Prison Reform Trust - carry out research, campaign for prison reform, and provide information and resources to the public and prisoners.

Howard League for penal reform - carries out research, lobbies Parliament, and campaigns for prison reform.

CLINKS - the national umbrella body for organisations that work with prisoners, at prisons and with probation services.

Inquest - campaigns against deaths in custody, and offers free advice to bereaved families and friends, lawyers, policy-makers and the public.

CSAN (Caritas Social Action Network)an agency of the Catholic Bishops’ Conference of England and Wales, and an independent charity. CSAN works to support poor, vulnerable and marginalised people to find their voice and to enable them to improve their lives.