AddressBase Products February 2026 – Epoch 125

This release note provides information about the February 2026 Epoch 125 release of the AddressBase products. These products were released to customers on 19 February 2026.

Record counts

Product	Full Supply Record Count	Change-Only Update Record Count
OS Open UPRN	41 431 031	N/A
AddressBase	30 874 129	126 236
AddressBase Plus	38 665 150	540 622
AddressBase Premium	See rows below	See rows below
Street	1 524 000	8 604
Street Descriptor	1 648 251	1 788
BLPU	41 466 127	393 436
Classification	45 258 410	122 086
LPI	46 802 762	155 177
Organisation	1 386 580	13 693
Delivery Point Address	30 988 749	63 449
Application Cross Ref.	200 605 532	553 973
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	30 874 129	30 874 128	1
AddressBase Plus	38 665 150	38 665 123	27
AddressBase Premium	See rows below	See rows below	See rows below
Street	1 524 000	1 523 997	3
Street Descriptor	1 648 251	1 648 248	3
BLPU	41 466 127	41 466 097	30
Classification	45 258 410	45 258 378	32
LPI	46 802 762	46 802 731	31
Organisation	1 386 580	1 386 578	2
Delivery Point Address	30 988 749	30 988 748	1
Application Cross Ref.	200 605 532	200 605 501	31
Successor	0	0	0

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.

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	38 200
Updates	78 063
Deletes	9 973
COU Populated Tile Count	5 055

AddressBase Plus

Change Type	Count
Inserts	54 832
Updates	471 150
Deletes	14 640
COU Populated Tile Count	6 718

AddressBase Premium

AddressBase Premium Table	Inserts	Updates	Deletes
Street	951	7 645	8
Street Descriptor	1 021	757	10
BLPU	38 515	351 502	3 419
Classification	49 351	56 965	15 770
LPI	52 183	98 902	4 092
Organisation	4 226	5 029	4 438
Delivery Point Address	38 450	14 998	10 001
Application Cross Ref.	174 454	350 798	28 721

Source data currency

The following information relates to the currency of the source data used in the creation of Epoch 125:

Data Source	Date
Royal Mail PAF	15 January 2026
National Land and Property Gazetteer	15 January 2026
One Scotland Gazetteer	04 January 2026
VOA Non-Domestic Rates	12 January 2026
VOA Council Tax	12 January 2026
OS MasterMap Topography Layer	06 January 2026
OS MasterMap Highways Network	09 January 2026
Code-Point with Polygons	02 January 2026
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 125

Valuation Office Agency matching

The match rates for Council Tax and Non-Domestic Rates for Epoch 125 are detailed as follows based on Valuation Office Agency (VOA) records up to 12 January 2026. The match rate is applicable to the AddressBase Premium product.

Data Source	Records Received	% Matched
Council Tax	27 386 555	99.92
Non-Domestic Rates	2 124 360	96.50

Next release

The next release of AddressBase products, Epoch 126, is scheduled for 02 April 2026.