Cold Light of Day is a 1989 British horror film[2] written and directed by Fhiona Louise, and starring Bob Flag, Martin Byrne-Quinn, and Geoffrey Greenhill.

[3] Based on the crimes of serial killer Dennis Nilsen, the film is a fictionalized account of his various murders leading up to his apprehension by authorities.

[1] In late-1970s London, middle-aged civil servant Jordan March, apprehended by authorities, recounts the various murders he committed to Inspector Simmons, which are relayed through flashbacks.

The following day, Jordan dismembers and skins the man's corpse, flushing heaps of flesh down the toilet, and boiling his severed head.

The next day, Julie, another tenant who lives beneath Jordan's flat, finds her bathroom plumbing appears to be clogged, and phones the landlord to inspect it.

Meanwhile, the plumber inspecting the building notices a stench of decay, and finds remnants of human flesh in the pipes, leading him to contact the police.

[1] Louise would later recollect that, at the screening "at least a quarter of the audience walked out, but the people who remained stood up and applauded afterwards.

"[5] Time Out wrote that the film "has the lighting and look of an Andy Warhol home movie—heads cut off, lots of static shots of men on sofas—and a soundtrack composed of deep breathing, the pounding of a demolition ball, and church bells.