Whether you’re mid-bite, mid-sentence or perhaps mid-sleep, do you react to that ‘bing’ from your smartphone? Or, is it the flashing red light that gets you?You’ve programmed your phone to alert you to messages, or has it programmed you to respond?From the constant smartphone companion to the laptop replacing the lapdog, the Internet has many of us on a very short leash – an addictive one.The consumer research firm Intersperience surveyed more than 1,000 people in Britain and found quitting the Internet is as hard for some as quitting drinking...