The Motorway Cops: Catching Britain's Speeders — Season 4

A compilation of catastrophic collisions caught on dashcam in this special edition featuring the most shocking scenes from the series, including a cross-country car chase and a driver asleep at the wheel.

Return of the programme following Cheshire Police's elite team of officers as they crack down on some of Britain's most serious driving offenders. Inspector Anton Sullivan is in one of six police cars involved in a pursuit, and officers manage to box the vehicle in, but the chase continues on foot with police dogs, while a suspected drink-driver gives a breathalyser test with surprising results.

On the outskirts of Congleton, PC Rich Woodward tails a suspected drink-driver and when he stops the vehicle the occupant is furious and makes things difficult for Rich and the team. On a country road in Cheshire, Inspector Anton Sullivan attends the scene of a three-vehicle crash, where a trapped driver in a flipped car is struggling to stay conscious.

PC Matt Turner chases down a drink-driver who caused a collision on the school run, while Inspector Anton Sullivan rushes to the scene of a serious road accident in which a schoolgirl has been thrown onto the bonnet of the car. On the M6, PCs Matt Turner and Ian Cosgrove provide urgent back-up to a highways officer concerned about the strong smell of cannabis coming from a broken-down vehicle he stopped to assist.

PC Niaz Waddington catches up with a suspected petrol thief. PC Mike Clark thinks a white van man is involved in drugs, and finds a hidden children's toy with sinister contents.

PCs Niaz Waddington and Andy Doran hunt for a wanted Range Rover and Andy takes up the chase on foot when one suspect makes a run for it after the vehicle is boxed in. After HMRC share intel on a suspect van, PCs Ian and Matt are called in to bring the vehicle to a stop and search reveals a high-value counterfeit cargo.

PCs Ian and Matt are on the receiving end of a rude hand gesture as they pull over the driver of a car that's seen better days and a search of his vehicle reveals drugs paraphernalia. In Warrington, officers are on the hunt for an uninsured driver who might be drunk, while PC Andy is on the hunt for a car linked to drugs.

PCs Mike and Niaz are on the tail of thieves who have stolen more than £5,000 worth of luxury goods from a Cheshire shop and the chase takes them into Manchester city centre at rush hour. On a night shift in Chester, PC Rowan spots a learner driver with missing L plates who doesn't know whether he's coming or going and the man refuses to take a drugs wipe despite reeking of cannabis.