Costa Coffee unveils its full-on festive new limited edition Christmas menu   London, 2016-Nov-24 — /EPR Retail News/ — The nation’s favourite coffee shop, Costa Coffee, today (Nov 23, 2016)  unveils its full-on festive new limited edition Christmas menu, now in-store. From stand-out scrumptious coffee options and utterly decadent hot chocolates to a brand new Christmas sarnie…