Just out of curiosity and being overall lazy to look things up, is there a special recent reason brits are denying russian visa's currently? Or is it just old Cold War era paranoia.
This takes us into current politics, which is best avoided.
However, in brief, if you are really not aware:
1) in early March, there was a nerve gas attack (Novochok) in a city in UK, against an ex-Russian intelligence colonel and his daughter (who was visiting her father from Russia). Novochok is a nerve agent which was created in Soviet Russia.
2) This attack follows other attacks on mostly Russian emigres in UK.
http://time.com/5187333/sergei-skripal-russian-assassinations-uk/
3) London is currently considered to be the money-laundering capital of the world, and a lot of 'dirty' Russian money is involved in that. London is under pressure to clean up.
4) The UK Immigration Department is generally considered to be not fit for purpose. The admin staff follow directives slavishly. e.g. google the "Windrush Scandal".
5) Google 'Brexit and Eastern Europeans"
In all the circumstances above, I am surprised that the rejection of visas for Russians is as low as 60%. You have to bear in mind that any application for a visa is accompanied by payment of a fee. If the application fails, the fee is lost. Make a mistake on the application, and in a strict visa regime, that will be fatal. You can of course reapply, but you have to pay again.
The UK government is currently putting heavy pressure on Pres. Putin and his allies - and if the visa system can be manipulated to cause disruption and make Russians question why things are as difficult as they are, it is part of a common purpose. i.e. to discredit the Russian regime. Unless I am incorrect, the Russian owner of Chelsea FC was recently refused a visa renewal.
I am also sorry for Noggano - but he is a pawn in a much, much larger game.
This goes far beyond 'cold war paranoia'