Edge of Darkness policy debate about energy and environmental issues. Advice on the policing aspects of the serial was provided by the West Yorkshire Police and former Scotland Yard detective Jack Slipper, famous for his pursuit of the train robber Ronnie Biggs. The musical score was provided by Eric Clapton and Michael Kamen. Clapton was approached to provide the score by producer Michael Wearing. Shortly afterwards, when Michael Kamen brought Clapton to a screening of "Brazil" (1985), which he, Kamen, had scored, Eric suggested a collaboration between the two on "Edge of Darkness". Kamen became one of Hollywood's most successful film composers, writing
Ronnie Biggs million in 2017); Biggs's share was £147,000 (equivalent to £ in 2019). With their timetable brought forward due to the police investigation closing in, Biggs returned home on the following Friday, with his stash in two canvas bags. After an accomplice failed to carry out his instructions to burn down Leatherslade Farm to destroy any evidence there, Biggs's fingerprints were found on a ketchup bottle by Metropolitan Police investigators. Three weeks later, he was arrested in South London, along with 11 other members of the gang. In 1964, nine of the 15-strong gang, including Biggs, were jailed for the crime.