A teenager drug dealer has turned his life around and is now studying for a degree in business management at university, a court has heard. Yagub Digane was just 18 when sold heroin and crack cocaine to a policeman who was working undercover in a Cardiff community. His barrister urged a judge to take the “very exceptional” step of not sending him straight to prison and allowing him to continue turning his life around. Cardiff Crown Court heard that in late 2019 and early 2020 police were conducting a covert operation targeting drug supply in the Butetown area of the capital. Byron Broadstock, prosecuting, said on two occasions Digane sold…