Susan Brown
From Tardis Wiki, the free Doctor Who reference
Susan Brown (born 6 May 1945) is principally a stage actor, but has occasionally appeared in high-profile television projects like A Touch of Frost and Prime Suspect.
To Doctor Who fans, she is perhaps best remembered as having played Bridget Spears in TV: Children of Earth. She also has performed for Big Finish Productions. She voiced the midwife in 100 BC and Mary in Bedtime Story, Eleanor Harvey in Return of the Krotons, Maud the Withered in Castle of Fear, Alice Withers in The Eternal Summer, Mrs Withers/Mrs Sowerby/Computer Voice in Plague of the Daleks, and the Chief Engineer/Chanel in The Song of Megaptera.