23 December 2024

This release note provides information about the release of the AddressBase Core product on 23 December 2024.

Please note: There will be no release of AddressBase Core on 31 January 2024 due to a company-wide shutdown over the festive period. The next release of AddressBase Core will be on 07 January 2025.

Record counts

Product	Full Supply record count	Change-Only Update record count
AddressBase Core	34 559 204	98 188

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.

Product supply comparison

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.

Product	MGBS Full Count	National 5km tiled supply	Difference
AddressBase Core	34 559 204	34 559 197	7

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.

Changed records

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:

Change type	Count
Inserts	8 535
Updates	87 373
Deletes	2 280
COU populated 5km tile count	3 960

It is important that COUs are processed with Deletes first, then Inserts and Updates. This is to ensure that updates are applied in the correct order. Guidance on this can be found in the 'Working with COU data' page in the AddressBase Core Getting Started Guide.

Known issues

One new issue has been identified in this release of AddressBase Core, causing an English record to be incorrectly matched to a Northern Irish POST_TOWN and POSTCODE. The UPRN = 10094417972 has been incorrectly assigned a ‘POST_TOWN’ of ‘BELFAST’ and an incorrect ‘POSTCODE’ of ‘BT12 4EA’. This address is affected in isolation, and the match will be fixed for the next AddressBase Core release.

Source data currency

The following information relates to the currency of the source data used in the creation of this release of AddressBase Core:

Data source	Date
Royal Mail Postcode Address File (PAF)	20 December 2024
National Land and Property Gazetteer	20 December 2024
One Scotland Gazetteer	09 December 2024
OS MasterMap Topography Layer	28 November 2024