Hi Chris, the recipe I use is as follows. Its very similar to the ones you find here. I do a first marinade stage of tandoori masala(trs) lime juice, salt and yellow food colouring powder. Just mix the chicken in this and leave for 20 minutes or so. Then I mix together this
1tbs kashmiri masala paste
1tbs tandoori paste
1tbs tikka paste
8 tbs natural yogurt
1tbs g/g paste
1tbs mustard oil
1tbs methi leaves
1 1/2 tsp Coleman's garden mint
1/2 tsp garam masala
1/2 tsp tandoori masala
Juice of 1 lime plus a bit of zest
add the chicken and leave in an airtight container in the fridge for 24 hours.
Hope this helps
thanks
Rob