Motorway Cops: Catching Britain's Speeders

Six police cars plus dogs chase the occupants of a transgressing car, plus an argument over a hockey stick, and a surprising breathalyzer test. (S4 Ep1)

On the outskirts of Congleton, a PC tails a suspected drink driver, who is furious when stopped for questioning. And there's a three-vehicle crash in Cheshire. (S4 Ep2)

PC Matt Turner chases down a drink driver who's caused a collision on the morning school run, and on the M6 a broken down BMW stinks of cannabis. (S4 Ep3)

PC Niaz Waddington pursues a suspected petrol thief. PC Mike Clark thinks a white van man is involved in drugs, and finds a children's toy with sinister contents. (S4 Ep4)

A van is found to contain a high value counterfeit cargo, a crash leaves a female passenger trapped in a car, and a tractor is used to pursue a suspect. (S4 Ep5)

PCs Ian and Matt pull over a Chevvy. A search of the vehicle reveals drugs paraphernalia. In Warrington, cops the hunt for an uninsured driver who may be drunk. (S4 Ep6)