The mapping and route-planning feature is powered by cycle.travel. 

Our maps are made using open data from OpenStreetMap, licensed under the Open Database Licence; with additional data from Ordnance Survey and from the Department for Transport, licensed under the Open Government Licence (© Crown copyright and database right 2020).

The information on these maps is recorded by volunteers from the OpenStreetMap project. If you see something that’s missing or wrong, you can become an editor at OpenStreetMap and correct it. We update our maps with the latest OSM data approximately every month.