Aren't we (UK) putting boots on the ground in support of Ukraine, directly opposing USA? We're going to fight on both sides - the side of expansionist oligarchs (Russia, USA) _and_ the side of democracy?

Wouldn't be surprised if the UK winds up trying to play the same 'both sides' game that Turkey generally tries to play. Ukraine is obviously much closer to home for the UK, but interests may align in other areas of the world.

"Real military allies."

Given Sir Kier Starmer regards himself as New Labour and it was Tony Blair that got us into the illegal wars of Iraq and Afghanistan to please the Republican Americans, then yes I expect he might get us into another illegal war (e.g. Iran) to please the Republicans.