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Please note that the Full Supply record count is based on a Managed Great Britain Set (MGBS). If you ordered your national coverage via the online ordering system using a polygon outline, your counts may differ.
There is a difference in record counts between taking a national Managed Great Britain Set (MGBS) and the national 5km-tile supply. This is because the two supplies use different selection criteria. The difference in record counts is shown in the following table, allowing you to validate your data holdings once you have loaded the latest release of AddressBase Core.
A small difference in record counts is expected due to there being several features supplied in the MGBS which fall outside of the tiled area.
If you receive a Change-Only Update (COU) supply for your AddressBase Core product, you will receive Insert, Update and Delete records within the supplied file. The following table details the numbers of these records which can be expected in the COU supply of the product:
The following information relates to the currency of the source data used in the creation of this release of AddressBase Core:
Royal Mail Postcode Address File (PAF)
14 March 2025
National Land and Property Gazetteer
14 March 2025
One Scotland Gazetteer
10 March 2025
OS MasterMap Topography Layer
16 January 2025
This release note provides information about the release of the AddressBase Core product on 18 March 2025.
AddressBase Core
34 607 765
44 207
AddressBase Core
34 607 765
34 607 757
8
Inserts
8 166
Updates
33 546
Deletes
2 495
COU populated 5km tile count
3 130
It's important that COUs are processed with Deletes first, then Inserts and Updates. This is to ensure that updates are applied in the correct order. Further guidance on this can be found in 'Working with COU data' in the AddressBase Getting Started Guide.