Security guarding services

Security guarding services

Security guarding services

Security guarding services

For further information or to apply

If you are interested in gaining NSI approval please complete our online Enquiry Form:

If you have any questions, please contact our applications team who will be happy to help.

T: 01628 764885

Event stewarding and security guards covered under NSI's guarding gold

NSI approval options

Guarding Gold

NSI’s premier security guarding services scheme is designed for companies who meet the industry’s highest technical standards and maintain a commitment to continual improvement with an ISO 9001 Quality Management System.

Guarding Silver

NSI's Guarding Silver scheme is designed as a stepping stone towards Guarding Gold.

It requires companies to meet the same high level of technical competence as the Guarding Gold scheme.


Scheme overview

NSI Guarding approval is a compliance-driven scheme which appeals to the elite in the security services sector. It is built on British Standards and NSI Codes of Practice, which compliant companies adhere to. They are amongst the best providers of private security services in the United Kingdom. 

Creating and operating a 24/7 security service to manage any and every eventuality – with trained, capable staff, and infrastructure – demands that service providers have the knowhow, dedication and culture to deliver a guarding service of the highest standard. 

The majority of NSI Guarding approved companies combine their NSI approval with SIA ACS via the NSI Passport scheme.  

For the security expertise you require search: ‘Find an NSI approved company


Our scheme covers a wide range of areas
within the Security Guarding, Cash and Specialist Services sectors and involves compliance with British Standards and NSI Codes of Practice. The security guarding services are detailed below:

BS EN ISO 9001 Quality Management System Requirements

ISO 9001 is the most well recognised and adopted management system worldwide, it is a cornerstone of NSI Gold approval. (NSI Gold approval only).

NSI/SIA ACS Passport

Static Guarding Security Services

BS 10800 and BS 7499

Mobile Security Services

BS 10800 and BS 7984-3

Keyholding and Response Services

BS 7984-1

Provision of Retail Security Services

BS 10800, BS 7499 and NCP 101

Door Supervision Services

BS 7960

Event Stewarding

BS 10800 and BS 8406

Close Protection

BS 8507-1 and BS 8507-2

Closed Circuit Television (CCTV) - Management and Operation

BS 7958

Security Dogs

BS 8517-1 and BS 8517-2

Lone Worker Response Services

BS 7984-2

Provision of Control Room Services

NCP 107

Low Value Cash Collection, Counting & Banking Services

NCP 117

Customer Service

BS 8477

Approval through an NSI scheme proves that you consistently meet the highest standards, including the relevant British Standards, reinforcing the reliability of your company.

Differentiate your business and brand awareness amongst buyers and specifiers.

Feature your business in the NSI Company Finder.

If you are interested in approval for technical surveillance countermeasures, real-time counter eavesdropping detection, lone worker device services, security screening or the provision of labour in the security and events sectors see our Specialist Services page. 

Approval by NSI requires inspection to recognised British Standards/Codes of Practice. Before an inspection for approval can take place, companies should ensure they have a copy of the appropriate Standard.

Relevant British Standards and International Standards are available to NSI approved companies and applicants through our Online Standards Subscription Service or hard copies and electronic copies can be purchased through NSI at a preferential rate.

SIA Approved Contractor Scheme (ACS) Passport Route

NSI is able to provide a route to ACS approval through our Passport Scheme. Find out more about SIA ACS approval.

NSI approved companies providing services for Security Guarding, CCTV, Door Supervision, Keyholding, Close Protection, Cash and Valuables in Transit services and Vehicle Immobilisation (N.I.) may choose the Passport option.

SIA approved contractor scheme logo

Passport Route

If you are interested in gaining both NSI and ACS approval in one integrated audit find out more about our combined Passport Route or contact our Applications Team. The Passport Route is open to existing and applicant companies. 

Passport offers qualifying companies the additional option to gain ACS approval by meeting NSI Passport specification requirements. They then avoid the cost of separate assessments.


To apply for NSI approval, please complete our online Enquiry Form

View all NSI approval schemes