What is required at the planning application stage
Mandatory Validation Requirements
- a statement indicating whether BNG is applicable or the reasons why not, where relevant 
- the completed Biodiversity Metric showing the pre-development biodiversity value of onsite habitat on the date of application (or earlier date) (to be submitted in Excel and PDF format)
- where an earlier date is proposed, the proposed earlier date and the reasons for proposing that date
- a statement confirming whether the biodiversity value of the onsite habitat is lower on the application date due to any degradation activities; 
- a description of any irreplaceable habitat on the site
- a scale plan showing onsite habitat on the date of application (or earlier date), including irreplaceable habitat
Requirements for outline and reserved matters applications
Outline applications are subject to the same provisions for BNG as described above.
Reserved Matters applications should:
- continue to demonstrate how BNG will be achieved
- add more detail to the Biodiversity Metric and other required evidence as appropriate, based on finalised layout plans