Administrative boundaries are defined as showing the limits of responsibility and representation for electoral and administrative purposes. Boundary alignments are shown within the Administrative Boundaries theme. As well as the boundary’s relationship to real-world objects, its mereing and boundary descriptions, where needed for clarification, are also supplied.
The following types of boundary are shown within the Administrative Boundaries theme:
County Constituency
Borough Constituency (England and Wales)
Burgh Constituency (Scotland)
Assembly Electoral Region and Assembly Constituency (Wales)
Parliamentary Electoral Region and Parliamentary Constituency (Scotland)
County
City and County of London, District, London borough, Unitary Authority, and Metropolitan District
Civil Parish and the Inner and Middle Temples
Electoral Division
Ward
Unitary Authority
Community
Electoral Division
Unitary Authority
Ward
Boundary Posts
Boundary Stones
Boundary Markers
Alignments of Boundaries
Textual Descriptions of Boundaries, Mereings and Posts and Stones
Where two or more boundaries are coincidental, a single alignment is shown by the most important boundary in the following order:
County, City and County of London, Unitary Authority, District, London Borough and Metropolitan District, Civil Parish, Community, Inner and Middle Temples
European Electoral Regions, County / Borough Constituencies
Welsh Assembly Electoral Region
Electoral Division and / or Ward
Unitary Authority
European Electoral Regions, County / Burgh Constituencies
Scottish Parliamentary Electoral Region
Ward
A textual description often accompanies this occurrence and is used for clarification. If the alignment of an administrative boundary coincides with any other feature (other than another boundary), then both will be shown in their respective themes.
More information on administrative boundary alignments can be found here.