Identifying Long Term Evidence Needs for Biodiversity Net Gain


Biodiversity Net Gain (BNG) is expected to become mandatory in England when the Environment Bill becomes law later this year. Many local planning authorities and developers are already introducing policies to support BNG delivery. How will we know if such a policy shift has delivered on the ambition to halt biodiversity loss from development and provide enhancements. What longer term research is needed, over and above monitoring, to provide evidence of this policy’s impact? Legislation is not enough. We need evidence of its effectiveness.


CIEEM has invited representatives from the Ecological Continuity Trust, Natural England and University of Kent as well as leading BNG advocates to discuss the research we need to be planning and finding now to give policy makers and practitioners the answers we will need in the future.


- Julia Baker, Biodiversity Technical Specialist, Balfour Beatty and lead author of BS863, the new British Standard for Biodiversity Net Gain

- Tom Butterworth, Deputy Head of Ecology and Technical Director for Natural Capital, WSP

- Sophus zu Ermgassen, PhD Researcher, University of Kent School of Anthropology and Conservation

- Laurence Lewis-Jones, Principal Adviser (Biodiversity Net Gain), Natural England

- Ben Sykes, Executive Director, Ecological Continuity Trust

- Ken Thompson, Trustee, Ecological Continuity Trust and former Senior Research fellow, University of Sheffield

Chair: Sally Hayns, CEO, CIEEM


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