OS 381870-2004Ordnance Survey: Boundaries Branch: Deposited Maps (DM and DMX Series)
This series consists of certified copies of maps deposited with the Ordnance Survey under the provisions of acts or orders. They show statutory changes to public boundaries in England and Wales; for non-public boundaries the map may be inaccurate and cannot be considered an authority.
The map scales range from 1:350 to 1:25,000 but the bulk of the series is at either 1:2,500 or 1:10,560.