Penelope Lee
From Tardis Wiki, the free Doctor Who reference
Penelope Lee (born 7 November 1938[1]) voiced the computer in the Doctor Who television story Revelation of the Daleks.
On June 25 1963, she had auditioned for the role of "Miss McGovern", intended as one of the original four regulars in the series. Lee was offered the part, which was subsequently renamed Barbara Wright, but turned it down.