Sir Keir Starmer will head to Evian, France today to meet fellow world leaders at the G7 summit as he fights for his political survival in an increasingly hostile geopolitical landscape. Just days after defence secretary John Healey quit his post - accusing the prime minister of being “unwilling to commit the resources” needed to keep Britain safe - Sir Keir will now need to prove that he can still be a responsible global leader and a key player in the G7 as they attempt to navigate wars on two