Filming was interrupted on location when leading man Dave Clark complained about the film's costumes to Alexander Jacobs, who was the assistant to the film's producer, David Deutsch. Jacobs was married to the costume designer and reacted to Clark's remarks by punching him in the face. Clark's nose became, for a short time, extremely swollen and he could not be photographed, but he responded well to emergency medical treatment and shooting eventually continued.
The group's Jeep-like vehicle is a 1965 Austin Mini Moke.
According to legend, Dave Clark typically retained control of the film, choosing the writer Peter Nichols, director Sir John Boorman and taking a lead role himself.
One of countless mid-sixties British "rock-and-roll band" movies hoping to replicate the smashing success of the Beatles' 1964 screen debut A Hard Day's Night (1964). This one comes closer to the mark than most.