
Every year, more than 50 tonnes of heroin and cocaine are sold in Britain, but in the north of England a team of specialist roads crime officers are striking back at the multi-million pound business of moving illegal drugs around the country.
Being a motorway cop means having to listen to every excuse in the book: sometimes they're ridiculous and unbelievable, while other times it's down to the skill and experience of the cops to work out fact from fiction.