me. So far I've tried KD's, a variety on KD's, Darth's and your own. Still have a few more "famous" bases to try yet; hope they are as good as yours.