Russia are simply doing what Britain have done for most of our history, including over the past decade- securing their own political and strategic interests. It's what Imperial countries do.
I have no moral difficulty in pointing out that what Russia is doing is morally unjustifiable because I maintain its true whoever does it, including thr UK.
But the UK's greatest national myth is basically that we were the good type of invader, coloniser, and that the millions of deaths and the reourposing of other people's wealth and people without permission that we orchestrated was basically fine.
As long as that myth holds true, we have basically no leg to stand on in situations like this. Either these things are acceptable, or they're not. If they're not, then Britain isn't an exception.