In the early summer of 1968, Paul McCartney telephoned esteemed war photographer Don McCullin to ask him to spend a day photographing The Beatles. The group was in need of new publicity images, and wanted to get away from the recording studio temporarily.
The chosen day was July 28, 1968. The Beatles and McCullin were joined by five others with cameras – Ronald Fitzgibbon, Stephen Goldblatt, Tom Murray, Tony Bramwell and Mal Evans – plus Yoko Ono, McCartney’s girlfriend Francie Schwartz, and Gary Evans, Mal’s six-year-old son.
There were seven key locations around London in what became known as the Mad Day Out.
Via Beatles Bible