Great British Insulation Scheme Supplier Data Dictionary
Share the page
This document provides information to assist suppliers in completing the Great British Insulation Scheme measure notification template. It contains a description of every field on the template, the acceptable data that may be entered in those fields and the circumstances under which this data should be included. Suppliers should only use the most recent version of the dictionary and template unless instructed otherwise. Also included is a blank notification template.
A list of changes in each version of the dictionary document is found in the summary of updates published below.
Main document
[Great British Insulation Scheme Supplier Data Dictionary V2.0 [PDF, 242.57KB]
](https://www.ofgem.gov.uk/sites/default/files/2025-08/GBIS%20Supplier%20Data%20Dictionary%20v2.0.pdf)
Subsidiary documents
[Measure Notification Template V1.0 [XLSX, 12.88KB]
](https://www.ofgem.gov.uk/sites/default/files/2023-08/Measure%20Notification%20Template%20v1.0.xlsx)
[Summary of updates to Great British Insulation Scheme Supplier Data Dictionary V2.0 [PDF, 128.11KB]