I know a magical West Country woodland where a sunlit stream meanders through the great oaks, with a series of neatly dammed pools that hum with life; dragonflies and mayflies, swallows, swifts, kingfishers, amphibians and small fish teem here in numbers rarely seen in Britain. The birdsong is cacophonous. The water’s edge is lined with the fresh growth of willow, hazel and alder, artfully coppiced as if by a skilful gardener.