By my calculations, the remake of Poldark (BBC1, Sunday) is the first time BBC drama has returned to Cornwall since that famously mumbling Jamaica Inn — which may explain why even the lowliest yokel here tends to project from the diaphragm. Leading both the cast and the diaphragm-projection is Aidan Turner as Ross Poldark, initially seen as a British Redcoat in a wood rather unconvincingly captioned ‘Virginia, America, 1781’.