LONDON, 2015-11-15 — /EPR Retail News/ — Sainsbury’s has unveiled a heartwarming new advertising campaign featuring one of the nation’s best loved children’s book characters, Judith Kerr’s Mog, to highlight the importance of sharing at Christmas. Developed in partnership with Judith’s publishers HarperCollins Children’s Books, and titled ‘Mog’s Christmas Calamity’, the full length 3’30”TV advert…