On November 2, 2023, The Beatles released the single, “Now and Then,” their first new music since “Real Love” appeared on their Anthology 2 compilation in 1996. The core of the song—three distinct verses and a chorus written and sung by John Lennon on a 1977 demo—is not new at all. However, much of the released version of the song does contain entirely new recorded material. Paul McCartney added piano, bass, vocals, and a George Harrison-esque slide guitar solo, Ringo Starr provided the song with a drum part, and McCartney and co-producer Giles Martin (son of Beatles producer George Martin) created a string arrangement.
In 1995, the remaining Beatles began work on a finished version of the song that was intended to join “Real Love” and “Free as a Bird” (from the same demo cassette that “Now and Then” was on) on their Anthology project. At that stage, Harrison added electric and acoustic guitar parts, which are included in the final 2023 version. Even though McCartney and Starr were the lone surviving Beatles when much of the song was put together, “Now and Then” has the feel of a true collaborative effort with a coherent sound.
Source: Al Melchior/americansongwriter.com