We know how it goes in our country:
Government caught on the hop about what is really happening on the ground, following weeks of 'we know best' statements (just like Afghanistan)
Lots of blustering soundbites that sound like things cut out of an episode of Frasier "the Russian will feel the steel trap of sanctions if boots land on Ukranian soil" - that sort of nonsense
Opposition, media, commentators, general public will ask the Tories are you going to come down hard on all the ill-gotten funds slushing around London and stuffed in the pockets of vested interests across government that was first encouraged by Cameron and Osbourne following their election. No real answer will be forthcoming.
Russia invades Ukraine. Apologists such as Aaron Banks, Farage, and other right wingers will say well, it was Russian land all along anyway. The hard left will welcome the growth of a new 'bloc' next door to the EU.
Brexit Britain sits idly by as it is compromised on all fronts in response to this (hypocrisy on international law, energy requirements, political capital with other nations, financial interests). We are basically a landing strip for actual US power now.