Ok so after a few hours I tried a simple chicken jalfrezi using the base. Put about a tablespoon of oil in a pan and heated, then added a pinch of cumin seeds and a tsp of spice mix. after about a minute added a roughly sliced onion and cooked for a couple of minutes until starting to go soft. Added 2 tbsp base, plus a tsp of Veeraswamy madras paste, then added 2 chicken breasts cut into about 1 inch cubes and cooked again until the chicken turned white, about 2 mins, then added half a green pepper, one tomato quartered and 6 green chillis cut lengthways. After another 5 mins added the 2.5 ladles base sauce and cooked for another 5 mins or so.
Results was very tasty but the sauce was too thick - I think it needs more water or chicken stock, rather than 400ml I suspect 600 or even more might be better.