Explosive Amazon Prime doc Horsepower to lift lid on Oisin Murphy's cocaine ban and tension at Andrew Balding yard

Documentary follows the turmoil that followed after champion jockey Murphy's drugs positive. It also follows trainer Andrew Balding and his stables in Kingsclere. The show has exclusive access to the sport’s young superstar, Oisin Murphy. It's also about the characters, like stable lad Abdul, a Sudanese refugee who made the miraculous journey to England. He has led horses up at Royal Ascot. In episode two he hands in his notice to go back to Africa. His brother died during their escape from militia. They lost their entire family 15 years ago. There are also high-profile owners, such as The Queen and the Qatari Royal family.