The UK, France and Ukraine will work on a ceasefire plan to present to the United States, the prime minister has said, in the wake of Volodymyr Zelenskyy’s White House clash with Donald Trump.
Sir Keir Starmer, who visited Washington on Thursday, said he believes Mr Trump does want a “lasting peace” between Russia and Ukraine.
He also said Europe is in a “moment of real fragility” and he would not trust the word of Vladimir Putin.
It comes as the UK hosts a summit between Mr Zelenskyy and European leaders in an effort to get a peace plan for Ukraine ‘back on track’.
Referring to the argument in the White House’s Oval Office on Thursday between Mr Trump, US vice president JD Vance and Ukrainian president Mr Zelenskyy, the PM said it made him feel “uncomfortable”.
“Nobody wants to see that,” he told the BBC’s Sunday with Laura Kuenssberg.
He added: “We have to find a way that we can all work together. Because, in the end, we’ve had three years of bloody conflict. Now, we need to get to that lasting peace.”
The prime minister said he was in his office when the White House shouting match began to be broadcast.
“Clearly, you know, there’s a lot of tension,” he said. “The cameras were on.”
Later in the evening he phoned both Mr Trump and Mr Zelenskyy, saying his “driving purpose” is to “bridge this and get us back to the central focus”.
On Saturday, the PM said he had “quite a long time with President Zelenskyy” before speaking to Donald Trump and French president Emmanuel Macron on the phone.
“We’ve now agreed that the United Kingdom, along with France and possibly one or two others, will work with Ukraine on a plan to stop the fighting, and then we’ll discuss that plan with the United States,” he said.
Of Mr Trump, he said: “I am clear in my mind that he does want a lasting peace.”
Asked why that was, he said: “Because I’ve spoken to him a number of times. I’ve got to know him. I’ve had extensive discussions with him and I believe his motivation is lasting peace.”
He added: “If the central question you’re putting to me is do I trust Donald Trump when he says he wants lasting peace? The answer to that question is yes.”
The PM said he was still pushing for a US “backstop” on Ukrainian security, adding that it was the subject of “intense” discussion.
The “components of a lasting peace”, he said, include a “strong Ukraine to fight on, if necessary, to be in a position of strength”.
And he is pursuing a “European element to security guarantees”.
“That’s why I’ve been forward-leaning on this about what we would do – and a US backstop,” he said.
“That’s the package: all three parts need to be in place, and that’s what I’m working hard to bring together.”
Asked if he would trust Vladimir Putin, Sir Keir said: “Well, no, I wouldn’t trust Putin, which is why I want a security guarantee.
“I wouldn’t trust him not to come again, because he’s proven that he will come again. He’s already done it and we know what his ambitions are.”
Sir Ed Davey, leader of the Liberal Democrats, said his party would support sending British troops to Ukraine as peacekeepers in the event that a “credible” deal is struck.
Conservative leader Kemi Badenoch said European nations need to “make sure that America does not disengage”, adding: “If we all get dragged into an escalation, America will get dragged into it eventually.”
She described Mr Zelenskyy as a “hero” and said her heart “went out to” him during the on-camera argument at the White House.
“I watched it and I couldn’t believe what was happening,” she said. “He was being humiliated.”
