Thanks a lot! :) (y) 🏻
First you need to have no credit on your account. Then you go to your Nintendo account online. Change the region in your profile settings to Russia. Buy the game with a fee free card like Revolut, Starling etc. Then do the same again to switch back to the U.K.
How do I buy it!?
Brilliant game which plays fantastically on the Switch (y)
Yes you can switch to the Russian store and buy but do not do this if you have any credit as it will be lost. You will not lose any Gold coins.