Scottish leader says EU referendum on knife edge, Brexit could trigger independence vote

By Elisabeth O'Leary and Guy Faulconbridge EDINBURGH (Reuters) - Britain's referendum on European Union membership is on a knife edge and if England backs an exit that drags Scots out of the bloc against their will, Scotland may call a new vote on independence, First Minister Nicola Sturgeon said. Opinion polls have in the past few days shown unexpectedly strong support for leaving the European Union in a June 23 referendum, a step that could rock the EU, test the unity of the United Kingdom and