"The best ideas don't come from the boardroom, the best ideas come from the frontline."

James Timpson is the chief executive of Timpson, a family-run business known for its key cutting and watch repair services. James does business differently. His unconventional leadership style has raised eyebrows - but it works. Since taking over Timpson, he has grown the business to over 2,000 stores by developing new ideas, giving ex-prisoners a second chance and putting his employees first.

He has published a book packed with leadership advice for a happier, healthy workforce. The Happy Index: Lessons in Upside-Down Management is out now.