When the housing market crashed in 2008, David Llewellyn's construction business went with it. Casting around for a new gig, he decided to commercialize something he'd long done as a hobby: making drugs.

2008年住宅市场崩溃的时候，勒维林（David Llewellyn）的建筑生意也陪了葬。为了另谋生计，他决定把一项多年以来的业余爱好变成生意：制造药品。

But the 49-year-old Scotsman didn't go into the illegal drug trade. Instead, he entered the so-called 'legal high' business