Ancient woodland — woodland continuously present since 1600 — supports extraordinary biodiversity developed over centuries, with irreplaceable welfare value for specialist species found nowhere else.
Ancient woodland provides welfare benefits for species through its structural complexity — multiple canopy layers, standing deadwood, diverse understorey and complex soil ecology create niches for thousands of species. Specialist ancient woodland invertebrates, lichens and fungi depend on conditions that cannot be replicated in newer woodland. The loss of ancient woodland to development is an irreversible welfare harm at the landscape scale — every hectare destroyed eliminates centuries of accumulated biodiversity. Sensitive management, including deadwood retention and appropriate deer management, maintains welfare value for woodland-dependent species.