2015 is set to mark a paradigm shift in how British retailers mark the Black Friday retail holiday with Asda, Oasis and Primark already opting out as it becomes the domain of online sellers confident a seamless experience over a longer trading period can avoid the in-store chaos of previous years. Overcrowded stores, low stock and even scuffles breaking out amongst shoppers dominated last year’s coverage of the event, casting many retailers in an unseemly light.