Could it be this by any chance

Chicken 65
https://curry-recipes.co.uk/curry/index.php/topic,5599.0.html

I will post pics when i get it finished Stephen.

No worries, thanks for your post.

Tried the brewing as well SS but for me didn't get the flavour i was looking for, there was flavour but not enough, because of the high heat that the chicken is cooked with under the grill the tea leaves just singe away to little black bits of flavour, the marinade itself gets the strong flavour.
Give it a go 

Yes SS will post a picture when i make it again.
Blades recipe, for me, is enough to marinade 5-6 chicken breasts, i did do some trial and error experiments.
Tried placing 1 t-bag in some water in the bottom of the grill pan then cooked chicken as normal, so it kind of smoked the meat, did work but wasn't enough flavour.
After trying different methods i just added it to the marinade and left for about 5 minutes then added chicken breasts, marinade overnight.

I used these http://www.tesco.com/groceries/product/details/?id=255633413

I only paid 1 GBP for them, was on offer.

I use it in Chicken Tikka recipes, Blades mainly, it adds that smokey flavour.
Don't think it would be used in restaurants because they have Tandoori ovens that give the smokey flavour.
I just use 1-2 tsp in blades recipe, just open the tea-bags and store in an airtight jar.

After many experiments i use this in chicken tikka.

Thanks for all the advice.
I just want to get the caked on stuff off more than anything else really so i can start with a nice clean oven, hopefully any way.
What kind of basket do you have in the bottom of yours that the coals sit in?

Looking good, got the recipes for these dishes Bob?

Got a recipe for these Bob?