Prime Minister Sir Keir Starmer has spoken to US President Donald Trump and Ukrainian President Volodymyr Zelensky after a meeting between the two leaders in Washington descended into a row about US support for Ukraine.

A statement from No 10 on Friday night confirmed the prime minister had spoken with the US and Ukrainian presidents and that he retained “unwavering support for Ukraine”.

Zelensky was welcomed to the White House by Trump, but the cordial meeting quickly descended into a shouting match in the Oval Office as Trump told his Ukrainian counterpart to be more thankful for US aid and accused him of “gambling with World War Three”.

Zelensky is due in the UK on Sunday as Sir Keir hosts a summit of European leaders to discuss an end to the the war between Ukraine and Russia.

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A No 10 spokesperson said: “The prime minister has tonight spoken to both President Trump and President Zelensky.

“He retains unwavering support for Ukraine, and is doing all he can to find a path forward to a lasting peace based on sovereignty and security for Ukraine.

“The prime minister looks forward to hosting international leaders on Sunday including President Zelensky.”

In the heated clash at the White House, both Trump and Zelensky interrupted each other repeatedly during what was supposed to be a prelude to the two leaders signing a minerals deal.

US Vice President JD Vance, sat alongside others in the room, was also involved.

A press conference scheduled to take place later in the day was cancelled, and Zelensky left the White House before the minerals agreement could be signed.

Sir Keir had met with Trump in the Oval Office the day prior, in which the pair agreed to begin work on a new US-UK trade deal.

The prime minister also came bearing a letter from King Charles III inviting Trump to a state visit.

There had been speculation that Sir Keir had also gone into the meeting to seek a US Security “backstop” in a European peace plan for the war in Ukraine, however the US president stopped short of confirming such a commitment.

Trump had previously criticised Sir Keir and French President Emmanuel Macron, who he met with on Monday, of having “done nothing” to seek an end to the war in Ukraine.