Chris Deerin: Tartan diplomacy – Why Scotland needs a proper foreign policy of its own

© Virginia Mayo/AP/ShutterstockScotland's First Minister Nicola Sturgeon poses with European Commission President Jean-Claude Juncker, left, and European Union chief Brexit negotiator Michel Barnier
Scotland's First Minister Nicola Sturgeon poses with European Commission President Jean-Claude Juncker, left, and European Union chief Brexit negotiator Michel Barnier