June 2025 – Epoch 44

This release note provides information about the June 2025 release of OS Open TOID (Epoch 44).

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	20 793 544	20 793 544	20 793 544
OS MasterMap Topography Layer	487 370 544	487 370 544	487 370 544
Total	508 213 164	508 213 164	508 213 164

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 45), is scheduled for 11 August 2025.