
ESOS Phase 4 vs Phase 3: Navigating the New Compliance Reality
ESOS Phase 4 vs Phase 3: Navigating the New Compliance Reality Transitioning from energy assessments to mandatory action plan accountability For over a decade, the
Written By Energise 
ESOS Phase 4 vs Phase 3: Navigating the New Compliance Reality Transitioning from energy assessments to mandatory action plan accountability For over a decade, the

Market-wide Half-Hourly Settlement replaces estimated electricity profiling with mandatory half-hourly data by 2026, improving billing accuracy, governance, ESG reporting, and enabling demand-side response, tariff optimisation, and cost-effective carbon reduction strategies.

The UK government’s anticipated review of the Streamlined Energy and Carbon Reporting (SECR) framework was officially published by the Department for Energy Security and Net Zero (DESNZ) in early 2026.