ONS Postcode Directory: UK Postcode to Administrative Area Linkage (November 2023)

United Kingdom postcode directory linking postcodes to administrative areas, produced by the Government Digital Service. The user guide, last updated on 2025-08-11, details content, methodology, data formats, and limitations. It is a 826 KB HTML document.

Use Cases

• Geocoding address data based on the postcode-to-area linkage methodology described.
• Aggregating statistics to administrative units based on the directory content.
• Assessing data quality for spatial analyses based on the described limitations and currency information.

Strengths

• Includes a detailed user guide covering methodology, formats, and limitations.
• Data currency and recent changes are documented, as mentioned in the description.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Government Digital Service

Collection Method

Methodology for assigning areas to postcodes is described in the user guide.

Time Range

Referenced snapshot is from November 2023.

Freshness

Last updated 2025-08-11 08:19:31; freshness should be verified.

Geography

United Kingdom