A “cheap ceasefire” between Ukraine and Russia – with Kyiv forced to surrender land – would create an “expensive peace” for the whole of Europe, Norway’s foreign minister has warned.

Espen Barth Eide explained this could mean security challenges for generations, with the continent’s whole future “on the line”.

It was why Ukraine, its European allies and the US should seek to agree a common position when trying to secure a settlement with Vladimir Putin, the top Norwegian diplomat told Sky News in an interview during a visit to London on Tuesday.

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“I very much hope that we will have peace in Ukraine and nobody wants that more than the Ukrainians themselves,” Mr Eide said.

“But I am worried that we might push this to what in quotation marks is a ‘cheap ceasefire’, which will lead to a very expensive peace.”

Explaining what he meant, Mr Eide said a post-war era follows every conflict – big or small.

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Inside Ukraine’s underground military HQ

How that plays out typically depends upon the conditions under which the fighting stopped.

“If you are not careful, you will lock in certain things that it will be hard to overcome,” he said.

“So if we leave with deep uncertainties, or if we allow a kind of a new Yalta, a new Iron Curtain, to descend on Europe as we come to peace in Ukraine, that’s problematic for the whole of Europe. So our future is very much on the line here.”

He said this mattered most for Ukrainians – but the outcome of the war will also affect the future of his country, the UK and the rest of the continent.

“This has to be taken more seriously… It’s a conflict in Europe, it has global consequences, but it’s fundamentally a war in our continent and the way it’s solved matters to our coming generations,” the Norwegian foreign minister said.

Russia ‘will know very well how to exploit vagueness’

Asked what he meant by a cheap ceasefire, he said: “If Ukraine is forced to give up territory that it currently militarily holds, I think that would be very problematic.

“If restrictions are imposed on future sovereignty. If there’s vagueness on what was actually agreed that can be exploited. I think our Russian neighbours will know very well how to exploit that vagueness in order to keep a small flame burning to annoy us in the future.”

Progress being made on peace talks

Referring to the latest round of peace talks, initiated by Donald Trump, Mr Eide signalled that progress was being made from an initial 28-point peace plan proposed a couple of weeks ago by the United States that favoured Moscow over Kyiv.

That document included a requirement for the Ukrainian side to give up territory it still holds in eastern Ukraine to Russia and Mr Eide described it as “problematic in many aspects”.

But he said: “I think we’ve now had a good conversation between Ukraine, leading European countries and the US on how to adapt and develop that into something which might be a good platform for Ukraine and its allies to go to Russia with.

“We still don’t know the Russian response, but what I do know is the more we are in agreement as the West, the better Ukraine will stand.”