Sources, methods and downloads
The same evidence release feeds this site and UK Facts dev. A website update is not a new review of every source.
Local interpretation reviewed 2026-10-16. Ward boundaries: May 2026; individual source retrieval dates and periods are below. Snapshot b5d964183e1c.
How the ward figures were built
Sussex Police did not provide crime data for January 2026 at the original publication. The checked changelog does not explicitly confirm a later crime-data refresh for that month. Published monthly records are retained, but annual totals, rates and year-on-year comparisons spanning that month are withheld pending confirmation. This does not mean the currently returned records are absent. Historical source archives remain unchanged; use the reviewed evidence package for current interpretation. Publication notice ↗
2026 ONS official electoral ward membership and May 2026 generalised clipped boundaries. These are not police neighbourhoods or parishes.
Original Census 2021 observations. Chichester and Portsmouth use published ward values; Southampton uses sums of complete Census output-area counts through the official 2026 ONS best-fit lookup. Output areas can straddle ward boundaries; best-fit allocation is an approximation. Census privacy protection can cause small differences between totals and summed categories.
The same Census definitions, reference day and denominator rules are used. Small differences between direct ward publication and OA aggregation are possible; neither is a current population estimate.
Agent source/category/geography and calculation checks; independent analytical review remains outstanding.
not provided; electoral wards are not parishes
Ward sources and request records
May 2026 wards: generalised clipped boundaries, checked against 2026 ward-to-authority lookup
Office for National Statistics · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗2 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Population: Census 2021
Office for National Statistics via Nomis · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗6 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Age: Census 2021
Office for National Statistics via Nomis · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗6 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Deprivation: Census 2021
Office for National Statistics via Nomis · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗6 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Health: Census 2021
Office for National Statistics via Nomis · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗6 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Tenure: Census 2021
Office for National Statistics via Nomis · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗6 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Qualifications: Census 2021
Office for National Statistics via Nomis · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗6 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Census 2021 output areas to 2026 wards best-fit lookup
Office for National Statistics · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗1 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Street-level mapped police records
Police.uk / Home Office and territorial police forces · checked 2026-10-17T09:57:14.669455+00:00
Official source ↗Single padded rectangle per authority-month, deduplicate nonblank numeric IDs within each response; retain idless rows; point-in-polygon into fixed May 2026 official ward geometry; no nearest-boundary reassignment. ASB and BTP are excluded from crime totals. The same ward boundaries apply to all displayed months. Reporting completeness is not guaranteed by API availability.
72 stored request receipts. Exact URLs, retrieval dates and checksums are in the download.
Limits and assurance
- City and district boundaries differ; area labels are part of every measure.
- Project status records describe the latest reviewed official evidence, not continuous live tracking.
- Actions marked proposal are Counts analysis, not council commitments or proven effects.
- Independent analytical review remains outstanding.
Our approach follows the AQuA Book: keep a clear question, record sources and assumptions, test calculations and show uncertainty. Automated checks are not independent analytical review or certification.
The AQuA Book ↗
Council documents are checked for changes; a changed page goes into a review queue. It does not automatically become a new claim or a completed project. Source failures retain the last successful evidence and are recorded.