Sir Paul said he could not "foresee a time when Lennon-McCartney becomes an active songwriting partnership again". But in a new BBC interview, he has said the split was prompted by John Lennon.

The Paul McCartney diss track John Lennon wrote in 1971 also featured another former Beatle, adding salt to the wound.

(Original Caption) Beatle business...Beatles John Lennon (left) and Paul McCartney face the press ... [+] here, May 14th, and announce the establishment of an organization to serve as a catchall ...