The weaknesses in the criminal justice system exposed by these cases led to the establishment of a Royal Commission on Criminal Justice in 1991 . Its mandate included considering whether changes were needed in the arrangements for considering and investigating allegations of miscarriages of justice when appeal rights have been exhausted . Evidence was gathered over a two-year period . The Royal Commission published its report in July 1993 . It concluded ( adopting the view expressed by Sir John May in his inquiry into the Guildford and Woolwich bombings ) that the arrangements for referring cases back to the courts were incompatible with the constitutional separation of judicial and executive powers . The recommendations of the Royal Commission led to the Criminal Appeal Act of 1995 , which established the Criminal Cases Review Commission
Guildford and Woolwich bombings
Guildford pub bombings
Criminal Cases Review Commission