One of few movies to have been filmed inside the legendary Hammersmith 'Palais de Danse', opened in 1919 and demolished in 2012. It was replaced by flats. Until the closure in 2007, it had hosted every genre of music from Adelaide Hall, many dance orchestras, The Beatles, The Rolling Stones, David Bowie to The Fall and many, many others. The site is now marked by a plaque.
This was filmed in SpectaScope, a short-lived British attempt to emulate Hollywood's CinemaScope. Broadly half the size (four perforations to eight American) the film was enlarged for projection, giving a less-than-crisp image.