Multi-Agency Public Protection Arrangements (MAPPA) are a process through which the Police, Probation and Prison Services work together with other agencies to assess and manage the risks posed by individuals convicted of serious violent, sexual and terrorism offences living in the community in order to protect the public. They were established by the Criminal Justice Act 2003 and are operated locally by 42 Strategic Management Boards across England and Wales.
MAPPA are not a statutory body but are a mechanism through which agencies can better discharge their statutory responsibilities and protect the public in a co-ordinated manner by working together, sharing information and joint planning. Agencies at all times retain their full statutory responsibilities and obligations.
Further detailed guidance can be found here