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Team Sky principal Sir Dave Brailsford and coach Tim Kerrison take you inside how they planned and executed Chris Froome's historic victory at the Giro d'Italia.

It astonished cycling, drew in people who may otherwise never care about a bike race, triggered admiration in many, but cynicism in others.

Much has been talked about it in the days since. Now, for the first time, the two men behind the audacious plan answer their critics and take you inside one of sport's greatest comebacks.