Getting quite excited about this paste. Marinade consists of G/G paste, the botti paste, yoghurt, lemon juice squirt, mustard/sunflower oil, and a bit of grated nutmeg. That's it. No salt, additional food colouring, or anything else. Tasted spot on, for me.

Tester sample after 6 hr marinade, grilled.

Already thinking better than Blades, better than everything to be honest. Should add I'm not a fan of typical Bangladeshi BIR tikka. Find it incredibly bland as a starter. Pakistani tikka and tandoori cooking in general, however, I love. This is so close. Couple of tweaks including a tad more colour and it should be job done, to my satisfaction anyway.
Rob

I believe the botti bit actually relates to off the bone dark meat.