In addition to our look at the British charts for July of 1964, we feature "Rock and Roll Musicals".     From "Jailhouse Rock" to "Summer Holiday", "It's Trad Dad (aka Ring-a-Ding-Rhythm)", through to "A Hard Day's Night" and "Ferry Cross the Mersey".    Hint:    A certain Beatles song ENTERS the chart at number three.    All this, and more Do-Wah-Diddy than you can Diddy-Dum-Diddy-Do to.  #madeonZencastr