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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:
Details of data issues for AddressBase Core will be communicated on the . This page will provide details of their impacts and updates on the expected time frame for their resolution.
Royal Mail Postcode Address File (PAF)
11 April 2025
National Land and Property Gazetteer
11 April 2025
One Scotland Gazetteer
31 March 2025
OS MasterMap Topography Layer
27 February 2025
This release note provides information about the release of the AddressBase Core product on 15 April 2025.
AddressBase Core
34 623 64
40 514
AddressBase Core
34 623 642
34 623 633
9
Inserts
6 693
Updates
29 956
Deletes
3 865
COU populated 5km tile count
3 785
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 '' in the AddressBase Getting Started Guide.