Livo - I forgot to thank you for reminding me of traditional kormas when you originally said you didn't like Ghanna's BIR style korma. I found 3 or 4 recipes somewhere and they were all excellent, albeit quite different between each other, and nothing like a BIR korma.
The main changes I made to the lamb bhoona recipe was to add a fair amount of full cream yoghurt and not add any garam masala. This was because an earlier recipe I'd tried 10 years ago for a lamb curry used yoghurt and I thought it was worth trying. The yoghurt may have 'toned down' and smoothed out the spices, for all I know, because, as I said, my end result was really good, at least for my taste.