Poor old Tesco has been much in the news since its £640 million (€812.63 million) takeover of the Quinnsworth/Crazy Prices chain two years ago. There has been criticism of the store on many fronts including its treatment of Irish suppliers and its attempts to close a midlands store in favour of a newer location. For its part, the company has launched a vigorous fightback and has also invested considerable lucre upgrading specific stores. So it was with some pleasure that The Margin - ambling around what looked like a recently-revamped Tesco store during the bank holiday weekend and admiring the British retailer's wine offerings - happened upon an interesting and to-the-point notice on one of the shelves, the gist of which was: Due to customer feedback we have decided to divide our extensive wine range into two sections - red and white. If that's not rocket science, then what is?