Motorists can sit back and watch TV once self-driving cars are approved on British roads but will be banned from using handheld mobile phones, government plans revealed Wednesday. The Department for Transport set out changes to The Highway Code to “help ensure the first wave of self-driving vehicles are used safely”. A DfT spokesman confirmed that in self-driving mode, users would not be responsible for crashes, handing the baton to insurers. However “motorists must be ready to resume control in a timely way if they are prompted to — such as when they approach motorway exits”, said a DfT stat…