It has been well documented recently that JLC struggled to get any acting work after Emmerdale - despite audition after audtion after audtion. It was only after being cast in one of the three (Titanic/Dancing/Room) that the others followed.
God knows why - perhaps the preconception of a Soap background - because she's a cracking actress.
I always thought she was good in Waterloo Road I know it's not RADA acting but telling the story of a girl being abused by her father then murdering him was a really good WR story. I always thought it was funny her character was best friends with Daisy from Downton. I hope she gets actual acting working at the same time as DW otherwise she will be the Doctors companion and nothing else