SEC Version 5.23 Designated

9 October 2018

On 4th October 2018, the Government confirmed a 5 December 2018 end date for SMETS1 smart meter and advanced meter installations following its consultation earlier this year. Pursuant to Condition 22 (The Smart Energy Code) of the DCC Licence and Section X5 (Incorporation of Certain Documents into this Code) of the SEC, the Secretary of State directs that, with effect from 4th October 2018:


  • The TS Applicability Tables previously designated and incorporated into the SEC as Schedule 11 are hereby re-designated in the form set out in Annex B of the SRO letter.

You can find a copy of the SRO Letter here.

You can download a zip folder containing SEC v5.23 here, or download the individual sections of the SEC from the SEC and Guidance Documents page of our website. The redlined changes to these documents can be downloaded here.

If you have any questions or would like to discuss the changes to the SEC further, please contact the SEC Change Team on 020 7090 7755 or email