Parish level statistics and polygons for England and Wales taken from the 1851 census for the London area.
Until 2008, this version of the 1851 census table was held as 'par_1851_ew_poly1831_gla_clean', as the original par_1851_ew_poly1831_gla table was retained for compatibility with the old GBHGIS.
This version of the 1851 census table is considered temporary. It includes only the registration counties closest to London as part of a consultancy covering the GLA area. It also includes polygon columns, which contain polygons relating to 1831 anicent parishes. The script creating this table does ad-hoc temporary changes to enable the two datasets to match within this table. It does not change any of the data permanently.