This document contains the National Incident Category List (NICL) and the principles, guidance and definitions for the National Standard for Incident Recording (NSIR). NSIR was introduced to replace the wide variety of incident recording (and non-recording) that differed from force to force so that common understanding and recording practices would result in effective data provision and use. NSIR now supports effective recording of over 80% of calls 
for service, ranging from messages to major incidents. 

The NPIA conducted a full review of NSIR in 2009 on behalf of ACPO. This review recommended that NSIR was rationalised and simplified. The NPIA, working closely with the Home Office and Her Majesty’s Inspectorate of Constabulary (HMIC), have moved the focus of NSIR from incident recording to risk 
assessment at the front end of service delivery. This aims to support improved identification and management of risks, threats to safety, vulnerability and repeat victims, particularly in relation to anti-social behaviour (ASB). 

This document was reviewed by the National Standard Assurance Board in September 2021 and was found to be the most up to date document available, still supported by the NPCC