This file contains the digital vector boundaries for Middle layer Super Output Areas in England and Wales, as at 21 March 2021.It is joined to the Rural Urban Classification data 2021.The Rural-Urban Classification is a Government Statistical Service product developed by the Office for National Statistics; the Department for Environment, Food and Rural Affairs; and the Welsh Assembly Government.Source: Office for National Statistics licensed under the Open Government Licence v.3.0.Contains OS data © Crown copyright 2025Links below to FAQ, Methodology and User GuideFAQ https://geoportal.statistics.gov.uk/documents/ebfac455db0642afaa5052738ce5c32e/about Methodology https://geoportal.statistics.gov.uk/documents/833a35f2a1ec49d98466b679ae0a0646/about User Guide https://geoportal.statistics.gov.uk/documents/c8e8e6db38e04cb8937569d74bce277a/about 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.