A dodgy scrap dealer is spotted up to no good in County Durham, but his attempt to flee the grime scene is captured in evidentially invaluable technicolour. In Surrey, a pair of water engineers head out to tackle the damage caused to the UK's sewer system by some of the 11 billion litres of effluent flushed down British U-bends every day, while Malvern's enforcement officers Dan and Jude spend their days hunting for fly-tippers and rubbish dumpers, but need to get their prevention message across in a different way