This file contains the digital vector boundaries for Westminster Parliamentary Constituencies in the UK, as at 31 December 2017. The boundaries available are:
Full resolution - extent of the realm (usually this is the Mean Low Water mark but in some cases boundaries extend beyond this to include off shore islands);
Full resolution - clipped to the coastline (Mean High Water mark);
Generalised (20m) - clipped to the coastline (Mean High Water mark);
Super generalised (200m) - clipped to the coastline (Mean High Water mark) and
Ultra generalised (500m) - clipped to the coastline (Mean High Water mark).
Contains both Ordnance Survey and ONS Intellectual Property Rights.