Sainsbury’s and Argos customers spent twice as much online in the first half of its financial year as they did a year earlier – but spent less in its shops. By September, almost 40% of group sales took place online, up from about 19% a year earlier. Now the supermarket group has responded to that online shift with plans to close 420 standalone Argos shops, up to 80 branches of Sainsbury’s and all of its supermarket deli, meat and fish counters. In all, about 3,500 jobs will go – although the