AddressBase Products July 2025 – Epoch 120

This release note provides information about the July 2025 (Epoch 120) release of the AddressBase products. These products were released to customers on 31 July 2025.

Record counts

Product	Full Supply Record Count	Change-Only Update Record Count
OS Open UPRN	41 270 485	N/A
AddressBase	30 741 629	121 243
AddressBase Plus	38 452 285	477 547
AddressBase Premium	See rows below	See rows below
Street	1 517 722	6 124
Street Descriptor	1 641 715	2 909
BLPU	41 270 485	409 362
Classification	45 085 845	181 304
LPI	46 544 580	142 261
Organisation	1 397 065	18 469
Delivery Point Address	30 853 268	53 795
Application Cross Ref.	199 812 791	536 071
Successor	0	0

• 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.

• Please note that 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	30 741 629	30 741 629	0
AddressBase Plus	38 452 285	38 452 261	24
AddressBase Premium	See rows below	See rows below	See rows below
Street	1 517 722	1 517 719	3
Street Descriptor	1 641 715	1 641 712	3
BLPU	41 270 485	41 270 456	29
Classification	45 085 845	45 085 816	29
LPI	46 544 580	46 544 550	30
Organisation	1 397 065	1 397 063	2
Delivery Point Address	30 853 268	30 853 268	0
Application Cross Ref.	199 812 791	199 812 762	29
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	29 279
Updates	83 730
Deletes	8 234
COU Populated Tile Count	5 103

AddressBase Plus

Change Type	Count
Inserts	45 736
Updates	420 603
Deletes	11 208
COU Populated Tile Count	7 064

AddressBase Premium

AddressBase Premium Table	Inserts	Updates	Deletes
Street	1 340	4 766	18
Street Descriptor	1 410	1 481	18
BLPU	42 746	364 247	2 369
Classification	62 130	94 342	24 832
LPI	53 762	85 450	3 049
Organisation	7 624	4 893	5 952
Delivery Point Address	29 693	15 672	8 430
Application Cross Ref.	179 975	327 464	28 632

Source data currency

The following information relates to the currency of the source data used in the creation of Epoch 120:

Data Source	Date
Royal Mail PAF	19 June 2025
National Land and Property Gazetteer	19 June 2025
One Scotland Gazetteer	02 June 2025
VOA Non-Domestic Rates	16 June 2025
VOA Council Tax	16 June 2025
OS MasterMap Topography Layer	22 May 2025
OS MasterMap Highways Network	05 June 2025
Code-Point with Polygons	01 April 2025
Boundary-Line	01 May 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 page. This page will provide details of their impacts and updates on the expected time frame for their resolution.

Improvements in Epoch 120

Valuation Office Agency matching

The match rates for Council Tax and Non-Domestic Rates for Epoch 120 are detailed as follows based on Valuation Office Agency (VOA) records up to 16 June 2025. The match rate is applicable to the AddressBase Premium product.

Data Source	Records Received	% Matched
Council Tax	27 270 370	99.9
Non-Domestic Rates	2 123 017	96.4

Tertiary classifications

Work is being undertaken to improve the classifications of records within the AddressBase products. This work has resulted in 45 295 more tertiary classifications present in Epoch 120 compared to Epoch 119. Indeed, 88.15% of these tertiary classification improvements are against residential codes.

Next release

The next release of AddressBase products, Epoch 121, is scheduled for 04 September 2025.