Cosgrove Hall were very much at the forefront of stop-motion animation in Britain at the start of the 1980s with their award-winning “Danger Mouse” and with this, probably their finest long-form adaptation of Kenneth Grahame’s charming story. It’s “Mole” who gets fed up repainting his burrow and so sets off for a stroll to see his friend “Rat” and thence deep into the wintry woods to find “Badger”...