Did this last week, turned out great - much better than anything we've ever tasted at home before and approaching what you'd get in a BIR.
Made a few changes to the sauce:
-no sugar
-no food colouring
-half a block of cream coconut
-tesco medium curry powder for the spice mix
-pataks tandoori paste (have since got hold of some tandoori masala)
Did the chicken tikka from an Easy Indian Cookbook (Manju Malhi) but it wasn't that great. Since tried one of the recipes from this site which was much better.

