Thursday 18 April 2019

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The National Security Inspectorate (NSI) is recognised as the leading certification body for the security and fire protection sectors in the UK. For over 40 years, we have helped protect businesses and homeowners by providing robust, high quality audits of home and business security and fire safety service providers. Businesses and homeowners who choose NSI approved companies have the reassurance that their chosen contractors will work to the highest industry standards demanded by the Police, Fire and Rescue Services and the insurance industry. The NSI Directory lists all the companies who have successfully achieved NSI certification.


The NSI story began in 1971 with the formation of the National Supervisory Council for Intruder Alarms (NSCIA). This was created to deal with the problem of poor quality equipment and ‘cowboys’ within the intruder alarm market.

20 years later, the National Approval Council for Security Systems (NACOSS) was formed from the merger of NSCIA and the Security Systems Inspectorate (SSI). Its role was to continue to improve standards in line with increasingly tougher requirements of the insurance sector and the police national alarms policy.

NACOSS was instrumental in improving standards in the security industry, achieving widespread recognition from insurers, police and security buyers. CCTV and access control systems were added to the portfolio covered by NACOSS.

The Inspectorate of the Security Industry (ISI) was formed in 1992 to offer a voluntary inspection regime for the security guard sector.
In 2001, ISI and NACOSS merged to create a unified inspectorate – the NSI, covering all elements of the security industry, with the goal of creating one definitive certification body for the benefit of customers and suppliers.

NSI has extended its expertise into fire protection systems, helping to develop the  BAFE Fire Protection Industry Modular Scheme SP203 for companies involved in the design, installation, commissioning and maintenance of fire detection and alarm systems.

In 2006, NSI was appointed as an Assessing Body for the Security Industry Authority (SIA) Approved Contractors Scheme (ACS).


In 2001, NSI extended its scope into the fire detection and alarm systems sector to include the BAFE SP203 scheme.  Many security companies already installed fire detection systems, so extending our skills to inspect companies who design, install, commission and maintain these systems was a logical step.  We can also approve companies involved in the maintenance of portable fire extinguishers to the BAFE SP101 scheme –  Contract Maintenance of Fire Extinguishers.

We recently added Emergency Lighting Schemes to our fire portfolio, auditing against SP203-4.

Following a rigorous training regime, we now have a team of auditors fully qualified to undertake the inspection of Fire Risk Assessors against the new BAFE SP 205 Life Safety Fire Risk Assessment Scheme launched on 30 May 2012.

Facilities Management

We recently introduced Facilities Management audits following a successful application to the United Kingdom Accreditation Service (UKAS).  Many security companies work with partners to provide an integrated FM package to their clients, while others now offer FM services in-house. Either way, NSI now has the ability to provide UKAS approved audits across the facilities management spectrum.

Whether you operate or require solutions in one or several of the disciplines above, NSI has a package to benefit you.