The Chartered Institute of Ecology and Environmental Management is the leading professional membership body representing and supporting ecologists and environmental managers in the UK, Ireland and abroad.

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Planning & Infrastructure Bill

All the latest on the Planning and Infrastructure Bill as well as CIEEM's activities.

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Latest Updates

CIEEM responds to Government update on Biodiversity Net Gain exemptions

16th December 2025
CIEEM cautiously welcomes the Government’s confirmation – announced by Housing Minister Matthew Pennycook MP in Parliament today – that it will introduce an area-based exemption from mandatory Biodiversity Net Gain (BNG) for smaller sites up to 0.2 hectares, rather than the previously rumoured 0.5 hectare threshold.

BNG and more

All the latest on Biodiversity Net Gain in England and the other approaches to biodiversity enhancement across the devolved nations and Ireland.

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Training & Events

Featured Event

Train the Trainer for Ecologists

  • Date 29 & 30 January
  • Location London

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