This protocol is not an alternative to, nor a substitute for allocation policy. It does not supersede nomination agreements, Common Housing Registers (CHR) and choice-based lettings (CBL) schemes criteria, and policies such as ‘grounds for refusal’ or suitability criteria for certain types of accommodation that have been negotiated locally or sub-regionally. The protocol clarifies and makes consistent the information base that is required to implement an allocation policy, whatever its criteria. Government is keen for all government departments, local government, health authorities and third sector agencies to work together to improve service delivery and information sharing is seen as a key requirement and support.