This BBC Radio 4 programme for its “File on 4” series examines “Waste crime” – the illegal disposal of the UK’s mountains of often hazardous rubbish, and those involved are finding new and inventive ways of cashing in. It investigates how gangs hide hundreds of tonnes of waste in fields and makeshift tips around the country, and goes out with enforcement officers as they raid factories and depots around the country. The crime costs the UK an estimated £600 million a year, as it’s escalated from opportunist fly-tipping to a dangerous and competitive criminal industry.