By the late 1960s, George Harrison was ready to leave The Beatles and go off alone. Not only did he feel creatively stifled by Paul McCartney and John Lennon, but he was also fed up with the band’s business side. He wrote a few songs to air out his grievances, and one song he referred to as a ‘piss-take.’
“Only a Northern Song” is a Beatles track written by George Harrison that debuted on 1969’s Yellow Submarine soundtrack. The lyrics consist of Harrison sharing his discontent with The Beatles’ publishing company as he says none of the chords he’s playing or lyrics he’s singing matter since it’s “only a Northern song.”
In a 1999 Billboard interview (shared via Rolling Stone), Harrison wrote the song as a “piss-take” after realizing he owned none of his music and the business profits more from his work than he does.
Source: Ross Tanenbaum/cheatsheet.com