With her easy-going, approachable personality, reporter Stacey Dooley often gets the inside stories that other TV journalists would kill for.

That’s the case this week when she investigates the increasing use of social media to supply Class A drugs to teenagers in the UK.

Posing as a schoolgirl, Stacey shows how MDMA pills and cocaine can be bought in a matter of minutes from dealers advertising via mobile apps – and she even persuades the dealers to talk candidly to her on camera.

Cutting-edge current affairs at its best.