It is a sunny spring afternoon in Warwickshire and I'm parked up in a nondescript hatchback with my cameraman, poised to meet a drug dealer.
He has agreed to sell what he claims to be THC vape liquids to a schoolgirl – an illegal substance which is the main psychoactive ingredient in cannabis.
However, we suspect it actually contains spice, a more potent drug that is highly addictive and can cause serious side effects.
And unbeknown to him, the "schoolgirl" is an undercover BBC reporter who has been messaging him on Snapchat.
On Friday we published an article exposing these drug dealers who are selling vape liquid laced with spice to unwitting teenagers through adverts posted on the social media site.
