The NSI - National Security Inspectorate - is the specialist approvals and certification body that inspects companies who provide business and home security, and fire safety services. Contractors approved by the NSI are assured to work at the highest recognised industry standards, which are demanded by Police, Fire and Rescue Services and the insurance industry. A UKAS accredited certification body, the NSI approves only those companies who provide quality solutions within the security and fire sectors, which include fire detection and alarm systems, manned security and keyholding services, intruder alarms, burglar alarms, access control and cctv.