In an interview with Jonathan Ross, Paul McCartney reflects on his turbulent relationship with fellow Beatle John Lennon, who was murdered in 1980.

McCartney, who fell out with Lennon as the Fab Four split in 1969, feels that it was all down to business rather than a fault in their friendship.

He said: "There was a big business thing and everything got very sour and then that kind of just got boring and I would just ring John and eventually it just got friendly again… So now he had a baby and I was bringing up babies so we could talk about that. 

"You could talk about normal stuff so it got very nice and I said, to this day, I'm so glad because it would have been the worst thing in the world to have this great relationship that then soured and he gets killed, so there was some solace in the fact that we got back together.

"We were good friends," he added.

McCartney said he likes seeing pictures of them smiling and writing songs together. "The story about the break up, it's true but it's not the main bit, the main bit was the affection."

McCartney said that he was shocked to hear about John Lennon's death and thought of his killer, Mark Chapman, as the "jerk of all jerks".

"I was at home and I got a phone call. It was early in the morning, I was in the country and I just got a phone call and it was like . . .

"It was just so horrific, you couldn't take it in and I couldn't take it in and I just for days couldn't think that he was gone . . . It was just a huge shock."

He continued: "For me it was just so sad that I wasn't going to see him again and we weren't going to hang out and for me the biggest thing was that the guy who has took his life . . . The phrase kept coming in my head 'The jerk of all jerks'.

"It was just like 'this is just a jerk, this is not even a guy politically motivated, it's just some total random thing.'"

The Jonathan Ross Show airs tonight (December 6) on UTV at 10.35pm.