OS MasterMap Topography Layer Known Data Issues and Service Disruptions
This page provides the details of known data issues and service disruptions impacting the OS MasterMap Topography Layer product.
Service delay starting: 28 July 2025
Disruption description
We are currently experiencing a delay in delivering the next OS MasterMap Topography Layer product refresh, which was due to be available from 28 July 2025.
Impacts of this disruption
The release of OS MasterMap Topography Layer will not be available on its scheduled publication date of Monday, 28 July 2025.
When to expect the next update
We are working hard to resolve the issue to update OS MasterMap Topography Layer as soon as possible. A further update will be provided on Wednesday, 30 July.
Live known data issues
Missing FVDS file in the OS MasterMap Topography Layer (GML Non Geo chunk 30MB) Managed GB Set supplied on 28 April 2025
An issue has been identified with the recent OS MasterMap Topography Layer (GML Non-Geo chunk 30MB) Managed GB Set update order supplied on 28 April 2025. Unfortunately, the FVDS file was missing from the original order.
To address this, we have resupplied affected customers with a new update order containing the missing FVDS file. A notification email with instructions on how to download this new order has been sent out. Please disregard the initial order. The issue resulted from a manual user error, and we are working on solutions to prevent this happening in the future. We apologise for any inconvenience this may have caused and appreciate your understanding.
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