> 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/areas-and-zones-portfolio/boundary-line/boundary-line-known-data-issues.md).

# Boundary-Line Known Data Issues

## Live known data issues <a href="#live-known-data-issues" id="live-known-data-issues"></a>

| Data Issue Name                       | Data Issue Description                                                                              |
| ------------------------------------- | --------------------------------------------------------------------------------------------------- |
| County Electoral Division census code | All features in Boundary-Line’s County Electoral Division layer have a census\_code of '999999999'. |

{% hint style="info" %}
To report an issue not currently listed here, please visit the ['Contact us' page on the OS website](https://www.ordnancesurvey.co.uk/contact-us/business-government/use-os-data).
{% endhint %}


---

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