In order to access these services you must be in possession of a national licence for the data from the OS which covers the relevant datasets

The OS VML MM 'Carto' base map is designed to be used as background mapping providing a seamless map view from small to large scales with a consistent cartographic representation.

The sources of data are Ordnance Survey Vector Map District data for small and mid-scales, and Vector Map Local & MasterMap for the largest scales. The currency of the data is;

MasterMap - 03/2021
Vector Map Local - 04/2021
MasterMap Greenspace - 10/2020
Vector Map District - 11/2020
Open Greenspace - 04/2021
Open Map Local - 04/2021
OpenRivers - 04/2021

The coverage of the map service is GB.
The map projection is British National Grid.
The map service is cached down to 1:500, but can be viewed at an additional level of detail at 1:250 scale.

Updated: 11/05/2021