The Post Office campaigner, Sir Alan Bates, has said that he hopes the "real baddies" involved in the IT scandal are held to account.
Sir Alan said that "many" people had "dropped the ball" on the matter, including government figures and senior executives.
The official inquiry into the wrongful prosecution of hundreds of sub-postmasters after faulty Horizon software said money was missing from their Post Office branch accounts will hear closing statements from lawyers this week.
Sir Alan added that he hopes the inquiry's chair, Sir Wyn Williams, would "name names in this one".