Natural capital as critical national infrastructure: implications for UK engineers
Reviewed by Tom Sullivan

First reported on New Civil Engineer
30 Second Briefing
A coalition of UK environmental professionals is calling for natural capital – including rivers, wetlands, soils and urban green space – to be formally designated as critical national infrastructure (CNI). The group argues that assets providing flood attenuation, coastal protection and urban cooling deliver system-level resilience comparable to power, water and transport networks, and should therefore receive similar statutory protection and long-term funding. For civil and geotechnical engineers, this would push nature-based solutions such as floodplains, saltmarsh and sustainable drainage systems further into core infrastructure planning and asset management.
Technical Brief
- Formal CNI designation would trigger mandatory long‑term asset management plans for key natural systems.
- For designers, CNI status could hard‑wire nature‑based assets into option appraisal and whole‑life cost models.
Our Take
Within our Policy coverage, UK-focused sustainability pieces increasingly link natural capital to hard infrastructure decisions such as flood defences and transport corridors, suggesting that reclassification as ‘critical’ would directly affect appraisal methods for major civil schemes.
For UK practitioners, treating natural capital as critical national infrastructure would likely push it into the same risk and resilience frameworks used for energy and water networks, tightening obligations on asset owners to account for ecosystem services in design, maintenance and emergency planning.
Across the 198 Sustainability‑tagged items in our database, the UK stands out for experimenting with valuation tools (e.g. biodiversity net gain metrics) that could be quickly repurposed as regulatory levers if natural capital gains a formal infrastructure designation.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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