1885 - 1918: England
These maps have been created by the author of this website working backwards in time from the current boundaries. The data for 2010 boundaries is sourced from Ordnance Survey Open Data and permission to use this is gratefully acknowledged.
Hovering over any map will reveal the constituency name (in the same format as used in the rest of this site) - this will be centred within the constituency, but clicking on the map will show the constituency name at the point clicked.
If you wish to download the data to use in your own application you may do this using the share icon towards the top left of the map. This gives an option for data download, in a variety of formats. Using geojson, for example, should allow the data to be imported into a GIS and reformatted as required. If you do reuse this data please ensure that you credit parlconst.org as the source.
Care has been taken in producing and checking these maps. However, given the scale and nature of the project it is almost inevitable that there may be some errors. Should anything be found which doesn't look right, please let us know using the contact form, so that it may be corrected.
1885 - 1918: England (Southern)
The boundaries introduced in 1885 remained unchanged until the review implemented in 1918.
Between 1885 and 1918 non-resident freeholders of properties in Borough constituencies were eligible to vote in a specified Division of the County, so Borough areas could be considered as being in two different constituencies. This is ignored for the purpose of these maps and constituency areas are considered mutually exclusive, i.e. the County divisions shown exclude any areas that were also in a Borough constituency in this period. (A document showing the relationship between Boroughs and County Constituencies in this period has been compiled by John Bryant, and can be accessed here).
1885 - 1918: England (Midlands)
1885 - 1918: England (Northern)