United 93 was directed by Paul Greengrass, and was edited by Douglas, Christopher Rouse, and Richard Pearson. The use of three editors for the film was dictated by its short production period, which was less than six months between the start of filming and release of the film. Greengrass and Douglas had worked together quite successfully on the film Bloody Sunday (2002); Greengrass, Rouse, and Pearson had just edited The Bourne Supremacy (2004). Despite the accelerated production schedule for United 93, the editing was very successful. In addition to the BAFTA award, the editors were also nominated for an Academy Award for Film Editing and for an ACE Eddie award. Ellen Feldman has written an analysis of the film's editing.
Douglas' most recent BAFTA television nomination was for editing The Lost Prince (2003), which was written and directed by Stephen Poliakoff; The Lost Prince won a Primetime Emmy Award for Outstanding Miniseries.
Much earlier, Douglas had been nominated twice as best editor for two miniseries based on John le Carré's espionage novels Tinker, Tailor, Soldier, Spy (directed by John Irvin-1979) and Smiley's People, (1982 - directed by Simon Langton). Douglas also edited a third miniseries based on le Carré's novel A Perfect Spy (directed by Peter Smith - 1987).