--- - |2+ Abstract Background Mentally disordered offenders may suffer discrimination on the basis of mental disorder, or on the basis of being offenders, or both. Aims The aim of this paper is to outline a framework for examining discrimination affecting mentally disordered offenders. It is argued that there should be systematic comparisons between offenders with mental disorder and nonoffenders with mental disorder in order to identify and characterise specific failures to ensure equivalence of mental health care; and systematic comparisons between offenders with mental disorder and offenders without mental disorder in order to identify how mental disorder may constitute a barrier to forms of support and constructive intervention available to other offenders. Methods A critical review was conducted of official documents presenting criminal justice and mental health policy for England and Wales, principally since 2012, together with reports of inspectorate and oversight bodies and relevant research studies. Findings There is evidence that offenders with mental disorder may not be able to access mental health care equivalent to that for nonoffenders with mental disorder. There is also evidence that they may not be able to access interventions available to other offenders. Further disadvantage may arise in the criminal courts since, in England and Wales, if inpatient care is required, the powers of criminal courts to effect hospital admission under Part III of mental health legislation are weakened by the statutory requirement of information that places are available. This is discriminatory against offenders with mental disorder insofar as forms of court disposal for other offenders are not prevented by the capacity of criminal justice agencies. Conclusions and implications The review supports the need for systematic comparisons to identify forms of disadvantage and discrimination experienced by mentally disordered offenders in relation to both mental health and criminal justice policies services. - 'Criminal Behaviour and Mental Health, Volume 29, Issue 4, Page 247-255, August 2019. '