Britain Changed the Maths to Get Infrastructure Moving
Synopsis
Britain is changing infrastructure approval rules by cutting the Green Book discount rate from 3.5% to 3%. The Treasury is also testing area-based project assessments.
Britain's infrastructure approval process is getting a makeover, after the Treasury decided to decrease the value for assessing future benefits for public projects.
The government's Green Book, which includes the standard discount rate on costs and benefits for public projects, would see the figure reduced by 0.5% for projects in infrastructure, when making decisions.
A Lower Rate for Long-Term Projects
The Infrastructure approval rules changes in Britain will apply to transport, housing, and social infrastructure.
The Treasury is also testing an alternative approach to projects by considering the potential of large-scale areas, rather than individual schemes. Plymouth to Liverpool, Birmingham to Port Talbot are the pilot areas.
The government will be providing more details, including responses to the independent discount-rate review, at the Budget on October 28.
The move comes after the publication of the Green Book Review 2025: One Year On, which recommended that the headline rate should be reduced from 3.5% to 3%.
An independent review of the Green Book's discount rates was undertaken in 2025 by Professors Ben Groom and Mark Freeman.
The Green Book previously included a schedule where a 3.5 percent discount rate applied to the first 30 years, decreasing to 3 percent for years 31-75 and 2.5 percent for years 76 and beyond.
Infrastructure Investment Already Rising
According to the latest ONS (Office for National Statistics) report, 'Infrastructure in the UK, Investment and Net Stocks: July 2026,' the value of infrastructure investment stood at £31.3 billion in July 2026 (2023 prices).
This reflects an increase of 12.1 percent compared to the same period in 2024. Energy investments saw the largest rise, up by 19.9 percent to £18.8 billion.
The ONS also reported that the value of net stocks of market-sector infrastructure amounted to £506.7 billion in 2025, up by 3.1 percent compared to 2024.
The figure covers investment in energy, water, telecom, transport-related activities, extractive industries, and waste management.
Britain's infrastructure approval process changes come as the government's wider infrastructure policy promotes a 10-year infrastructure plan, which was published in 2025.
It is set to deliver a long-term vision for future infrastructure needs, with a commitment to secure £725 billion for the maintenance and development of large-scale projects during the period.
Changes to Infrastructure Approval Procedures in Britain within the Broader Policy Framework for Infrastructure Investment
The changes to the infrastructure approval procedures in Britain fit into the broader policy framework for infrastructure investment, which supports the country's strategic economic growth and sustainable development objectives.
At the same time, the government is operating within the context of challenging investment conditions both within the UK and at the international level.
The UK's investment rate for the entire economy in the first quarter of 2026 came to 18.9 percent, the lowest among the G7 countries, according to the ONS data, which compiles statistics from the OECD (Organization for Economic Co-operation and Development).
The comparison includes Canada, France, Germany, Italy, Japan, the UK, and the US, with economy-wide business and public investments, with the exception of infrastructure, factored into the figures.
Source: Reuters
Pooja Malik is a business journalist with over six years of experience covering startups, entrepreneurship, and emerging trends. She has previously worked with leading media platforms such as YourStory Media and BW BusinessWorld, where she reported on business, policy, and market developments. Currently, she serves as Editor at The Inspirepreneur Magazine, where she writes and edits stories across business, lifestyle, and travel, with a focus on clarity, accuracy, and reader relevance.
