 She attended the Italia Conti Academy of Theatre Arts and during World War II she entertained the troops as a member of ENSA.It was at this time that she met and married her husband, Dr Jimmy Wilson Muggoch, an army doctor from Edinburgh.From 1958 to 1968, Marsden was among the cast of the radio series "Beyond Our Ken" and "Round the Horne", where she played most of the female characters.