A few days ago, while travelling home, I decided to pop into a well-known UK supermarket to pick up some essentials. As I walked into the supermarket I spotted a huge sign at the end of every aisle that read: ‘From 8pm until 12am this evening this store will only accept cash payments. This is due to a software update that will not only make your shopping experience better but improve our reliability to you our customers. We apologies for any inconvenience.’