Written Question·Treasury·UIN 102214
Infrastructure: Cost Benefit Analysis
Tabled: 2 January 2026
Answered: 12 January 2026
Question
Callum Anderson
Labour — Buckingham and Bletchley
To ask the Chancellor of the Exchequer, what assessment she has made of how changes to the discount rate methodology might affect the appraisal of major infrastructure projects in different UK regions.
Answer
James MurrayThe independent review of the Green Book discount rate will be published in the summer 2026. Changes to the Green Book discount rate methodology will affect the appraisal of major infrastructure projects that involve benefits and costs well into the futur...
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