DESNZ – Consultation on DCC User Interface Specification, the Message Mapping Catalogue and the Technical Specification Applicability Tables and upon the date of their incorporation into the SEC And the date of incorporation of the Communications Hub Technical Specification Version 1.7 and the GB Companion Specification Version 4.4.

DESNZ has today, 16 September 2025, published a consultation on Virtual WAN related changes to a number of technical SEC documents intended to be incorporated into the SEC as part of the November 2025 SEC Release. In the case of the DCC User Interface Specification, additional changes to the document will also be made via SEC modifications as part of the release.

The consultation and Annex 1 can be found here.

Annexes 2, 3, 4, and 5, can be found here, here, here and here respectively.

Responses should be submitted to smartmetering@energysecurity.gov.uk  by 17:00 on 24 October 2025.