This is half of the picture - there's no "single Russia". The population is fundamentally split between supporters of progress, religious orthodoxists and quasi-criminal gangs on the top.
"Russia is entering a period of decline and political decay. The population is ageing, while the real income of its middle class is falling. Putin has failed to diversify the economy, and global demand for hydrocarbons is set to fall over the next decade."
it is somewhat hard to claim "principled indiferrence" when the EU and UK is still dependent on Russia for hydrocarbons, even if we all move towards EVs some natural gas will still be used for the power generation.
also some companies such as Virginmedia use Russian equipment as key infrastructure due to the cost savings (look inside a VM box next time some kids open it up and you might see the Cyrillic writing on the coax cable amplifiers)
Also UK is by far not the most attractive destination to live for medium income Russians - weather sucks, property prices are ridiculous and you are basically stuck on an island without Schengen visa, especially after Brexit. You will see many more Russians working and living in EU, like Germany or Spain, or Malta, Cyprus, and other places with nice climate. UK is attractive for Russian cronies and it has been unfortunately positioning itself as such for years.