Heroin users in Scotland are being trained to spot when someone is about to overdose and to step in and help.

The training – which includes lessons on how to use the antidote naloxone - is often led by people who have themselves been addicts.

Taxi drivers and police officers are also being trained, and naloxone being widely distributed, as part of a push to save as many lives as possible.

Reporter Craig Langran investigates whether the approach is working.

Presenter: Myra AnubiProducer: Craig LangranSeries producer: Tom CollsSound mix: Annie Gardiner and Hal HainesEditor: Penny Murphy

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Image: Wez, who trains heroin users how to administer naloxone