The UK is a nice friendly tax haven / play ground for Russian billionaires. I'm sure they'd like keep it that way. You might as well ask why the UK wants to influence the Channel Islands.I am not sure that I see anything to worry about in the above. Its unlikey that the Russians would even want to try and exert any leverage in the UK for the obvious reason that the UK doesnt matter in realpolitik. We have little or no influence in the world of the big boys like the US, China, the EU. We have no secrets worth bothering about because we have proved time and again that HMG leaks like a seive. So can anyone explain why Putin would bother to "turn" Boris?