British Prime Minister Keir Starmer rallied his European counterparts Sunday to shore up their borders and throw their full weight behind Ukraine as he announced outlines of a plan to end Russia’s war.

A group of EU leaders is working towards a peace plan for Ukraine that will be discussed with the US, Sir Keir Starmer has said.The prime minister opened Sunday's summit of European nations by noting they were confronting a "once-in-a-generation moment for the security of Europe" and added: "We all need to step up.