Del Shannon and Chuck Berry, Saville Theatre, February 1967
Here's some microfilm about Chuck, John, Ringo and Beatles manager Brian Epstein at the Saville Theatre in London back in 1967. (It was curtains for the theater manager who dropped the curtains on Berry before his finale.) You can evidently pay to read more about the tour HERE. Alas, the famous theater, which hosted everybody who was anybody except for ME and YOU was turned into a movie house. You can read more about its ancient history here.