January 2026 – Epoch 49

This release note provides information about the January 2026 release of OS Open TOID (Epoch 49).

Feature counts

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

Product	Source Product	CSV	GeoPackage
OS MasterMap Sites layer	49 197	49 197	49 197
OS MasterMap Highways Network	20 875 535	20 875 535	20 875 535
OS MasterMap Topography Layer	490 039 395	490 039 395	490 039 395
Total	510 964 127	510 964 127	510 964 127

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 50), is scheduled for 16 February 2026.