Government Major Projects Portfolio
Projects that will form the Government Major Projects Portfolio from 1st April 2026
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The National Infrastructure and Service Transformation Authority (NISTA) has reduced the size of the Government Major Projects Portfolio (GMPP) from over 200 projects to 81 projects.
From 1st April, to be included in the GMPP, projects must meet the criteria set out in the Treasury Approval Process guidance, and must also meet all of the following requirements:
- support a top government priority;
- have whole-life costs of more than £1 billion; and
- be a project that would benefit most from central support and scrutiny.
In exceptional circumstances, government may add projects to the GMPP where they are of particular strategic importance - such as those that are very high risk or underpin critical national infrastructure - and where NISTA’s support is expected to materially improve delivery confidence.
Projects that are not included in the revised GMPP remain important and continue to be supported and delivered in line with government priorities.
A smaller, more focused GMPP will allow NISTA to target expert advice and assurance where it adds most value, strengthening confidence in the delivery of benefits from government investments. These changes form part of a wider reform programme to speed up delivery, target specialist expertise where it is needed the most, and strengthen departmental accountability for decision‑making.