Below I have posted images of an interview my colleague and I conducted with this actress at a convention in Northwich who was hailed as having featured in Sherlock and Doctor Who. I cannot recall the name of the woman nor make out what it says on the board that says her name. All I know is she played the alien in the poster (reportedly a Capaldi episode) and "Sherlock's mum" in Sherlock (I guess she was a body double? She's not credited on IMDb that I know of.) If you can help me identify her please do.
File:Cj.png
A screenshot of an interview with the woman in question.
File:Cjalien.png
A close-up of the same image, specifically a picture of the woman in question portraying an alien in Doctor Who.