In his 30's, Ash worked as a charge nurse at Holby City A+E. He left to teach at a local college after he was acquitted of physically attacking a racist patient, but returned briefly in series ten to marry Laura, a PR officer in the hospital.
In the intervening years Ash retrained as a doctor, eventually passing his exams and becoming a Consultant. Ash and Zoe have differing management styles, but they soon bond in support of each other.
Although his marriage didn't last Ash has a daughter, Ella. Now she's a teenager, Ash has put his foot down with her, but she still remains a rebellious and challenging presence in his life and the ED.
(Source: BBC)