First of a three-part series offering a penetrating insight into the world of drug use among young people in Britain.
Tonight's programme examines the case of Leah Betts, who died of Ecstasy poisoning at her 18th birthday party in 1995, and the effect that the tragedy had on the lives of her family and friends.
See Choice.
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BBC Action Line: for details of organisations offering information and support for anyone affected by drug use. call free and in confidence on [number removed].