Yes. Despite tough new mobile phone laws coming into force for drivers, official advice from the Government states the following with respect to using a handheld phone while driving: ‘You can use a hand-held phone if you need to call 999 or 112 in an emergency and it’s unsafe or impractical to stop.’ If you feel genuinely at risk, using your phone to call 999 or 112 is likely to be a successful defence even if it is a genuine police car following you. Trying to use this defence fraudulently, however, is likely have serious implications.