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Carbon emissions

Asked by Ayoub KhanIndependentDepartment for Energy Security and Net ZeroTabled Answered 20 October 2025UIN 82620

The question

To ask the Secretary of State for Energy Security and Net Zero, whether his Department's initial projections of the annual financial and emissions savings to be made through the Energy Company Obligation and Great British Insulation Scheme will be achieved.

Answered by Martin McCluskey

Scheme impact assessments included annual bill savings targets of £224.3m for ECO4 and £55.99m for GBIS.

Evaluations of ECO4 and GBIS are underway, including household surveys about energy consumption and bills savings. Evaluation reports will be published in 2026 (ECO4) and 2027 (GBIS). Following completion of ECO4 and GBIS, analysis will be carried out using gas and electricity meter data to assess energy and carbon savings. The official statistics provide ongoing estimates of annual bill savings.

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