John Worboys is given two life sentences for drugging women with intent to sexually assault them.Read more
John Worboys case
Becki Houlston, believes Worboys drugged her in Bournemouth
BBC Home Affairs Correspondent
The new chairwoman of the Parole Board has said it is a "significant concern" that none of its 240 members is black.
Caroline Corby said just 13 members of the board, which decides the release of the most serious offenders in England and Wales, was from an ethnic minority.
She said "unconscious bias" had affected recruitment for the board.
Mrs Corby replaced Nick Hardwick, who was forced to quit after the High Court overturned the board's decision to free serial sex offender John Worboys.
In her first interview since her appointment, she said the Worboys case had caused a "loss of confidence" among board members.