This circular letter introduces NSI Technical Bulletin No. 0051 which describes changes to the recently published BS 7499:2020. The main requirements introduced by the publication of the 2020 edition of BS 7499. The main reason for the revision and introduction of this security services standard is to update the current format and to remove duplication from other security service sector codes of practice so that organisations that operate in more than one sector adhere to the overarching standard BS 10800, plus the relevant specific standard(s) for their sector, e.g. BS 7499. References and requirements for Mobile patrol have migrated to the newly published code of practice for the keyholding and response services – provision of mobile security services BS 7984 – 3 Implementation timescale for applicant companies. New applicant companies to NSI Guarding Gold and Silver schemes will be audited against BS 7499:2020 with immediate effect and any Improvement Needs recorded against clauses of the Standard will have to be satisfactorily addressed before approval can be granted. Implementation timescale for existing approved companies NSI approved companies will need to be compliant with BS 7499:2020 by the 31st March 2021. To allow companies the necessary time to review and adapt appropriate processes and procedures in order to meet the requirements of BS 7499:2020, NSI will not start auditing to BS 7499:2020 until the 1st October 2020. From that date and until the 31st March 2021, a non-compliance will have an audit note recorded against clauses of the standard. From the 31st March 2021, an Improvement need will be recorded against clauses of the Standard and will have to be satisfactorily addressed before approval can be granted. How do I obtain a copy of BS 7499:2020? BS 7499:2020 is available as an outright individual purchase directly from the BSI (for £182) or at a 12½% discounted price from the NSI or, alternatively, as a download via the NSI approved company Standards on Subscription service. Questions or queries? If you have any questions or queries regarding the implementation of the change, please do not hesitate to contact me.