Henrietta Diana Primrose Longstaff Branford(12 January 1946 – 23 April 1999) was an English author of children's books.
Her greatest success was Fire, Bed and Bone (1997), a historical novel set during the English peasants' revolt of 1381.
For that she won the Guardian Children's Fiction Prize, a once-in-a-lifetime book award judged by a panel of British children's writers, and she was a highly commended runner up for the Carnegie Medal from the Library Association, recognising the year's best children's book by a British subject.