The leaders of Britain and France are spearheading a desperate diplomatic drive to shore up Europe’s security, bolster Ukraine’s defenses and ensure the Trump administration doesn’t seek a ceasefire on terms that reward Moscow for invading its neighbor.

Britain will play a leading role in securing peace in Europe, but must have the “strong” backing of the United States, Sir Keir Starmer has said. During an address in the Commons on Monday, the Prime Minister insisted that the future of Ukraine is vital for our national security.

A group of European leaders is working with Ukraine on a peace plan that will be discussed with the US, Sir Keir Starmer has said.