Pure curiosity rooted in having written a lot for the last few days on this region...
Does London have any Chechen, Ingush, Dagestani (any of its ethnicites), Karachay, etc restaurants? If none of the obscure ones have anything than I would happily settle for Georgian or run of the mill Circassian. Brighton Beach in Brooklyn has a few of the above now, but I don't think I've seen any of them anywhere else I've ever been EXCEPT for a large number of Circassian restaurants in Istanbul.
I'm still looking for proper Uighur food, but after coming South Tottenham for about 6 hours one day on a vague tip I've sort of retired to my fate. Apparently just about all of London's more newly arrived Uighurs live in South Tottenham around Seven Sisters.