The Environment Act 2021 (c. 30) inserted section 90A and Schedule 7A into the Town and Country Planning Act 1990 (c. 8) (biodiversity gain in England). They set out that (subject to exceptions) every planning permission for the development of land in England is deemed to be granted subject to a new general condition. The condition requires a biodiversity gain plan to be submitted and approved by the planning authority before development can lawfully be begun. The biodiversity gain plan must contain an assessment of the value of natural habitats before development and after development, and ensure that at least a 10% net gain is achieved between the earlier and later values.