Sir Keir Starmer has said the United States “is right” about the UK and Europe needing to take more responsibility for defence and security.

The prime minister, speaking at the Scottish Labour conference in Glasgow on Sunday, said he is clear Britain “will take a leading responsibility” in protecting the continent.

“Instability in Europe always washes up on our shores,” he said.

“And this is a generational moment. I’ve been saying for some time that we Europeans – including the United Kingdom – have to do more for our defence and security. The US is right about that.”

He added “we can’t cling to the comforts of the past” as it is “time to take responsibility for our security”.

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Donald Trump sparked an emergency meeting of European leaders this week after he said European NATO members should spend more on defence, while the US should spend less.

Sir Keir has said he will set out a path for the UK to spend 2.5% of GDP on defence, up from the current 2.3%, but has not indicated when that will be.

It is believed he may announce the details when he visits Mr Trump in Washington DC on Thursday, bringing forward the announcement that was expected in the spring when a defence spending review is published.

The prime minister reiterated the UK will “play our role” if required in Ukraine following a peace agreement after he earlier this week said the UK would send troops to be part of a peacekeeping force.

However, his comments caused a row with Germany and Italy who said it was premature to commit to boots on the ground, although France agreed with the UK.

Sir Keir said: “As we enter a new phase in this conflict, we must now deepen our solidarity even further.”

He added: “There can be no discussion about Ukraine without Ukraine.

“And the people of Ukraine must have long-term security.”

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This week has seen US officials meet their Russian counterparts in Saudi Arabia to discuss Ukraine – which has been met with indignation by Ukrainian President Volodymyr Zelenskyy as none of his team were invited.

No Europeans were invited either, sparking concern the US is pandering to Vladimir Putin.

Sir Keir has promised Mr Zelenskyy he will make the case for safeguarding Ukraine’s sovereignty when he meets with Mr Trump, who has called the Ukrainian president a dictator.

Mr Trump also said Sir Keir and French President Emmanuel Macron, who will visit the White House too this week, “haven’t done anything” to end the war.