The end to end procurement process for any product involves a number of stages and a number of different units within the Home Office and is carried out in accordance with the relevant legislation and Government procurement guidance. Where, following this process, equipment is centrally procured by the Home Office for use in chemical, biological, radiological or nuclear (CBRN) incidents, such procurement is managed by the Office of Government Commerce (OGC) on behalf of the Counter-Terrorism and Intelligence Directorate of the Home Office.