Richards and collaborator Steve Jordan started the project in 2011 and made a point of doing it at their own pace. And it won't see the light of day until his main band have finished touring, whenever that may be.

Richards tells AP: "I don't want to put it out while the Stones are working. We've got South America lined up in February, then Beunos Aires, Peru. And after that, I know what the tours are like - they tend to get extended."