In August 1963 The Beatles returned to the Cavern to play what proved to be their last gig there. It proved a chaotic event with frequent power-cuts causing frequent interruptions. During one of the forced intervals, Paul McCartney calmed the crowd by playing impromptu acoustic version of an old favourite.
John Lennon never showed much affection for The Beatles most celebrated album. Was this because the Sergeant Pepper concept was Paul's? Not according to what John says in this interview, recorded in 1971, at the height of his feud with his former song-writing partner: