Great British Insulation Scheme Delivery Guidance
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The Great British Insulation Scheme (GBIS) Delivery guidance and measures table are for suppliers and the supply chain. They provide guidance on GBIS, the latest Energy Company Obligation (ECO) scheme, including:
- how a supplier meets its obligations
- the eligibility of different homes and the households that occupy them
- the eligibility of different energy efficiency measures
- the measure notification processes
- measure scores
- technical and score monitoring
- auditing and counter-fraud processes
See the summary of updates document for summaries of changes between versions of the Delivery Guidance and Measures Table.
You can find other GBIS guidance documents on our Contacts, Guidance and Resources page.
Main document
[Great British Insulation Scheme Delivery Guidance V2.0 [PDF, 2.38MB]
](https://www.ofgem.gov.uk/sites/default/files/2025-08/GBIS%20Delivery%20Guidance%20v2.0.pdf)
Subsidiary documents
[GBIS Measures Table v3.0 [XLSX, 50.29KB]
](https://www.ofgem.gov.uk/sites/default/files/2025-08/GBIS%20Measures%20Table%20v3.0.xlsx)
[Great British Insulation Scheme Delivery Guidance V2.0 and Measures Table Summary of Updates [PDF, 261.71KB]