Rosalyn / Big Boss Man

Wikipedia dates "Rosalyn" to May 8, 1964, and a review blog to June 1964; it reached 41 in the UK in July 1964. The blog says Jimmy Duncan and Bill Farley, the co-manager and the owner of the studio where they recorded, produced it in London; Wikipedia names no producer. May sang lead, Taylor played rhythm guitar, Pendleton slide or lead guitar, Stax bass and Viv Prince drums, over a Bo Diddley beat with maracas. The song is not on the UK debut album but is track two on the North American version. It appears on Nuggets II. A reviewer quoted at starlingdb said it may have been Britain's wildest single for about three months, until "You Really Got Me".