Author Philippa Gregory examines the stories of Edward IV's queen consort Elizabeth Woodville and her rivals Margaret Beaufort and Anne Neville, who inspired her series of novels The Cousins' War and the recent adaptation on BBC One. The three lived through the treason and bloodshed of the Wars of the Roses in the 15th century and Gregory reveals why the loyalties, rebellions, plots and betrayals of these women were decisive in shaping the history of England.