On September 17, 2026, Department for Energy Security and Net Zero (DESNZ) published Consultation interim response - Smart Secure Electricity Systems (SSES). The UK revised the proposed implementation date for in-scope electrical heating appliances and announced alternative routes for metering and cybersecurity compliance.

EU MID may be deemed equivalent and EN 18031-3:2024 may be accepted alongside ETSI EN 303 645.

Status and timing: Interim response. Subject to final regulations and parliamentary approval; proposed EHA implementation is October 31, 2028 or two years after regulations are made, whichever is later.

Impact

Impact assessment: High.

Key reasons: The response materially alters compliance planning for connected smart devices. On September 17, 2026, Department for Energy Security and Net Zero (DESNZ) published Consultation interim response; Smart Secure Electricity Systems (SSES). The UK revised the proposed implementation date for in-scope electrical heating appliances and announced alternative routes for metering and cybersecurity compliance.

Who is affected?

Smart device manufacturers, importers and distributors, conformity assessment bodies, cybersecurity laboratories.

Conclusion:

Manufacturers should compare MID, EN 18031-3, and ETSI EN 303 645, and maintain flexibility until the final regulation is published.