Sir Keir Starmer has urged leaders to step up at a "once in a generation moment" for security in Europe at the start of the defence summit on Ukraine.Leaders including French President Emmanuel Macron and Nato secretary-general Mark Rutte are gathered at Lancaster House in London to forge a common position on ending the war.The summit comes after leaders rallied round Ukrainian President Volodymyr Zelensky after his confrontation with Donald Trump at the White House on Friday, which has created

Sir Keir Starmer has urged leaders to step up at a "once in a generation moment" for security in Europe at the start of the defence summit on Ukraine.Leaders including French President Emmanuel Macron and Nato secretary-general Mark Rutte are gathered at Lancaster House in London to forge a common position on ending the war.The summit comes after leaders rallied round Ukrainian President Volodymyr Zelensky after his confrontation with Donald Trump at the White House on Friday, which has created a divide between the US and its European partners.