14/06/2011 by Buildington
Around early September 1963 The Beatles moved into Flat L at 57 Green Street, it was the only place in which all four Beatles ever lived together. Word soon spread amongst fans and, with Beatlemania now in full swing, they mounted an almost permanent surveillance outside the front door. John left by the end of November 1963 to live with wife Cynthia and baby Julian in their own flat elsewhere. Paul then moved into the family home of his girlfriend Jane Asher, George and Ringo are then thought to have switched to a different flat in the same Green Street building.
Source: http://homepage.ntlworld.com/carousel/pob/pob41.html