September 2025

This release note provides information about the latest release of OS MasterMap (OSMM) Topography Layer, released to customers on 03 September 2025.

OS MasterMap Topography Layer data was released to customers on 03 September 2025. You can download data for the September 2025 release in various formats from the OS Data Hub.

Unfortunately the September 2025 release note for OS MasterMap Topography Layer has been delayed; it will be made available to customers by 10 September 2025. We apologise for this delay.