Water Environment (Water Framework Directive) Regulations River Basin Management Plan Cycle 3 intertidal seagrass classification data used for the UK Marine Strategy Article 8 biodiversity assessments for the UK Regional Seas. The WER seagrass method statement and classification tool ('Intertidal Seagrass Tool_SAILOR_v2.4_UKTAG.xlsx’) used to calculate WER Ecological Quality Ratios are available at http://www.wfduk.org/resources%20/transitional-and-coastal-waters-intertidal-seagrass. Project coordinated by the Environment Agency and Joint Nature Conservation Committee. River Basin Management Plan Cycle 3 seagrass data held by the relevant WER Agency.