Keir Starmer has warned that Vladimir Putin could invade Ukraine again if the US does not provide security guarantees for Europe. The Prime Minister is en route to Washington for a key summit with Donald Trump at the White House on Thursday,

Keir Starmer warns Putin will 'go again' in Ukraine without proper deterrent after Trump talks - The US President has resisted calls to fully commit American troops to peacekeeping efforts in Ukraine

The prime minister wants to keep everyone happy. He has been loath to criticize Trump, has warmed up Britain’s post-Brexit partnership with the European Union, avowedly backed Kyiv and thawed ties with China. At a time of geopolitical upheaval, he is attempting to squeeze Britain into an impossibly tight Venn diagram.

If there is a cease-fire without a backstop, it will simply give him the opportunity to wait and to come again,” Keir Starmer warned on the flight to Washington, D.C.

Keir Starmer will hold a pivotal meeting with Donald Trump, where he'll battle to persuade the US President not to betray Ukraine as the security of the continent hangs in the balance

Keir Starmer will tell Donald Trump that he fears Russian dictator Vladimir Putin will launch another attack on Ukraine, when the US and UK leaders hold a crunch meeting today. Speaking to journalists on his way to Washington, Sir Keir said Putin could "try again" after Russia 's attempt to invade Ukraine three years ago ended in a stalemate.

President Donald Trump said he believed Russian President Vladimir Putin wanted peace after a Russian missile attack on Kharkiv, Ukraine, on March 7.

President Donald Trump on Friday threatened to impose new sanctions and tariffs on Russia over its latest large-scale bombardment of Ukraine.

It comes as Donald Trump said he was 'strongly considering' sanctions and tariffs on Russia until a final peace deal is reached.