You may not like it, but that agreement still holds weight, and just going the internet equivalent of 'nuh uh' and 'lalala, I cannot hear you' doesn't change that fact.
Man, you are dumb as rocks if you think the UK is scared of Russia, or a less powerful nation than Russia at this point.
The UK has a navy that doesn't need it's main carriers to be towed around by a fucking tugboat in normal operations and accompany it everywhere like the Russian navy, the UK actually has effective R&D to produce things like Storm Shadow and isn't just rolling out PR models of limited production runs (T-14, Su-57) to try to pretend to be a great power. Most of the old Soviet manufacturing base was in Ukraine for the USSR, not in Russia itself, and shit, even the Rapucha-class landing ships that have been getting hit were originally built in Poland before the Berlin Wall fell.
Russia is not the Soviet Union, when it comes to military strength, production capacity, and competency, and the UK has a long memory of fighting against Russian aggression in the Black Sea; the Crimean War was a thing, you know. The UK also has been doing shit without DC's OK, because they do not feel they always need DC's support or permission to fuck up Russia's day, nor feel the need to consult the US public when they know how easily Russian psy-ops work against the US populace these days.
So gnash your teeth and try to ignore reality all you want, the Brits don't give a fuck and aren't subject to any control by the US populace.