As far-fetched as Alexei Navalny’s means of death might sound, Russia has a history of using rare poison against its opponents dating back 100 years, and this time it could have severe consequences for the war in Ukraine, says Mark Almond I t is the type of story that could run under a “You couldn’t make it up” heading in a tabloid newspaper. Yesterday foreign secretary Yvette Cooper and four of her European counterparts announced that their countries’ intelligence services and chemical weapons