Ukraine war 'will be lost if the allies don't step up', David Cameron warns as US Republicans hold up aid

In his speech at an event in Brussels hosted by the Royal United Services Institute, Lord Cameron said Nato needed to demonstrate its "relevance" to younger people who had not grown up with the threat of the Cold War. He said: "I think we have to win the argument for Nato all over again with a new generation, a generation that can see, yes, look at the threat that Ukraine has faced from Russia, but I think we need to go back to a more foundational argument, which is this. Fundamentally, the greatness of Nato is it allows countries to choose their own future."