The Great Britain Historical GIS is one of the best developed national GIS databases. It contains a wide variety of census, vital registration and other statistical information published in Britain in the nineteenth and twentieth centuries. These are linked to a temporal GIS containing the changing administrative boundaries used to publish these data allowing the researcher to create a snapshot of a source at any point in time. A variety of sophisticated interpolation methodologies have also been devised that allow data from different time periods to be compared with more detail than has previously been possible. This paper presents a brief description of the GBHGIS database and the analytic approaches that we are taking to analyse the data that it contains.