> For the complete documentation index, see [llms.txt](https://docs.os.uk/osngd/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/osngd/code-lists/code-lists-overview/uppertierlocalauthoritydescriptionvalue.md).

# uppertierlocalauthoritydescriptionvalue

This code list is used in association with the Description attribute which is present within the Upper Tier Local Authority Feature Type. The code list describes the type of upper tier local authority (for example, English unitary authority).

| Label                      | Definition                                                                                                                                                                                                                                                                                                                                                   |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| English Unitary Authority  | Unitary authorities (UAs) are areas with a single tier of local government (as opposed to the two-tier county:district structure).                                                                                                                                                                                                                           |
| London Borough             | The London boroughs are the local government areas within Greater London. The borough councils are unitary administrations with a status similar to metropolitan districts, but they will also be affected by any policies implemented by the Greater London Authority (GLA).                                                                                |
| Metropolitan District      | Metropolitan districts are subdivisions of the six metropolitan county areas of England. Since the abolition of the metropolitan county councils in 1986, the metropolitan district councils have been unitary administrations.                                                                                                                              |
| Non-Metropolitan County    | Counties were formerly administrative units across the whole UK. Due to various administrative restructurings however, the only administrative areas still referred to as counties are the non-metropolitan (shire) counties of England. The English metropolitan counties, although no longer administrative units, are also used for statistical purposes. |
| Scottish Unitary Authority | Unitary authorities (UAs) are areas with a single tier of local government (as opposed to the two-tier county:district structure).                                                                                                                                                                                                                           |
| Welsh Unitary Authority    | Unitary authorities (UAs) are areas with a single tier of local government (as opposed to the two-tier county:district structure).                                                                                                                                                                                                                           |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.os.uk/osngd/code-lists/code-lists-overview/uppertierlocalauthoritydescriptionvalue.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.