A Netflix drama depicting the covert efforts of Her Majesty’s Customs officers to dismantle heroin smuggling rings in the late 1980s has drawn attention for its gripping and largely accurate portrayal of real events. The six-part series, set during the final years of Margaret Thatcher’s premiership, follows an unlikely group of civil servants who pose as drug traffickers to infiltrate dangerous criminal networks in London and Liverpool.

Unlike typical depictions of undercover operations involving elite police or intelligence agents, the series highlights the work of HM Customs personnel—customarily tasked with duties such as suitcase inspections and VAT enforcement—who were drafted from routine roles and given minimal training before being thrust into perilous assignments. One character describes their mission as “bloody dangerous” while acknowledging their status as mere civil servants, underscoring the unconventional nature of their work.

At the center of the story is Guy Stanton, a pseudonym for a real individual now aged 69, who spoke remotely about his experiences in the operation. Stanton declined to appear on camera, citing ongoing concerns for his safety stemming from past encounters where he faced threats to his life. His undercover role required him to gain the trust of lethal criminals, navigate volatile regions such as the Pakistan-Afghanistan frontier known for poppy cultivation and militant warlords, and even interact with associates of the Medellin cocaine cartel.

Born and raised in West London, Stanton joined HM Customs in 1975 and transitioned into the investigations unit by 1984, the period when these operations intensified. Drawing on his background—including a tough upbringing among streetwise peers, boxing skills, and the ability to defuse tense situations—he adapted to an undercover persona that placed him deep within criminal enterprises. Throughout his career, Stanton concealed the duality of his life from his family, with his wife Sophie, also a customs officer, supporting him despite extended absences during dangerous assignments.

Reflecting on his career, Stanton expressed a degree of reticence about discussing certain aspects, acknowledging the unusual nature of revealing such details after years of secrecy. He described the agents involved as unsung heroes who relied largely on resourcefulness and courage rather than conventional law enforcement training to dismantle formidable drug smuggling operations at a critical moment in Britain’s recent history.

The series’ writer, Neil Forsyth—known for dramatizing the Brink’s-Mat robbery in a prior acclaimed production—has been praised for capturing both the tension and the human element of this largely untold chapter. The story of these HM Customs officers serves as a powerful reminder of the varied and often overlooked facets of law enforcement combating organized crime in the 20th century.