[1] Blair was born in London, as the daughter of Myer Ogus, a Lithuanian Jewish barber, and Debora "Della" Greenbaum.

[6] In 1963, credited as "Miss X", she recorded "Christine", a tune written by John Barry (under an assumed name) and Leslie Bricusse, which was banned by the BBC at the height of the Profumo scandal but reached no.37 on the UK singles chart.

[7][8] In 1978, she returned to the West End stage in Bar Mitzvah Boy and in 1984 she appeared in The Last Days of Pompeii (1984).

[3] Blair was married three times; first to Edward Lever in 1956; second to Henry Sheridan-Taylor; and third, briefly to an American, with whom she moved to California where she took on television work and did voice-overs.

[4] She was the mother of actress Deborah Sheridan-Taylor, who played Saskia Duncan in EastEnders, and of a son, Adam, who is a photographer.