President Volodymyr Zelensky has suggested that the parts of Ukraine under his control could be taken “under the Nato umbrella” to try and stop the “hot phase” of the war.

In an interview with Sky News, the Ukrainian president said he would be willing to consider allowing just the unoccupied part Ukraine to join Nato – but only if Nato membership was offered to the whole of Ukraine, within its internationally recognised borders, first.

Ukraine could then attempt to negotiate the return of territory currently under Russian control “in a diplomatic way”, he said.

But the suggestion is highly theoretical. As Zelensky pointed out, no-one has yet made such an offer.

Whether Nato would ever consider such a move is highly doubtful.

“Ukraine has never considered such a proposal, because no-one has officially offered it to us,” Zelensky said.

Nato would need to offer membership to the whole country, including those parts currently under Russian control, he said.

“You can’t give [an] invitation to just one part of a country,” the president said, according to a translation provided by Sky News. “Why? Because thus, you would recognise that Ukraine is only that territory of Ukraine, and the other one is Russia.”

Lots of people were proposing ceasefires, he said, but without a mechanism to prevent Russia from attacking again, ceasefires were simply too dangerous.

Only NATO membership, he said, could offer that kind of guarantee.

The Ukrainian president has already said that he thinks the war could end in the coming year if Ukraine’s allies show sufficient resolve.

Reports suggest that discussion of the so-called West German model (Nato membership offered to a divided country) has been going on in Western circles for more than a year.

But no formal proposals have yet been made.

It is also worth noting that so far Russia’s President Vladimir Putin has given absolutely no indication that he’s abandoned his desire to subjugate Ukraine entirely.

The idea that he would be willing to allow any part of Ukraine to join Nato is, for now, unthinkable.

All the indications so far suggest that any involvement of Nato is a complete non-starter.