Collection

DESNZ major projects: business case publications

Business cases for major projects by the Department for Energy Security and Net Zero (DESNZ).

All projects and programmes on the Government Major Projects Portfolio (GMPP) are required to publish a summary business case, full business case, or programme business case within 4 months of receiving HM Treasury approval.

DESNZ major project business cases

Updates to this page

Published 24 October 2025