> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes.md). # Release Notes Release notes listed here provide information about the current release of the AddressBase 'family' of products and the previous nine releases. {% hint style="info" %} * The 'AddressBase Products' release notes include information on the AddressBase, AddressBase Plus and AddressBase Premium products. * The 'AddressBase Islands' release notes include information on the AddressBase Plus Islands and AddressBase Premium Islands products. * AddressBase Core is supplied weekly and its release notes can be found on the [AddressBase Core Release Notes page](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes.md). * OS Open UPRN release notes can be found on the [OS Open UPRN Release Notes pages](/os-downloads/products/addresses-and-names-portfolio/os-open-uprn/release-notes.md). {% endhint %} ## Epoch 130 ### [AddressBase products - September 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-september-2026-epoch-130.md) This release note provides information about the September 2026 (Epoch 130) release of AddressBase products. ### [AddressBase Islands products - September 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-september-2026-epoch-130.md) This release note provides information about the September 2026 (Epoch 130) release of AddressBase Islands products. ## Epoch 129 ### [AddressBase products – August 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-august-2026-epoch-129.md) This release note provides information about the August 2026 (Epoch 129) release of AddressBase products. ### [AddressBase Islands products – August 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-august-2026-epoch-129.md) This release note provides information about the August 2026 (Epoch 129) release of AddressBase Islands products. ## Epoch 128 ### [AddressBase products – June 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-june-2026-epoch-128.md) This release note provides information about the June 2026 (Epoch 128) release of AddressBase products. ### [AddressBase Islands products – June 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-june-2026-epoch-128.md) This release note provides information about the June 2026 (Epoch 128) release of AddressBase Islands products. ## Epoch 127 ### [AddressBase products – May 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-may-2026-epoch-127.md) This release note provides information about the May 2026 (Epoch 127) release of AddressBase products. ### [AddressBase Islands products – May 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-may-2026-epoch-127.md) This release note provides information about the May 2026 (Epoch 127) release of AddressBase Islands products. ## Epoch 126 ### [AddressBase products – April 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-april-2026-epoch-126.md) This release note provides information about the April 2026 (Epoch 126) release of AddressBase products. ### [AddressBase Islands products – April 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-april-2026-epoch-126.md) This release note provides information about the April 2026 (Epoch 126) release of AddressBase Islands products. ## Epoch 125 ### [AddressBase products – February 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-february-2026-epoch-126.md) This release note provides information about the February 2026 (Epoch 125) release of AddressBase products. ### [AddressBase Islands products – February 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-february-2026-epoch-125.md) This release note provides information about the February 2026 (Epoch 125) release of AddressBase Islands products. ## Epoch 124 ### [AddressBase products – January 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-january-2026-epoch-124.md) This release note provides information about the January 2026 (Epoch 124) release of AddressBase products. ### [AddressBase Islands products – January 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-january-2026-epoch-124.md) This release note provides information about the January 2026 (Epoch 124) release of AddressBase Islands products. ## Epoch 123 ### [AddressBase products – November 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-november-2025-epoch-123.md) This release note provides information about the November 2025 (Epoch 123) release of AddressBase products. ### [AddressBase Islands products – November 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-november-2025-epoch-123.md) This release note provides information about the November 2025 (Epoch 123) release of AddressBase Islands products. ## Epoch 122 ### [AddressBase products – October 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-october-2025-epoch-122.md) This release note provides information about the October 2025 (Epoch 122) release of AddressBase products. ### [AddressBase Islands products – October 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-october-2025-epoch-122.md) This release note provides information about the October 2025 (Epoch 122) release of AddressBase Islands products. ## Epoch 121 ### [AddressBase products – September 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-september-2025-epoch-121.md) This release note provides information about the September 2025 (Epoch 121) release of AddressBase products. ### [AddressBase Islands products – September 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-september-2025-epoch-121.md) This release note provides information about the September 2025 (Epoch 121) release of AddressBase Islands products. --- # Agent Instructions This documentation is published with GitBook. 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