What to see: Lyn Gardner's theatre tips
Be sure to catch taboo tale Blackbird as it swoops into Glasgow, and Ex marks the hotspot in London for a new British musicalScotlandLet's start in the wintry north. Sound and Fury's Going Dark, about a man navigating his way without the stars, is at the Traverse in Edinburgh, part of an ongoing tour that winds up at the Young Vic in London next year. So too is Donna Rutherford's Kin, about middle-aged children and …