He said, "As far as the industry is concerned, rock 'n' roll is very much the ugly cousin. I sort of dig that because it provides a certain sense of rebellion and attitude that was missing. And all the popular so-called heavy metal bands that do make it to radio are so conformist that I can't stand them.

"All the real heavy metal bands, they've been doing the same thing for years and years on the same level, and they keeping putting out music and doing what they do. I like that.

"The quality of commercial music is in the toilet, but the people who do it for real and mean it are still fantastic. They just don't have the outlets they used to have."