Short intro to a talk he gave at this year's Cannes advertising festival...
His key lessons: be confident (too many people believe they are uncreative, when we all can be), take time to practice (like languages, creativity isn't an automatic talent) and remember that it's never too late.
Reminded me of something a musician friend of mine once said. He has had a lot of experience working with, and leading amateur choirs. His view: apart from the very small minority who are genuinely (clinically?) tone deaf, anyone can be taught to sing - just takes confidence and practice (again).
Which is pretty much what Gareth Malone has always said as well.