Guy's,
Think I have mentioned this before but, my local TA (Pakistani owned) does a cracking tikka. Their chicken tikka is pale yellow, really tender and very savoury. Their Lamb tikka is a different beast all together. It's quite sweet, red and has a minty undertone. I'm pretty sure their Tandoori chicken is marinated in the same marinade as their lamb, but the fact that it's chicken gives it a very different flavour. Quite clever on their part I think, to create three different flavours from two recipes. They don't have a tandoor, they have a massive big grille plate, with extraction that could suck your wig off if you wore one, lol.
Incidentally, their tikka's and Tandoori chicken are all displayed in large fridges, pre-skewered and uncooked. There is very little marinade on them, especially the chicken but the flavours are quite strong.
Makes me wonder if they are not just marinated in Tikka and tandoori paste with a bit of this and that thrown in. What I would say though is, I don't think that they use yogurt. The coating on the meat is too thin for yogurt to be included, or that's how it seems to me.
Ray
