This file contains the digital vector boundaries for Middle layer Super Output Areas in England and Wales, as at 21 March 2021.The boundaries available are: (BSC) Super generalised (200m) - clipped to the coastline (Mean High Water mark).Contains both Ordnance Survey and ONS Intellectual Property Rights.File size: 7 MBVersion amendments (V2) 14th July 2023: Additional Long/Lat/BNG_E/BNG_N coordinates added. Overlapping intersection repair maintenance. (V3) 8th July 2024: NMW column added to attribute table.REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/Middle_layer_Super_Output_Areas_December_2021_Boundaries_EW_BSC_V3/FeatureServerREST URL of WFS Server –https://dservices1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/services/Middle_layer_Super_Output_Areas_December_2021_Boundaries_EW_BSC_V3/WFSServer?service=wfs&request=getcapabilitiesREST URL of Map Server –https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/Middle_layer_Super_Output_Areas_December_2021_Boundaries_EW_BSC_V3/MapServer