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.
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.
