May 2025 – Epoch 43

This release note provides information about the May 2025 release of OS Open TOID (Epoch 43).

Feature counts

Feature counts for this release are provided in the following table:

Product	Source Product	CSV	GeoPackage
OS MasterMap Sites Layer	49 076	49 076	49 076
OS MasterMap Highways Network	20 778 677	20 778 677	20 778 677
OS MasterMap Topography Layer	486 726 333	486 726 333	486 726 333
Total	507 554 086	507 554 086	507 554 086

There are no missing features and no duplicated TOIDs in this release. No significant errors have been identified.

Next release

The next release of OS Open TOID (Epoch 44), is scheduled for 23 June 2025.