Alex Ritson

It's very hard to see Russia going for that.

It said previously that it won't.

And so if you're not going to have US troops on Ukrainian soil, then you can imagine Zelensky will perhaps seek to get guarantees on the improvement, the continued improvement of his own military to prevent Russia launching an invasion after the fighting pauses.

But, you know, for Kiev and

It is keeping America engaged.

But as for progress, no matter how much positive spin or deadline Donald Trump imposes on things, we don't seem to be moving still.

Yeah, the wording's interesting, isn't it?

NATO-like security guarantees.

What does that mean?

In essence, it's the idea that Ukraine's allies, if Ukraine was attacked again, would come to its aid.

What Ukraine wants is our foreign boots on the ground.

They want a multinational force, which has been pledged by certainly European allies, but there has yet been any kind of strategic clarity as to what that means.

He wants America to share its intelligence, its sophisticated long-range missiles, and to dangle the threat

that it would directly intervene if Vladimir Putin replenished and had another go down the line.

But clearly, and has been the case throughout, the US has been very reluctant to do that.

Meanwhile, the head of Ukraine's largest energy provider says his company is living in permanent crisis mode as Russia continues its attacks on the energy grid.

Most of the country regularly suffers lengthy power cuts as winter temperatures fall below zero.

Maxim Timchenko, the head of DTEK, which provides power for more than five million Ukrainians, told the BBC's defence correspondent Jonathan Beale the intensity of Russian attacks means it's proving very hard to recover.

Russians started so massive and intense attacks on every power station we operate.

Then we just don't have time to recover.