> 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/transport-network-portfolio/os-open-usrn/release-notes.md).

# Release Notes

## [OS Open USRN – June 2026 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/june-2026.md)

This release note provides information about the June 2026 release of OS Open USRN.

## [OS Open USRN – May 2026 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/may-2026.md)

This release note provides information about the May 2026 release of OS Open USRN.

## [OS Open USRN – April 2026 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/april-2026.md)

This release note provides information about the April 2026 release of OS Open USRN.

## [OS Open USRN – March 2026 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/march-2026.md)

This release note provides information about the March 2026 release of OS Open USRN.

## [OS Open USRN – February 2026 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/february-2026.md)

This release note provides information about the February 2026 release of OS Open USRN.

## [OS Open USRN – January 2026 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/january-2026.md)

This release note provides information about the January 2026 release of OS Open USRN.

## [OS Open USRN – December 2025 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/december-2025.md)

This release note provides information about the December 2025 release of OS Open USRN.

## [OS Open USRN – November 2025 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/november-2025.md)

This release note provides information about the November 2025 release of OS Open USRN.

## [OS Open USRN – October 2025 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/october-2025.md)

This release note provides information about the October 2025 release of OS Open USRN.

## [OS Open USRN – September 2025 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/september-2025.md)

This release note provides information about the September 2025 release of OS Open USRN.

## [OS Open USRN – August 2025 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/august-2025.md)

This release note provides information about the August 2025 release of OS Open USRN.

## [OS Open USRN – July 2025 release note](/os-downloads/products/transport-network-portfolio/os-open-usrn/release-notes/july-2025.md)

This release note provides information about the July 2025 release of OS Open USRN.


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