Summit crucial for Ukraine's security guarantees and support

A summit of European leaders in London, attended by Ukraine's President Volodymyr Zelensky, is set to be significant amid rising tensions between the U.S. and Ukraine. UK Prime Minister Sir Keir Starmer has expressed support for Ukraine. Recent diplomatic exchanges have highlighted a rift between the U.S. and Ukraine, complicating the UK's role as a mediator. Critics in the UK are calling for the cancellation of Donald Trump's upcoming state visit due to these tensions. The summit aims to address security guarantees for Ukraine, with the UK seeking air cover in any peace deal. This request poses challenges for the U.S. president, who is reluctant to engage in foreign military actions.