AddressBase Products November 2025 – Epoch 123

This release note provides information about the November 2025 (Epoch 123) release of the AddressBase products. These products were released to customers on 27 November 2025.

Record counts

Product	Full Supply Record Count	Change-Only Update Record Count
OS Open UPRN	41 386 550	N/A
AddressBase	30 821 567	131 373
AddressBase Plus	38 580 690	632 773
AddressBase Premium	See rows below	See rows below
Street	1 521 134	21 137
Street Descriptor	1 645 281	2 669
BLPU	41 386 550	494 886
Classification	45 185 907	183 823
LPI	46 697 330	207 444
Organisation	1 386 990	14 848
Delivery Point Address	30 935 396	59 171
Application Cross Ref.	200 280 777	679 795
Successor	0	0

Please note:

• The Full Supply record counts are based on a Managed Great Britain Set (MGBS). If you have ordered your national coverage via the online ordering system using a polygon outline, then your counts may differ.

• Change-Only Updates (COUs) are not available for the OS Open UPRN product.

Product supply comparison

There is a difference in product counts between taking a national Managed Great Britain Set (MGBS) and a national Area of Interest (AOI). This is because the two supplies use different selection criteria. The differences are shown in the following table, allowing for you to validate your data holdings once you have loaded the latest release of AddressBase data.

The national AOI refers to the pre-selection GB polygon from our download store. Therefore, if you have drawn your own AOI, the count will vary.

If you are unsure of your supply type, please check this with your OS Relationship Manager.

Product	MGBS Full Count	National AOI Full Count	Difference
AddressBase	30 821 567	30 821 566	1
AddressBase Plus	38 580 690	38 580 664	26
AddressBase Premium	See rows below	See rows below	See rows below
Street	1 521 134	1 521 131	3
Street Descriptor	1 645 281	1 645 278	3
BLPU	41 386 550	41 386 519	31
Classification	45 185 907	45 185 874	33
LPI	46 697 330	46 697 298	32
Organisation	1 386 990	1 386 988	2
Delivery Point Address	30 935 396	30 935 395	1
Application Cross Ref.	200 280 777	200 280 745	32
Successor	0	0	0

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.

Changed records

If you receive a Change-Only Update (COU) supply for your AddressBase product, you will receive Insert, Update and Delete records within the supplied file. The following tables detail the numbers of these records which can be expected in an MGBS supply, and also how many tiles are affected if you take your supply as Changed Chunks.

AddressBase

Change Type	Count
Inserts	31 370
Updates	88 794
Deletes	11 209
COU Populated Tile Count	5 260

AddressBase Plus

Change Type	Count
Inserts	57 974
Updates	559 035
Deletes	15 764
COU Populated Tile Count	7 287

AddressBase Premium

AddressBase Premium Table	Inserts	Updates	Deletes
Street	1 398	19 689	50
Street Descriptor	1 430	1 189	50
BLPU	42 394	448 615	3 877
Classification	54 370	107 917	21 536
LPI	54 146	148 726	4 572
Organisation	4 303	5 843	4 702
Delivery Point Address	32 165	15 818	11 188
Application Cross Ref.	215 860	401 543	62 392

Source data currency

The following information relates to the currency of the source data used in the creation of Epoch 123:

Data Source	Date
Royal Mail PAF	23 October 2025
National Land and Property Gazetteer	23 October 2025
One Scotland Gazetteer	06 October 2025
VOA Non-Domestic Rates	23 October 2025
VOA Council Tax	23 October 2025
OS MasterMap Topography Layer	14 October 2025
OS MasterMap Highways Network	06 October 2025
Code-Point with Polygons	01 October 2025
Boundary-Line	02 October 2025

Data issues

AddressBase

Details of live and resolved data issues for AddressBase will be communicated on the AddressBase Known Data Issues page. This page will provide details of their impacts and updates on the expected time frame for their resolution.

AddressBase Plus issues

Details of live and resolved data issues for AddressBase Plus will be communicated on the AddressBase Plus Known Data Issues page. This page will provide details of their impacts and updates on the expected time frame for their resolution.

AddressBase Premium

Details of live and resolved data issues for AddressBase Premium will be communicated on the AddressBase Premium Known Data Issues, Service Disruptions and Planned Maintenance page. This page will provide details of their impacts and updates on the expected time frame for their resolution.

Improvements in Epoch 123

Valuation Office Agency matching

The match rates for Council Tax and Non-Domestic Rates for Epoch 123 are detailed as follows based on Valuation Office Agency (VOA) records up to 23 October 2025. The match rate is applicable to the AddressBase Premium product.

Data Source	Records Received	% Matched
Council Tax	27 338 190	99.90
Non-Domestic Rates	2 124 934	96.35

Next release

The next release of AddressBase products, Epoch 124, is scheduled for 08 January 2026