Threads / Biodiversity Net Gain Implementation / The relaxation of the mitigation hierarchy (MH) in the Plan…
Committee Material Published 16 Nov 2025 ↗ View on Parliament

The relaxation of the mitigation hierarchy (MH) in the Planning and Infrastructure Bill has been a significant point of contention. The MH aims to ensure that harm to nature is first avoided, with destruction and compensation used only as a last resort. We believe that the strict application of the MH on housing developments should remain in place, unless it is proven, using the best available scientific evidence, that nature is better served by not adopting the hierarchy in specific and indi...

The relaxation of the mitigation hierarchy (MH) in the Planning and Infrastructure Bill has been a significant point of contention. The MH aims to ensure that harm to nature is first avoided, with destruction and compensation used only as a last resort. We believe that the strict application of the MH on housing developments should remain in place, unless it is proven, using the best available scientific evidence, that nature is better served by not adopting the hierarchy in specific and individual instances. (Conclusion, Paragraph 97) Type: conclusion | Number: 24 | Response status: under_consideration Government response: 73. In our response to the 2024 consultation on reforms to the NPPF which sought views on the introduction of carbon accounting through the planning system, we recognised the concerns raised by respondents including low technological readiness and issues with data accuracy and verification. Mandatin