In a 2018 documentary Billy said he felt his life was “slipping away”.
Now focusing on drawing and painting, where his artwork sells for thousands of pounds, he spoke some words of encouragement, hoping to inspire young people to do what they enjoy in life.
“I hope little schoolboys and school leavers are watching me doing these things and see, you can do what you like. You can write plays. You can write songs. You can be funny on stage and play the banjo. You can do drawings.
“Nobody came along with a magic wand and said, you’re allowed to do that now.
“You just have to do it and stretch yourself.”
Asked if he has any regrets, Sir Billy said: “I have no regrets at all – absolutely none.”