English actress who has appeared in the television shows Ever Decreasing Circles and Doctor Who. She began playing Isobel Crawley in Downton Abbey in 2010.
She attended a convent school with her sisters, Rosemary and Linda, in Newcastle upon Tyne before starring in stage productions.
She has been nominated for over four Olivier Awards.
She was married twice and had a daughter named Alice.
She was married to Ian Holm from 1991 until 2001.