<P> The pub shown in the film known as the "Slaughtered Lamb" was actually a cottage located in Crickadarn, and the interior scenes were filmed in the Black Swan, Old Lane, Martyrs Green in Surrey . </P> <P> An American Werewolf in London was the first film allowed to shoot in Piccadilly Circus in 15 years . Landis accomplished this by inviting 300 members of London's Metropolitan Police Service to a screening of his then - newly released film The Blues Brothers . The police were so impressed by his work that they granted the production a two - night filming permit between the hours of 1 and 4am . Traffic was stopped only 3 times for 2 - minute increments to film the automobile stunts involving the double - decker bus . </P> <P> The film's ironically upbeat soundtrack consists of songs which refer to the moon . Bobby Vinton's slow and soothing version of "Blue Moon" plays during the opening credits, Van Morrison's "Moondance" as David and Alex make love for the first time, Creedence Clearwater Revival's "Bad Moon Rising" as David nears the moment of changing to the werewolf, a soft, bittersweet ballad version of "Blue Moon" by Sam Cooke during the agonizing wolf transformation and the Marcels' doo - wop version of "Blue Moon" over the end credits . </P> <P> The score was composed and conducted by Elmer Bernstein and recorded at Olympic Studios in London, engineered by Keith Grant . Bernstein's score can be heard during David's nightmares, when Dr. Hirsch drives through the moors to East Proctor, and when Alex confronts David in the alley . Though Bernstein wrote and recorded music to accompany the transformation scene, the director chose not to use it . The three - minute passage was eventually released by Bernstein under the title "Metamorphosis". </P>

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