You are legally allowed to use your mobile phone when driving providing you have pulled over, stopped in a safe place and switched your engine off. While every driver knows using a mobile while driving is against the law, you may be unaware that this can sometimes apply to a licence holder who is not behind the wheel. When supervising a learner driver, the passenger is subject to the same £200 fine and six penalty points for using their mobile as the person behind the wheel. The law applies to both professional instructors and friends or family teaching a family member. Best advice: a hands-free system is completely legal as long as drivers do not touch or pick up the phone.