There’s been a bit of a trend over the last decade of short-run British TV mini-series being turned into feature films. One of the early of these British mini-series to be turned to feature film was the six episode series Traffik (1989) that was adapted as the film Traffic (2000).
Traffik presents a global heroin trade that starts in places like Pakistan, winds its way up through Europe and finally ends in the streets of Great Britain.