I am delighted to join Doctor Who and to be working with this incredible team. Ms Delphox is a great character and someone I've had a lot of fun playing.

'Upstairs Downstairs' and 'Downton Abbey' appeal to people because they're about our history, they look so beautiful, are written by amazing writers and have high production values.

I think if you do a lot of interviews, you're laying yourself open. If you put yourself out, accept every invitation to every premiere, then you can't really complain when people knock on your front door and photograph you in the street.

I am delighted to join Doctor Who and to be working with this incredible team. Ms Delphox is a great character and someone I've had a lot of fun playing.

There's nowhere to hide in the theatre. You can't be the one in rehearsal who doesn't know their lines.

I'm a mother of three children, and we do make mistakes.

I've never seen an episode of Downton Abbey.