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The Green Book 2026: updates following the 2025 review

calendar_today February 26, 2026 person Simon Webster domain data-london-gov-uk

Public investment decisions across the United Kingdom are underpinned by HM Treasury’s Green Book, the government’s guidance on appraisal. In January 2025 the Chancellor announced a review of the Green Book and how it is being applied in practice. The review culminated in the publication of Green…

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