1 Introduction

Biodiversity Net Gain (BNG) is an approach to development, land and marine management which aims to leave biodiversity in a measurably better state than before.

Under the Environment Act 2021, it has been mandatory for all planning permissions in England to achieve at least 10% net gain since 12 February 2024 (and for small sites from 2 April 2024), with some exemptions, following the national regulations.

The purpose of this Technical Guidance Note (TGN) is to provide guidance for applicants and agents explaining how BNG is implemented in Exmoor National Park, in accordance with the national regulations. However, we also highly recommend engaging with the Exmoor National Park Authority Ecologist for advice prior to applying.

Policies in the Exmoor National Park Local Plan (2011 – 2031) also support the enhancement of biodiversity, including:

  • Policy CE-S3 – Biodiversity and Green Infrastructure
  • Policy CE-D2 – Green Infrastructure Provision
  • Development delivery ... will conserve, restore and re-create priority habitats and conserve and increase priority species identified for Exmoor in the Exmoor Wildlife Research and Monitoring Framework (or successor publication).
  • The enhancement of biodiversity and creation of multi-functional green infrastructure networks at a variety of spatial scales, including cross-boundary connectivity to areas adjacent to the National Park, that help support ecosystem services will be encouraged.
  • Opportunities will be promoted for habitat management, restoration, expansion that strengthens the resilience of the ecological network, and enables habitats and species to adapt to climate change or to mitigate the effects of climate change.
  • Green infrastructure that incorporates measures to enhance biodiversity, including dispersal areas identified within the ecological network, should be provided as an integral part of development.
  • Development proposals should include measures that will enhance green infrastructure provision and create opportunities for wildlife in the National Park commensurate with the scale of the proposal and intensity of activity expected.

Furtner, more detailed, guidance on the process of preparing an application can be found from Devon County Council and Somerset Council along with the national planning practice guidance for biodiversity net gain.

This TGN is a material consideration that will be considered by decision makers when determining planning applications in Exmoor National Park.

Well designed and executed BNG is expected to make a meaningful contribution to nature recovery on Exmoor in line with the Exmoor Nature Recovery Vision and the Exmoor National Park Management Plan.