# NSI: Certification for security and fire protection companies

> The UK's top security and fire safety companies are approved by the National Security Inspectorate \(NSI\)\. Look for the NSI Gold \& Silver hallmarks of approval

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## Pages
- [Best Practice for Internal Quality Auditing for BS EN ISO 9001:2015](https://www.nsi.org.uk/approved-companies/training/best-practice-for-internal-quality-auditing-for-electronic-security-organisations/)
- [Design, Installation and Maintenance of CCTV Systems](https://www.nsi.org.uk/approved-companies/training/best-practice-for-the-design-installation-and-maintenance-of-cctv-systems-training/)
- [Design, Installation and Maintenance of Access Control Systems](https://www.nsi.org.uk/approved-companies/training/best-practice-for-the-design-installation-and-maintenance-of-access-control-systems/)
- [Security Screening BS 7858:2019](https://www.nsi.org.uk/approved-companies/training/best-practice-for-security-screening/)
- [Training](https://www.nsi.org.uk/approved-companies/training/)

## Posts
- [NSI New Certifications \- August 2026](https://www.nsi.org.uk/nsi-new-certifications-august-2026/)
- [PSI Magazine \- Meet the NSI Installer September 2026](https://www.nsi.org.uk/psi-magazine-meet-the-nsi-installer-september-2026/)
- [PSI Magazine \- Meet the NSI Installer August 2026](https://www.nsi.org.uk/psi-magazine-meet-the-nsi-installer-august-2026-2/)
- [NSI Re\-certifications \- July 2026](https://www.nsi.org.uk/nsi-re-certifications-july-2026/)
- [Guest Post: Why Third\-Party Certification Matters In Fire](https://www.nsi.org.uk/guest-post-why-third-party-certification-matters-in-fire/)

## Case Studies
- [J \-Tech Systems](https://www.nsi.org.uk/case-study/j-tech-systems/)
- [Smartec Integrated Systems](https://www.nsi.org.uk/case-study/smartec/)
- [Dave Daulby](https://www.nsi.org.uk/case-study/davedaulby/)
- [Ecl\-ips](https://www.nsi.org.uk/case-study/ecl-ips/)
- [Lansafe](https://www.nsi.org.uk/case-study/lansafe/)

## Questions
- [How can I specify a CCTV system?](https://www.nsi.org.uk/question/how-can-i-specify-a-cctv-system/)
- [Why should I choose an NSI approved company?](https://www.nsi.org.uk/question/why-should-i-choose-an-nsi-approved-company-2/)
- [Why has my insurer insisted that I contract with an NSI approved company?](https://www.nsi.org.uk/question/why-has-my-insurer-insisted-that-i-contract-with-an-nsi-approved-company/)
- [What is a Unique Reference Number \(URN\)?](https://www.nsi.org.uk/question/what-is-a-unique-reference-number-urn/)
- [I’ve heard that the traditional telephone line service to my premises will be discontinued in the near future and replaced with IP \(Internet Protocol\) voice services over broadband\. Will this affect my alarm system and what should I do about it?](https://www.nsi.org.uk/question/ive-heard-that-the-traditional-telephone-line-service-to-my-premises-will-be-discontinued-in-the-near-future-and-replaced-with-ip-internet-protocol-voice-services-over-broadband-will-this/)

## Bulletins
- [NSI Bulletin \- Issue 7](https://www.nsi.org.uk/bulletin/the-transported-asset-protection-association-tapa/)
- [NSI Bulletin \- Issue 10](https://www.nsi.org.uk/bulletin/nsi-bulletin-issue-10/)
- [NSI Bulletin \- Issue 9](https://www.nsi.org.uk/bulletin/nsi-bulletin-issue-9/)
- [NSI Bulletin \- Issue 8](https://www.nsi.org.uk/bulletin/nsi-bulletin-issue-8/)
- [NSI Bulletin \- Issue 5](https://www.nsi.org.uk/bulletin/nsi-bulletin-issue-5/)

## Categories
- [News Articles](https://www.nsi.org.uk/category/news-articles/)
- [uncategorized](https://www.nsi.org.uk/category/uncategorized/)

## FAQ Sections
- [Alarm systems](https://www.nsi.org.uk/faqsections/alarm-systems/)
- [FAQs for Applicants \& Approved Companies](https://www.nsi.org.uk/faqsections/faqs-for-applicants-approved-companies/)
- [Training General Questions](https://www.nsi.org.uk/faqsections/training-general-questions/)
- [About alarm monitoring](https://www.nsi.org.uk/faqsections/about-alarm-monitoring/)
- [General questions](https://www.nsi.org.uk/faqsections/general-questions/)

## Optional
- [Sitemap index](https://www.nsi.org.uk/sitemap_index.xml)