A superbly atmospheric John Barry score effectively conveyed the mood of swinging London for this 1965 film by Richard Lester. Usually playing around with variations of the haunting main theme, Barry used vivacious horns, melancholic strings, and above all a groovy jazz organ (played by Alan Haven). A couple of the tracks don't work well in isolation: the vaudevillian "Something's Up!," and the vocal version of the main theme (not used in the film) by mediocre singer Johnny De Little. But overall, it's got a consistently captivating groove, rating as one of Barry's best scores.
AllMusic Review by Richie Unterberger