UK officials announced that the Government Major Projects Portfolio (GMPP) will be refocused from over 200 projects to about 80 effective 1 April 2026. The change is part of the National Infrastructure and Service Transformation Authority’s (NISTA) effort to provide more targeted support to the nation’s most complex, high‑risk, and strategically significant projects. To qualify for the refreshed portfolio, projects must receive Treasury approval, support a top government priority, have whole‑life costs above £1 billion, and be judged to benefit most from focused central oversight. Projects outside the GMPP will still be subject to Treasury scrutiny and departmental assurance. The policy also defines “mega projects” as programmes costing over £10 billion and taking longer than ten years to deliver.
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