The content originally appeared on: CNN A version of this story first appeared in CNN Business' Before the Bell newsletter. Not a subscriber? You can sign up right here. You can listen to an audio version of the newsletter by clicking the same link. London (CNN Business)Retailers can breathe a sigh of relief now that the Christmas holiday is over, capping months of laborious planning to keep shelves stocked over the busy shopping period. But it may not be much […]