Transparency data

Boiler Upgrade Scheme (BUS) Extension: summary business case

This summary business case supports the case for investment in extending the Boiler Upgrade Scheme (BUS) to 2029/30.

• From: Department for Energy Security and Net Zero
• Published: 8 May 2026

Applies to England and Wales

Documents

Boiler Upgrade Scheme: summary business case

PDF, 327 KB, 22 pages

Details

From 11 June 2025, all projects and programmes on the Government Major Projects Portfolio (GMPP) are required to publish a summary business case, Full Business Case (FBC), or Programme Business Case within four months of receiving HM Treasury approval. This is to provide greater transparency on how HMG business cases are developed and how decisions are made.

Published 8 May 2026