This file contains the digital vector boundaries for Westminster Parliamentary Constituencies in the United Kingdom, as at December 2018. The boundaries available are: (BUC) Ultra generalised (500m) - clipped to the coastline (Mean High Water mark). Contains both Ordnance Survey and ONS Intellectual Property Rights. Download File SizesUltra generalised (500m) - clipped to the coastline (414 KB).REST URL of ArcGIS for INSPIRE View Service - https://ons-inspire.esriuk.com/arcgis/rest/services/Electoral_Boundaries/Westminster_Parliamentary_Constituencies_December_2018_UK_BUC/MapServer/exts/InspireView REST URL of ArcGIS for INSPIRE Feature Download Service - https://ons-inspire.esriuk.com/arcgis/rest/services/Electoral_Boundaries/Westminster_Parliamentary_Constituencies_December_2018_UK_BUC/MapServer/exts/InspireFeatureDownload REST URL of Feature Access Service - https://ons-inspire.esriuk.com/arcgis/rest/services/Electoral_Boundaries/Westminster_Parliamentary_Constituencies_December_2018_UK_BUC/FeatureServer