Motorists and even passengers could be slapped with fines as hefty as £1,000 for flouting tightened mobile phone laws. It's a widely known no-no for drivers to so much as touch their mobiles while at the wheel, but now it turns out that back-seat texters and callers might find themselves in hot water if they cause a distraction. According to the car gurus over at BigWantsYourCar.com, few are clued in on the updated Highway Code rules , which now suggest you could wind up punished not just for