<P> Ultimately, complicated negotiations brought Harrison back into the group's activities . At Harrison's insistence, McCartney's plans for a full concert were abandoned and the project was relocated to the band's Apple Studio in Savile Row, with the focus now on merely completing a new album of some of the songs rehearsed at Twickenham . The Beatles gave their last public performance on the rooftop of Apple's headquarters on 30 January 1969, as a substitute for an audience - based concert . </P> <P> Apple Corps during this period was plagued by business problems . On 26 January 1969 Lennon and Ono met with Allen Klein regarding managerial advice . Lennon requested that Klein represent his business interests in the band . McCartney's growing relationship with Linda Eastman, whom he married on 12 March, opened the opportunity for lawyers Lee and John Eastman, Linda's father and brother, respectively, to become involved in advising the band's financial and legal decision - making . In April, after a series of rancorous meetings between Klein, the Eastmans and the Beatles, Klein was appointed as the band's business manager on an interim basis, with the Eastmans as the Beatles' lawyers . However, the band members' quarrels and disharmony over musical matters soon permeated their business discussions . </P> <P> Dick James, who held substantial rights to Northern Songs (the Lennon--McCartney song catalogue), became increasingly concerned over the band's dissension and resentment towards him . Without informing the Beatles, he entertained offers to sell his substantial shareholding in Northern Songs . Klein and the Eastmans were caught off guard and their attempts to reclaim control of the Beatles (via Maclen Music) failed . It soon became evident that the Eastmans and Klein had developed an adversarial relationship given their disparate advice and counsel . Given a choice between Klein and the Eastmans, Harrison and Starr opted for Klein . The Eastmans were dismissed as the Beatles' legal representation, and on 8 May, Lennon, Harrison and Starr signed a contract with Klein to be the band's business manager . This further aggravated the underlying mistrust and antipathy experienced within the band . McCartney felt that the four members' evolution from musicians to businessmen was the central reason for the band's break - up . </P> <P> With the troubled Get Back / Let It Be project put on hold, the group continued to record together sporadically during the spring and early summer of 1969 . Otherwise, the band members became increasingly involved in activities outside the band; among these, Lennon launched an international peace campaign with Ono, spearheaded by their single "Give Peace a Chance", Harrison continued to focus on producing Apple Records signings, including Jackie Lomax, Billy Preston and Radha Krishna Temple (London), and Starr began to establish himself as a film actor . Their occasional sessions together over the first half of the year ultimately paved the way for the Beatles' last studio recording project, Abbey Road . </P>

When did the beatles form and break up