In GN36 Appendix C – Habitat Type Classification and Reference Index the distinctiveness types which have been set for Extensive and Intensive green roofs in part relate to ‘likely’ planting taking into consideration possible options for these roofs.
Taking into consideration evolving and changing practices around green roofs (and generally relating to habitat classification) notes A&B in GN36 Appendix C provide the ecologist with the flexibility to use their professional judgement to use alternative information / classification as long as this is justified.
As such, whilst the distinctiveness levels set in Appendix C should be used in normal circumstances, where the ecologist can provide evidence/justification for doing so, they can specify the distinctiveness of the green roof based specifically on the planting that has implemented on that project.
