The surviving members of THE Beatles are to release a new single compiled from archive recordings.
The track, called Now And Then, is based on a John Lennon recording given to MCCartney by the late musician's widow Yoko Ono.
Archive tracks from George Harrison will also be woven into the new song, along with vocals from Sir Paul MCCartney and drumming from Ringo Starr, reports British newspaper the Sunday Express.
Elo musician Jeff Lynne, who produced the track's original sessions, says, "The song had a chorus but is almost totally lacking in verses. We did the backing track, a rough go that we really didn't finish.
"It was sort of a bluesy sort of ballad, I suppose, in A minor. It was a very sweet song; I liked it a lot, and I wish we could have finished it."