Once you start digging into Russian state influence networks in London you'll also start unwinding all the UAE, Saudi, Qatar and other autocratic state influence networks trying to shape UK outcomes to their advantage in a slightly less crude fashion than the Russian state

The toxic interaction between UK leadership factions and autocratic state actors the UK state could no longer contain started with the Iranian Shah and Gulf monarchs of the 70s, perhaps even Nigerian generals of the 60s. Russians entered an already established system in the 90s

As UK geopolitical decline has accelerated its political leadership factions, business milieus and civil service hierarchies became increasingly vulnerable to cooptation and subversion by autocratic state actors willing to twist British delusions of grandeur to their advantage

If this was just about Russia the British system could survive the shock of root and branch reform of its business and political relationships with autocratic state actors.

This is not just about Russia.