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Sarah (not her real name) was 12 when she and her older brother got caught up in county lines drug-dealing.

County lines networks often operate by city dealers recruiting vulnerable young people from country towns and villages to distribute drugs.

Now 14, Sarah told ´óÏó´«Ã½ Radio 5 Live that she sometimes walked for up to three hours at a time to sell "the tiniest bit of weed".

This film is a reconstruction and Sarah’s words have been spoken by an actor.