Code History Database: UK Administrative Geography Changes

As of 31st December 2025, this database tracks historical changes to official codes for UK administrative geographies. It includes updates for areas in England such as Civil Parishes, Electoral Wards, and Integrated Care Boards, and for areas in Wales such as Communities. The dataset supports longitudinal analysis of boundary and code changes across multiple government and health-related geographies.

Use Cases

• Linking historical records based on changing administrative area codes over time.
• Analyzing the impact of boundary changes on demographic or health statistics for areas like Cancer Alliances or Combined Authorities.
• Maintaining temporal consistency in geospatial applications that reference codes for Civil Parishes or Electoral Wards.

Strengths

• Provides a specific snapshot of administrative codes as of 31st December 2025.
• Covers a wide range of geography types, including health service boundaries like Integrated Care Boards and Sub Integrated Care Board Locations.
• Available on multiple open data platforms, indicating established use and official provenance.

Limitations

• Column names and exact data schema are not provided in the source metadata.
• Conflicting temporal references exist: one source states the data is 'as at 1st June 2025', while others state '31st December 2025'.
• Key metadata such as row count, specific license, and detailed documentation are absent from the provided descriptions.

Provenance

Source

Government Digital Service

Collection Method

Likely compiled from official UK geographic and administrative registers.

Time Range

Historical changes up to 31st December 2025 (or 1st June 2025, per conflicting source).

Freshness

Last updated metadata on 2026-06-24, but the data snapshot is for 2025.

Geography

United Kingdom, with specific updates noted for England and Wales.