 She was a sister of Rhoda Power, the children's writer and broadcaster, and Beryl Millicent Le Poer Power, a civil servant (1891-1974).When she was three her father, a stockbroker, was arrested for fraud and the family moved to Bournemouth to live with Benson Clegg (Power's grandfather).After her mother died of tuberculosis when Power was only 14, she moved to Oxford with her two sisters to live with her aunt.