No new pledge on Ukraine missiles after Starmer-Biden talks in Washington

Putin said such a move would represent Nato’s “direct participation” in the Ukraine war.

Addressing reporters ahead of his meeting with Sir Keir at the White House, Biden said: “I don’t think much about Vladimir Putin”.

To date, the US and UK have not given Ukraine permission to use long-range missiles against targets inside Russia, for fear of escalation.

However, Ukrainian President Volodymyr Zelensky has repeatedly called on Kyiv’s Western allies to authorise such use, saying it is the only way to bring about an end to the war.

Since Russia launched its full-scale invasion of Ukraine in February 2022, Ukrainian cities and front lines have been under daily bombardment from Russia.

Many of the missiles and glide bombs that hit Ukraine’s military positions, blocks of flats, energy facilities and hospitals are launched by Russian aircraft deep inside Russia.

Kyiv says not being allowed to hit the bases from which these attacks are launched hinders its self-defence capability.

The UK previously said Ukraine had a “clear right” to use British-provided weapons for “self-defence” which “does not preclude operations inside Russia”, following Kyiv’s surprise cross-border incursion last month.

However, this excludes the use of long-range Storm Shadow missiles in territory outside Ukraine’s internationally recognised borders.

The US provided long-range missiles to Ukraine earlier this year, but like Kyiv’s other Western allies these have not been authorised for use on targets deep inside Russia.

Asked if he was intimidated by Putin’s threats of a potential war with Nato, Sir Keir said “the quickest way to resolve” the war in Ukraine “lies through what Putin actually does”.

Sir Keir said the White House meeting with Biden was an opportunity to discuss the strategy in relation to Ukraine, “not just a particular step or tactic”.

The pair also discussed the situation in the Middle East, where the Israel-Gaza war has been raging for nearly a year, and “other areas across the world”, Sir Keir added.

He told reporters they would get another opportunity to discuss these issues at the United Nations General Assembly next week.

In a separate briefing on Friday, ahead of the two leaders’ meeting, US National Security Council spokesman John Kirby said Washington was not planning any change in the limits it has placed on Ukraine’s use of US-made weapons to hit Russian territory.

Earlier on Friday, Moscow expelled six British diplomats, revoking their accreditation and accusing them of spying.

The country’s security service, the FSB, said in a statement it had received documents indicating Britain’s involvement in inflicting “a strategic defeat” on Russia. The accusations were dismissed by the UK Foreign Office as “completely baseless”.

In an interview with the BBC, UK defence analyst Justin Crump said Putin was testing the new Labour government and the outgoing Biden administration.

“Ultimately Russia already supplies weapons to the UK’s adversaries, and is already engaged in ‘active measures’ such as subversion, espionage, sabotage, and information/cyber operations against Nato members’ interests.

“This may all accelerate, but picking a fight against all of Nato is not something Russia can afford given how hard they’re struggling against just Ukraine,” Mr Crump added.