Richard Roy Douglas was an English composer, pianist and arranger. He worked as musical assistant to Ralph Vaughan Williams, William Walton, and Richard Addinsell, made well-known orchestrations of works such as Les Sylphides and Addinsell's Warsaw Concerto, and wrote a quantity of original music.

The Big Blockade was a 1942 British black-and-white war propaganda film in the style of dramatised documentary. It was directed by Charles Frend and starred Will Hay, Leslie Banks, Michael Redgrave and John Mills. It was produced by Michael Balcon for Ealing Studios, in collaboration with the Ministry of Economic Warfare.