These maps highlight the electoral geography of the United Kingdom. Clearly visible Districts, Boroughs and Unitary Authorities boundaries and names are overlain on an Ordnance Survey backdrop map. Boundaries in a different colour to make identification very easy. Maps can be made of local regions which illustrate street level boundaries , to regional areas which illustrate many Electoral Constituencies and Wards and the major roads and cities. Boundary-line data is updated bi-annually (spring and fall).