Common knowledge is that Russian billionaire mobsters thrive in London while reportedly enjoying investing.
They're Oligarchs who have a strong connection between Russian money and illicit finances. A recent report by Parliament’s intelligence committee called London a “laundromat” for tainted Russian rubles. London is an airing cupboard: where loot ends up after being rinsed elsewhere.
The Russian ruble weakened to 76 per USD in mid-February as increased geopolitical tension and fears of western retaliation brought investors to sell their ruble positions.