Harrison's widow Olivia has revealed the couple's musician son Dhani is working on music his dad left behind following his death in 2001.

"There are a lot of songs that are unfinished," she told Overheard. "I think there’s a project there. I just need time to get to it."

Dhani isn't new to his father's songs - he contributed guitar to some of his father’s solo work when George was alive.