Cutting-edge technology has been in the newspapers this week. The Mail on ­Sunday revealed that scientists have invented an attachment for shopping trolleys that remembers a customer's shopping list and will ­actually guide them to the right part of the store. It even uses the list to plot the quickest route around the shop and doubles up as a checkout-and-go device to help customers avoid long queues. The Financial Times had a page ­devoted to internet shopping and the ­possibility that Marks & Spencer will set up ­internet points in-store so that its customers can place online orders for items that are not stocked in that ­particular store. The paper also reported that Tesco was planning an overhaul of its internet operations, including building its own supply and distribution chain to support internet sales of a wider range of products. Also making the headlines this week was the news that Anchor butter has been banned from Europe. The Daily Mail reported that the ­decision to ban all New Zealand butter was taken by EU trade ­commissioner Peter Mandelson ­following a complaint from a German dairy firm. In another ­development, The ­Financial Times reported that budget sandwich group Benjy's has gone into administration. ­Private equity firm Hamilton Bradshaw has ­acquired the company for an ­undisclosed sum and will take on the running of the business.