Where is this all going to end? That must be the feeling of Volkswagen group executives every morning as they watch the TV news bulletins and study the daily papers in the wake of the Emissionsgate scandal. Each new revelation or confession prompts a fresh set of questions. How many people knew about the defeat device to cheat diesel exhaust emissions tests? Who sanctioned it? And now that VW has owned up to fitting it to European cars as well as those in America, where the storm first blew in, could other group brands which do not sell in the US - such as Seat and Skoda - also become involved?