Delia Derbyshire - the woman behind Doctor Who theme
Delia Derbyshire is best known as the uncredited creator of the Doctor Who theme tune.
A sonic innovator in the BBC Radiophonic Workshop, she received very little acclaim during her lifetime but her reputation has grown since her death in 2001.
Robin Warren, a reporter for Radio 4's The World Tonight, went along to the third annual Delia Derbyshire Day to celebrate her pioneering legacy.