{"version":"ew-v1","decisions":[{"family":"Census 2021","decision":"Combined","reason":"Common census day, geography, categories and within-table denominators. Disclosure control can cause differences across table totals; no cross-table rescaling. Frozen Nomis bulk edition, not certified latest API revision."},{"family":"Deprivation","decision":"Deferred","reason":"Do not combine national IMD/WIMD ranks. Raw component comparability has not been established. Overall IMD/living environment excluded due to outcome overlap."},{"family":"Road layout","decision":"Combined","reason":"Same April 2026 OS release and full-resolution ONS boundary allocation. Restricted/private physical roads included; no claim of public-road mileage."},{"family":"Frost","decision":"Provisional combined","reason":"Same public 2 km climatology and road weights; source-only eligibility at >=99% road coverage. Full master retained. Annual weather and latest 1 km upgrade absent."},{"family":"Traffic, terrain, claimants, activity and other weather","decision":"Deferred","reason":"See individual feature dictionary for the unresolved source, definition or national allocation gate."},{"family":"Geography changes","decision":"Exact 2021 geography","reason":"No historical code interpolation in this release. UTLA2023 retained as labelled. Future crosswalks must redistribute counts/weights and recalculate raw rates, never average deciles."}]}