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3 September 2025 - National Highways and environmental sustainability - Oral evidence

Committee Environmental Audit Committee
Inquiry National Highways and environmental sustainability

Wednesday 3 September 2025

Start times: 2:00pm (private) 2:30pm (public)


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Can we build new roads without threatening biodiversity? EAC explores environmental impacts of major road developments 

This week the Environmental Audit Committee considers the environmental impacts of road construction, and whether schemes designed to mitigate this such as biodiversity net gain (BNG) are fit for purpose.

The cross-party committee of MPs will consider how successfully environmental mitigation and BNG have helped to protect the environment and improve biodiversity in new developments, and whether there are specific problems associated with the delivery of new road infrastructure.

In its inquiry into environmental sustainability and housing growth, MPs have heard that the delivery of commitments to improve biodiversity around new developments has sometimes been poor, and that monitoring, enforcement and skills issues have hampered progress.

Meeting details

At 2:30pm: Oral evidence
Work National Highways and environmental sustainability (Non-inquiry session)
Principal Policy Advocate, Infrastructure at The Woodland Trust
Head of Tree Collections at Royal Botanical Gardens, Kew
At 3:15pm: Oral evidence
Work National Highways and environmental sustainability (Non-inquiry session)
Director of Operations UK at Stormwater Shepherds
Head of Policy and Engagement at Chartered Institution of Environmental and Water Management (CIWEM)
At 3:45pm: Oral evidence
Work National Highways and environmental sustainability (Non-inquiry session)
Chief Executive at National Highways
Director of Environmental Sustainability at National Highways

Concerns have been raised about the success of tree planting for certain road projects. In 2023, the Times reported that 400,000 trees planted in roadwork schemes had died. MPs are likely to ask witnesses what specific challenges are raised by planting new trees, and how developers can prevent major failures.

MPs will also consider how pollution from road run-off affects local ecosystems by leaking into waterways. In 2022, the Government accepted that more action was needed to tackle this problem; MPs will ask National Highways whether the situation has improved since then.

Location

Room 18, Palace of Westminster

How to attend