Tesco to build national network of online-only 'dark stores'

They are not open to the public but used to assist nearby shops unable to keep up with internet ordersTesco is to build a national network of online-only stores as it looks to cash in on the surge in internet grocery shopping.Shoppers are turning their backs on the weekly trek to the supermarket so Tesco is cutting back on store openings to focus on its web arm where sales are expected to double to more than £5bn in the next five years.Nicknamed "dark stores" in the industry they are not open...