They’re cheap – but they’re also deadly. Illegal pills costing as little as 50p each are contributing to the deaths of hundreds of people each year in Scotland. Now an expert is warning benzodiazepines, or street Valium, could pose a growing threat elsewhere.

Jane Deith talks to those whose lives have been destroyed by benzodiazepines, a category of drugs usually used to treat anxiety that can be prescribed, but which have become a major feature of the illegal drugs market in Scotland and now elsewhere in the UK.

The so called “street benzos” are a class C drug manufactured in huge quantities in illegal factories and sold for as little as 50p each, less than a bar of chocolate.

From the Clyde to Cornwall, File on 4 hears the stories of those dealing with the fallout from the trade in the drugs, including people who have been addicted to them; a mother in North East England who lost her daughter to a fatal overdose; a teenager who bought them on social media, and an expert who believes their influence is spreading, with potentially dangerous consequences.

Reporter: Jane Deith