The Great Britain Historical Database has been assembled as part of the ongoing Great Britain Historical GIS Project. The project aims to trace the emergence of the north-south divide in Britain and to provide a synoptic view of the human geography of Britain at sub-county scales. Further information about the project is available on A Vision of Britain webpages, where users can browse the database's documentation system online. The Great Britain Historical GIS Project has also produced digitised boundary data, which can be obtained from the UK Data Service Census Support service. Further information is available at census.ukdataservice.ac.uk There are four tables in this part of the Great Britain Historical Database, providing a comprehensive account of changing administrative units in England and Wales over the period from 1888 to 1973: Lgd holds all the local government districts (county boroughs, London boroughs, municipal boroughs, rural districts and urban districts) in the GIS and acts as a gazetteer between the GIS and the Great Britain Historical Database. Main_ch holds the total information about each change, e.g. date, total population, total area, type of change, etc (This table is currently unavailable). Sub_area holds details of all the sub areas (ideally civil parishes) affected by the changes (This table is currently unavailable). Lgd_to_cha acts as a lookup table between lgd and main_ch (This table is currently unavailable). Please note: this study does not include information on named individuals and would therefore not be useful for personal family history research.