Actor Karen Henthorn. Crime Drama's, Soaps and stage acting Frontline Chat

Karen Henthorn is an incredibly versatile actor who has appeared in numerous dramas, soaps such as Coronation Street and Eastenders, and series including Silent Witness, Casualty, Heartbeat, Holby City, The Bill and Shameless.  She also teaches screen acting at Italia Conti Academy.  What's her favourite role and why?  What, and how were her experiences in War Horse?