National Statistics Postcode Lookup: UK Geographic Reference Data Guide

May 2019 user guide for the National Statistics Postcode Lookup (NSPL) published by the Government Digital Service. The guide contains information on directory content, data currency, methodology for assigning areas to postcodes, data formats, quality, limitations, and recent changes. It is a 386 KB HTML document last updated on the platform in August 2025.

Use Cases

• Link postcodes to administrative areas based on the described assignment methodology.
• Assess data quality for geographic analysis based on the documented limitations.
• Understand data currency and recent changes for temporal studies based on the guide's information.

Strengths

• Official guide from the Government Digital Service.
• Includes documented methodology for area assignment.
• File size is specified as 386 KB.
• Platform last updated date is 2025-08-11.

Limitations

• The dataset itself (rows, columns, sample) is unavailable for inspection.
• Description metadata is limited; actual data quality requires manual inspection after download.
• Data is from May 2019, which may be outdated for current applications.

Provenance

Source

Government Digital Service

Collection Method

Methodology for assigning statistical areas to postcodes is described.

Time Range

May 2019

Freshness

Data referenced is from May 2019; guide metadata was last updated on the platform in August 2025.

Geography

United Kingdom (implied by 'National Statistics' and postcode context)