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 and travelled to Britain from Australia to visit Biggs in February 2012, just before filming for "Mrs Biggs". In March 2013, Biggs attended the funeral of fellow train robber, Bruce Reynolds. In July 2013, "The Great Train Robbery 50th Anniversary:1963–2013" was published, with input from Biggs and Reynolds. On 18 December 2013, aged 84, Biggs died at the Carlton Court Care Home in Barnet, north London, where he was being cared for. His death coincidentally occurred hours before the first broadcast of a two-part BBC television series "The Great Train Robbery", in which Biggs was portrayed by actor Jack Gordon.