Stacey Dooley delves deep undercover into the nascent world of Britain's digital drug dealers. Using fake profiles on Instagram, Snapchat and new social app Yellow, she reveals how school children as young as 15 are selling class A drugs on social platforms. It is only a matter of seconds before Stacey is offered everything from cocaine to meth.

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As the digital drug revolution gathers pace, it runs the risk of turning into an epidemic as Snapchat, Instagram and Yellow appear to be doing very little to quash this drug dealing haven.