The psychedelic band Tomorrow (featuring a pre-Yes Steve Howe) has a small, non-musical role, and the score also includes
several sweet songs that Redgrave and Tushingham warble themselves.
In other words, you should ignore that terrible sinking feeling when you hear the first of
several loud clicking noises and continue to slowly pry the bottom cover off; that's the
sweet song of unlatching, not the sound of breaking plastic.