In the United Kingdom (and elsewhere), there are moves to extend formal ethical review of research involving human subjects beyond the traditional oversight by NHS local or multi-centre research ethics committees of medical or clinical research, to also encompass all ‘non-clinical’ research involving human subjects. This paper describes and analyses the development and implementation of a model for ethical review within the university sector. At Cardiff University, a devolved or two-tiered system of ethics review has been created in which a (...) top-level university research ethics committee provides policy advice to and oversight of school-based research ethics committees that engage in formal ethics review of research conducted in their respective schools. We describe the system and reflect on the challenges and benefits of implementing such a coordinated and comprehensive university-wide system of ethics review. (shrink)