Updated the 'summary of standards' and 'notice of standards' to reflect that the Microgeneration Certification Scheme (MCS) changed their version of MCS:2025 to version 2 on 8 September 2026.
Updated to list MCS 007 The Heat Pump Standard Version 8.0 and MIS 3005-D Heat Pump Design Standard Version 3.0; MCS:2025 versions of existing standards; and Home Insulation and Energy Systems Contractors Scheme (HIES) Code of Practice Version S.
Removed the previous version of the approved grant categories and values for the Boiler Upgrade Scheme. The current version should be used from 21 July 2026.
Published Notice of standards and Summary of standards.
Published the approved grant categories and values for the Boiler Upgrade Scheme from 21 July 2026.
Amended details of grant categories and values in the Notice of approved grant categories and values for the Boiler Upgrade Scheme.
Updated to list MCS 007 Product Certification Scheme Requirements: Heat Pumps: version 7, published 24 April 2025; Home Insulation and Energy Systems Contractors Scheme (HIES) Code of Practice Version Q, published 5 March 2025, operational from 1 May 2025.
Updated to list Issue 2 of Microgeneration Installation Standard: MIS 3005-D The Heat Pump Standard (Design).
Added list of grant categories and grant levels approved for the Boiler Upgrade Scheme.
List of standards updated with the approved codes of practice as required by Regulation 4(1)(j).