 In November 2005, Marcel joined Holby as Jac Naylor.Prior to this she appeared in over twenty episodes of "The Bill", in which her character, Louise Larson had an affair with Sergeant Dale Smith.It was revealed in the BBC's Annual Report for 2016 that Marcel was one of the BBC's highest-paid stars, with an annual salary for her role in Holby City in the range of £200,000 to £249,000, making her the highest-paid actor on the series.