{"version":"ew-v4","phase":"E8","frozenAt":"2026-10-12","status":"Final expansion registry frozen with recorded deferrals","masterCount":35672,"countries":{"England":33755,"Wales":1917},"inventory":{"totalCandidates":62,"totalCalculated":44,"featuresWithBands":38,"diagnosticOnly":6,"totalDeferred":18},"canonicalLookup":{"url":"/research/ew-deciles/v3/full-feature-decile-lookup.csv.gz","bytes":13285590,"sha256":"40ec1734eec81c7a587edf8ddaa9f7d65321abea0ec673481eb5403777882c35"},"priorVersion":"ew-v3","priorFilesPreserved":181,"preservation":"All 181 prior v1–v3 public files remain byte-identical. The 62-candidate national lookup and all stored feature series are reused by exact URL and SHA256. No cut-offs, values or eligibility decisions changed.","ranking":"Equal LSOA weights across one England and Wales master. Eligible observed values only; identical values together; equality in lower band; empty and unequal bands retained. Filters and insurer samples never rerank.","bandEncoding":"CSV 0 = Z for the three declared sparse features; 1–10 = P1–P10 for their positives or D1–D10 otherwise. Blank numeric cells are missing or withheld, never zero.","coverage":"Every candidate has combined, country, region, rural/urban, detailed rurality and country-by-rurality counts. Valid raw values, banded rows and unbanded diagnostic values are separate.","geography":"LSOA2021 master; reference authority field is UTLA2023. Insolvency uses its separate LAD2025 reporting-area mapping, including combined reporting areas.","freezeMeaning":"Freeze is an immutable research input release; it does not promote provisional sources, close deferred source gates, establish causality or validate accident/claims prediction.","outcomesUsed":false,"predictiveValidation":false,"claimsValidation":false,"browserVerification":{"status":"not_performed","reason":"Managed execution environment has no supported control-browser capability. Desktop/mobile navigation, map clicking and interactive lookup were not browser-tested. Build, data, lookup logic and HTTP download checks are separate."}}