She also served as the second head of the Crown Prosecution Service, presiding over a staff of 6,000. She worked as Director until her resignation in 1998.
Her six-year stint in this role was not without controversy, coming at a time when public confidence in the organisation was at a low ebb, and Barbara was forced to deflect much criticism. During these years, the CPS was considering the prosecution of 1.4 million cases each year. She tried to increase the efficiency of the CPS and introduced victim impact statements.