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Transparency · Major projects

Strategic Sites Accelerator (SSA)

DBT · DBT_0296_2526-Q2

Department page: Department for Business, Innovation, Science and Trade

Data as atRatingEnd dateWhole-life cost
March 2026Amber (NISTA's independent assessment)Low: 30/03/2030, Mid: 30/03/2030The GMPP project is still at the planning stage (Pre-SOC or equivalent) and is not yet in a position to provide cost/schedule information

Each year’s cost is shown with its price basis. Costs are not compared between years: the March 2024 and March 2025 reports state no price basis, and from March 2026 costs are in 2024/25 prices.

The department’s commentary

This is the department’s own commentary. It may use different prices from the table above, so its figures may not match.

March 2026

Rating: The Delivery Confidence Asssessment rating remains AMBER. Independent assurance concluded that the programme is well developed, with a clear strategic rationale, commercial model and delivery approach. While the programme is progressing well, it remains subject to final HM Treasury approval and has not yet been fully mobilised, meaning some delivery arrangements are still being finalised.

Schedule: Schedule remains the same.

Cost: The GMPP project is still at the planning stage (Pre-SOC or equivalent) and is not yet in a position to provide cost/schedule information

Source: NISTA Major Projects Annual Report 2025-26 (data)

Names, figures, dates, ratings and commentary are as the department reported them. Where a rating, cost or date is withheld, the file’s wording is shown. Every major project →