You were "suggesting" that the UK and the US are "dragging out" the conflict. I am "suggesting" that this is back-to-front, as
a) the belligerents are Russia and Ukraine. Plus maybe Belarus and a few mercenaries (probably on both sides).
b) the UK and the US are not belligerents. NATO is not a belligerent. China is not, either. All these powers have been crystal clear that they would not intervene militarily.
c) they have between limited and no capability to "drag out" the conflict, or indeed stop it. The 2 Vlads are the ones with that ability.
Your "suggestion" effectively pins an unspecified portion of the blame for Putin's war of choice dragging on not on the aggressor or the plucky defenders, who for some reason are accepting huge casualties to defend their sovereignty, but on the bystanders that are still shipping resources to the underdog. My point is this is a marginal effect: the main reason is the determination on both sides. There is a pacifist view (not saying this is your view, BTW) that Zelensky should have rolled over on Day 2 to save lives, and that anything that delays Russia's justified and inevitable victory is a crime, but Zelensky and most Ukrainians don't seem to be subscribing to it. And cutting the flow of defensive armament to Ukraine would probably not save lives at this stage.