# AddressBase Products February 2026 – Epoch 125 ## Record counts
ProductFull Supply Record CountChange-Only Update Record Count
OS Open UPRN41 431 031N/A
AddressBase30 874 129126 236
AddressBase Plus38 665 150540 622
AddressBase PremiumSee rows belowSee rows below
Street1 524 0008 604
Street Descriptor1 648 2511 788
BLPU41 466 127393 436
Classification45 258 410122 086
LPI46 802 762155 177
Organisation1 386 58013 693
Delivery Point Address30 988 74963 449
Application Cross Ref.200 605 532553 973
Successor00
**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](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase/addressbase-getting-started-guide/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](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase/addressbase-known-data-issues). 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](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-plus/addressbase-plus-known-data-issues). 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](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-premium/addressbase-premium-known-data-issues-service-disruptions-and-planned-maintenance). 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**.