7x4 - Motorway Cops: Catching Britain's Speeders

It's a wild night on Newcastle's roads. PCs Jamie Leslie and Máire Curran stop a teenage drink-driver after a party. In the West End, a driver with no licence, no insurance and cannabis in his system barely reacts when pulled over. In Sunderland, PC Martain Anderson races to a crash involving a motorbike and a car. Dashcam footage may reveal what really happened.