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Lower Thames Crossing approval shows an outdated approach to transport

David Mairs
By David Mairs
28th March 2025

The announcement that the Lower Thames Crossing Development Consent Order has been approved by Heidi Alexander, Secretary of State for Transport, raises profound concern at CPRE Kent.

We have consistently argued that this project represents poor value for money and fundamentally contradicts the UK’s commitments to achieving net-zero carbon

This approval is deeply troubling. Throughout the lengthy planning process, CPRE Kent have demonstrated that the environmental and financial harms from this project significantly outweigh its limited benefits. National Highways has consistently underestimated the negative consequences, both environmental and economic, while overstating the supposed congestion relief it will provide.

We also highlighted the flawed cost-benefit analysis provided by National Highways, which overlooked substantial financial impacts beyond the immediate project boundaries. Crucially, the scheme’s significant carbon footprint undermines the UK’s net-zero targets. It also threatens irreplaceable ancient woodland, habitats and significant green spaces in Kent.

National CPRE wrote to then-Transport Secretary Louise Haigh in August last year, urging a comprehensive review of capital transport commitments, stating clearly that schemes like the Lower Thames Crossing offered very low value for money and exacerbated climate emissions.

Despite this clear advice, yesterday’s decision sadly demonstrates that the government is still pursuing outdated roadbuilding approaches contrary to expert evidence and public interest.

CPRE Kent will now scrutinise the decision notice once published.

  • For more on the Lower Thames Crossing, click here
The proposed southern approach to the crossing