Yoko Ono has apologised to Paul McCartney for implying that his songwriting skills aren't up to scratch.

While accepting an award on behalf of Lennon in October, she revealed that he sometimes used to ask her why "they always cover Paul's songs and never mine".

"I said, 'You're a good songwriter, it's not June with spoon that you write'," Yoko revealed.

Now regretting her comments, Yoko has written a letter to Rolling Stone to explain herself.

"I certainly did not mean to hurt Paul, and if I did, I am very sorry," she said.