{"version":"ew-v4","featureVintages":[{"feature":"no_qualifications","sourceVersion":"ew-v1","source":"ts067","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts067.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-10T00:00:00.000Z","availableFrom":"2023-01-10T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Highest level of qualification: Total: All usual residents aged 16 years and over","formula":"100 × (Highest level of qualification: No qualifications) / (Highest level of qualification: Total: All usual residents aged 16 years and over)","licence":"Open Government Licence v3.0","limits":"Residents aged 16+. Not age-adjusted; age composition is a separate control."},{"feature":"level4_qualifications","sourceVersion":"ew-v1","source":"ts067","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts067.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-10T00:00:00.000Z","availableFrom":"2023-01-10T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Highest level of qualification: Total: All usual residents aged 16 years and over","formula":"100 × (Highest level of qualification: Level 4 qualifications and above) / (Highest level of qualification: Total: All usual residents aged 16 years and over)","licence":"Open Government Licence v3.0","limits":""},{"feature":"social_rented","sourceVersion":"ew-v1","source":"ts054","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts054.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Tenure of household: Total: All households","formula":"100 × (Tenure of household: Social rented: Rents from council or Local Authority + Tenure of household: Social rented: Other social rented) / (Tenure of household: Total: All households)","licence":"Open Government Licence v3.0","limits":"Council plus other social rent; do not add their parent category again."},{"feature":"private_rented","sourceVersion":"ew-v1","source":"ts054","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts054.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Tenure of household: Total: All households","formula":"100 × (Tenure of household: Private rented) / (Tenure of household: Total: All households)","licence":"Open Government Licence v3.0","limits":""},{"feature":"owner_occupied","sourceVersion":"ew-v1","source":"ts054","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts054.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Tenure of household: Total: All households","formula":"100 × (Tenure of household: Owned) / (Tenure of household: Total: All households)","licence":"Open Government Licence v3.0","limits":"Owned outright or with mortgage; shared ownership excluded. Tenure shares are dependent."},{"feature":"overcrowded_bedrooms","sourceVersion":"ew-v1","source":"ts052","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts052.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Occupancy rating for bedrooms: Total: All households","formula":"100 × (Occupancy rating for bedrooms: Occupancy rating of bedrooms: -1 + Occupancy rating for bedrooms: Occupancy rating of bedrooms: -2 or less) / (Occupancy rating for bedrooms: Total: All households)","licence":"Open Government Licence v3.0","limits":"Bedroom occupancy rating -1 or -2 or less. Household denominator."},{"feature":"unemployment","sourceVersion":"ew-v1","source":"ts066","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts066.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2022-12-08T00:00:00.000Z","availableFrom":"2022-12-08T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Economic activity status: Economically active (excluding full-time students) + Economic activity status: Economically active and a full-time student","formula":"100 × (Economic activity status: Economically active (excluding full-time students): Unemployed + Economic activity status: Economically active and a full-time student: Unemployed) / (Economic activity status: Economically active (excluding full-time students) + Economic activity status: Economically active and a full-time student)","licence":"Open Government Licence v3.0","limits":"Includes economically active full-time students in numerator and denominator. Census lockdown-era measure."},{"feature":"terraced","sourceVersion":"ew-v1","source":"ts044","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts044.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Accommodation type: Total: All households","formula":"100 × (Accommodation type: Terraced) / (Accommodation type: Total: All households)","licence":"Open Government Licence v3.0","limits":"Housing context; not measured on-street parking."},{"feature":"flats","sourceVersion":"ew-v1","source":"ts044","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts044.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Accommodation type: Total: All households","formula":"100 × (Accommodation type: In a purpose-built block of flats or tenement + Accommodation type: Part of a converted or shared house, including bedsits + Accommodation type: Part of another converted building, for example, former school, church or warehouse + Accommodation type: In a commercial building, for example, in an office building, hotel or over a shop) / (Accommodation type: Total: All households)","licence":"Open Government Licence v3.0","limits":"Purpose-built, converted/shared houses, converted buildings and commercial buildings. Not observed garaging."},{"feature":"no_car","sourceVersion":"ew-v1","source":"ts045","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts045.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Number of cars or vans: Total: All households","formula":"100 × (Number of cars or vans: No cars or vans in household) / (Number of cars or vans: Total: All households)","licence":"Open Government Licence v3.0","limits":"Household availability, not distance driven."},{"feature":"cars_per_household_lower_bound","sourceVersion":"ew-v1","source":"ts045","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts045.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Number of cars or vans: Total: All households","formula":"(Number of cars or vans: 1 car or van in household + 2 × Number of cars or vans: 2 cars or vans in household + 3 × Number of cars or vans: 3 or more cars or vans in household) / (Number of cars or vans: Total: All households)","licence":"Open Government Licence v3.0","limits":"Top-coded 3+ category is assigned 3. This is a lower bound, not an exact vehicle count."},{"feature":"population_density","sourceVersion":"ew-v1","source":"ts006","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts006.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2022-12-13T00:00:00.000Z","availableFrom":"2022-12-13T00:00:00.000Z","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Published land area in km²; unchanged Census density, not reconstructed from another table.","formula":"Unchanged published Census population density in people per square kilometre.","licence":"Open Government Licence v3.0","limits":""},{"feature":"age15_24","sourceVersion":"ew-v1","source":"ts007a","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts007a.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Age: Total","formula":"100 × (Age: Aged 15 to 19 years + Age: Aged 20 to 24 years) / (Age: Total)","licence":"Open Government Licence v3.0","limits":"Five-year Census bands; not a 17–24 driver-age measure."},{"feature":"age65_plus","sourceVersion":"ew-v1","source":"ts007a","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts007a.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Age: Total","formula":"100 × (Age: Aged 65 to 69 years + Age: Aged 70 to 74 years + Age: Aged 75 to 79 years + Age: Aged 80 to 84 years + Age: Aged 85 years and over) / (Age: Total)","licence":"Open Government Licence v3.0","limits":""},{"feature":"age0_14","sourceVersion":"ew-v1","source":"ts007a","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts007a.zip","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"2021-03-21","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Age: Total","formula":"100 × (Age: Aged 4 years and under + Age: Aged 5 to 9 years + Age: Aged 10 to 14 years) / (Age: Total)","licence":"Open Government Licence v3.0","limits":""},{"feature":"motorway_share","sourceVersion":"ew-v1","source":"os-roads","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","sourceRegisterUrl":"/research/ew-deciles/v1/road-source-register.json","observationPeriod":"2026-04","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Mapped non-fictitious OS roadMetres, including restricted/private roads; converted to km for node densities.","formula":"100 × motorwayMetres / roadMetres","licence":"Open Government Licence v3.0","limits":"Zero group plus positive-value deciles. Physical road length, not mileage."},{"feature":"a_road_share","sourceVersion":"ew-v1","source":"os-roads","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","sourceRegisterUrl":"/research/ew-deciles/v1/road-source-register.json","observationPeriod":"2026-04","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Mapped non-fictitious OS roadMetres, including restricted/private roads; converted to km for node densities.","formula":"100 × aRoadMetres / roadMetres","licence":"Open Government Licence v3.0","limits":"Zero group plus positive-value deciles. OS function field."},{"feature":"minor_road_share","sourceVersion":"ew-v1","source":"os-roads","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","sourceRegisterUrl":"/research/ew-deciles/v1/road-source-register.json","observationPeriod":"2026-04","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Mapped non-fictitious OS roadMetres, including restricted/private roads; converted to km for node densities.","formula":"100 × minorMetres / roadMetres","licence":"Open Government Licence v3.0","limits":"B, minor, local and access-road functions, including restricted access. Not traffic-weighted."},{"feature":"junction_density","sourceVersion":"ew-v1","source":"os-roads","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","sourceRegisterUrl":"/research/ew-deciles/v1/road-source-register.json","observationPeriod":"2026-04","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Mapped non-fictitious OS roadMetres, including restricted/private roads; converted to km for node densities.","formula":"1000 × junctions / roadMetres","licence":"Open Government Licence v3.0","limits":"OS junction nodes only. Pseudo nodes, road ends and roundabout nodes excluded."},{"feature":"roundabout_density","sourceVersion":"ew-v1","source":"os-roads","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","sourceRegisterUrl":"/research/ew-deciles/v1/road-source-register.json","observationPeriod":"2026-04","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Mapped non-fictitious OS roadMetres, including restricted/private roads; converted to km for node densities.","formula":"1000 × roundabouts / roadMetres","licence":"Open Government Licence v3.0","limits":"OS roundabout node count; zero group plus positive-value deciles. Not a manually audited roundabout inventory."},{"feature":"road_sinuosity","sourceVersion":"ew-v1","source":"os-roads","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","sourceRegisterUrl":"/research/ew-deciles/v1/road-source-register.json","observationPeriod":"2026-04","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"sinuosityEligibleMetres (eligible non-closed, non-roundabout links)","formula":"sinuosityWeightedMetres / sinuosityEligibleMetres","licence":"Open Government Licence v3.0","limits":"Length-weighted full-link length/endpoint distance, excluding closed and roundabout links. Generalised geometry proxy; not bend radius."},{"feature":"air_frost_normal","sourceVersion":"ew-v1","source":"metoffice-frost","sourceUrl":"https://www.arcgis.com/home/item.html?id=4d5f49b8e0de4119a4579444aed5f6a0","sourceRegisterUrl":"/research/ew-deciles/v1/road-source-register.json","observationPeriod":"1991–2020","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Mapped road metres covered by the observed 2 km climate grid; >=99% coverage required.","formula":"frostWeightedMetres / frostCoveredMetres; at least 99% mapped-road coverage","licence":"Open Government Licence v3.0","limits":"1991–2020 normal, public 2 km HadUK-Grid v1.1.0.0. At least 99% mapped road coverage. Not road ice or annual 2022–2025 weather."},{"feature":"claimant_rate","sourceVersion":"ew-v1","source":"https://www.nomisweb.co.uk/sources/claimant_count","sourceUrl":"https://www.nomisweb.co.uk/sources/claimant_count","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"monthly; target forecast origin minus publication lag","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Claimants / matched working-age population","formula":"Claimants / matched working-age population","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Small-area series, revisions, definition and matched denominator not yet frozen for both countries."},{"feature":"claimant_change","sourceVersion":"ew-v1","source":"https://www.nomisweb.co.uk/sources/claimant_count","sourceUrl":"https://www.nomisweb.co.uk/sources/claimant_count","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"monthly; lagged 12-month change","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Percentage-point change in the same claimant rate","formula":"Percentage-point change in the same claimant rate","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Requires the same comparable claimant series and denominator as claimant_rate."},{"feature":"income_deprivation","sourceVersion":"ew-v1","source":"https://www.gov.wales/welsh-index-multiple-deprivation-wimd-2025-guidance-html","sourceUrl":"https://www.gov.wales/welsh-index-multiple-deprivation-wimd-2025-guidance-html","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"edition-specific","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Common benefit coverage / common population denominator","formula":"Common benefit coverage / common population denominator","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"English IMD and Welsh WIMD are not comparable. Benefit coverage, denominators and periods are unreconciled. Native ranks are not pooled."},{"feature":"employment_deprivation","sourceVersion":"ew-v1","source":"https://www.gov.uk/government/statistics/english-indices-of-deprivation-2025","sourceUrl":"https://www.gov.uk/government/statistics/english-indices-of-deprivation-2025","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"edition-specific","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Common eligible claimant count / common working-age denominator","formula":"Common eligible claimant count / common working-age denominator","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Country-specific constructions unreconciled. Census unemployment is retained as a separate measure, not a replacement deprivation index."},{"feature":"road_gradient","sourceVersion":"ew-v1","source":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","sourceUrl":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"source edition at forecast origin","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Length-weighted absolute slope","formula":"Length-weighted absolute slope","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Terrain grid not acquired or bridge/tunnel treatment validated across both countries."},{"feature":"steep_road_share","sourceVersion":"ew-v1","source":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","sourceUrl":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"source edition at forecast origin","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Road length above prespecified gradient / valid road length","formula":"Road length above prespecified gradient / valid road length","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Requires terrain, sampling interval and fixed gradient threshold before calculation."},{"feature":"hgv_share","sourceVersion":"ew-v1","source":"https://roadtraffic.dft.gov.uk/downloads","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged annual","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: HGV miles / all-motor miles","formula":"HGV miles / all-motor miles","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"National all-road LSOA vehicle-class allocation not validated. Existing major-road counts and regional mileage are insufficient."},{"feature":"van_share","sourceVersion":"ew-v1","source":"https://roadtraffic.dft.gov.uk/downloads","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged annual","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: LGV miles / all-motor miles","formula":"LGV miles / all-motor miles","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Same national all-road vehicle-mix gap; retain counted/estimated flags."},{"feature":"motorcycle_share","sourceVersion":"ew-v1","source":"https://roadtraffic.dft.gov.uk/downloads","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged annual","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Motorcycle miles / all-motor miles","formula":"Motorcycle miles / all-motor miles","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Same national all-road vehicle-mix gap; collision-involved vehicles must not supply this feature."},{"feature":"bus_share","sourceVersion":"ew-v1","source":"https://roadtraffic.dft.gov.uk/downloads","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged annual","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Bus and coach miles / all-motor miles","formula":"Bus and coach miles / all-motor miles","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Same national all-road vehicle-mix gap."},{"feature":"flow_intensity","sourceVersion":"ew-v1","source":"https://roadtraffic.dft.gov.uk/downloads","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged annual","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Motor miles / mapped public-road length / days","formula":"Motor miles / mapped public-road length / days","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"National all-road LSOA exposure remains a Phase 3 dependency. Physical OS road length is not a traffic estimate."},{"feature":"school_density","sourceVersion":"ew-v1","source":"https://www.gov.wales/addresses-and-phone-numbers-schools-and-pupil-referral-units","sourceUrl":"https://www.gov.wales/addresses-and-phone-numbers-schools-and-pupil-referral-units","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"matched English and Welsh editions","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Comparable open schools within fixed road buffer / road km","formula":"Comparable open schools within fixed road buffer / road km","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"English GIAS and Welsh school extracts not yet harmonised; categories, dates and road buffer remain to be frozen."},{"feature":"stop_density","sourceVersion":"ew-v1","source":"https://www.gov.uk/government/publications/national-public-transport-access-node-schema","sourceUrl":"https://www.gov.uk/government/publications/national-public-transport-access-node-schema","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"snapshot at forecast origin","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Eligible active NaPTAN stops within fixed road buffer / road km","formula":"Eligible active NaPTAN stops within fixed road buffer / road km","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Active stop types, duplicates, access points and buffer rule not yet frozen nationally."},{"feature":"snow_lying","sourceVersion":"ew-v1","source":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged observations or prior climatology","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Road-length-weighted mean days","formula":"Road-length-weighted mean days","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Required national snow grid has not been acquired. No proxy snow values are substituted."},{"feature":"heavy_rain","sourceVersion":"ew-v1","source":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged daily observations","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Road-length-weighted days above prespecified rainfall threshold","formula":"Road-length-weighted days above prespecified rainfall threshold","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Daily rainfall and threshold not frozen; latest CEDA source acquisition remains open."},{"feature":"rain_intensity","sourceVersion":"ew-v1","source":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","sourceRegisterUrl":"/research/ew-deciles/v1/source-register.json","observationPeriod":"lagged observations or prior climatology","releasedAt":null,"availableFrom":null,"retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Not frozen; proposed definition: Road-length-weighted rainfall","formula":"Road-length-weighted rainfall","licence":"Expected public-data licence; exact extract terms not yet verified","limits":"Required rainfall grid not acquired. Same-year explanatory weather must remain distinct from prospective features."},{"feature":"multi_car","sourceVersion":"ew-v2","source":"ts045","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts045.zip","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Number of cars or vans: Total: All households","formula":"100 × sum(numerator categories) / sum(denominator categories)","licence":"Open Government Licence v3.0","limits":"Includes top-coded 3+ households. Availability, not miles driven."},{"feature":"three_plus_car","sourceVersion":"ew-v2","source":"ts045","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts045.zip","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2023-01-06T00:00:00.000Z","availableFrom":"2023-01-06","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Number of cars or vans: Total: All households","formula":"100 × sum(numerator categories) / sum(denominator categories)","licence":"Open Government Licence v3.0","limits":"Top-coded 3+ category retained; nested within multi-car households."},{"feature":"car_commute","sourceVersion":"ew-v2","source":"ts061","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts061.zip","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2022-12-08T00:00:00.000Z","availableFrom":"2022-12-08","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Method of travel to workplace: Underground, metro, light rail, tram + Method of travel to workplace: Train + Method of travel to workplace: Bus, minibus or coach + Method of travel to workplace: Taxi + Method of travel to workplace: Motorcycle, scooter or moped + Method of travel to workplace: Driving a car or van + Method of travel to workplace: Passenger in a car or van + Method of travel to workplace: Bicycle + Method of travel to workplace: On foot + Method of travel to workplace: Other method of travel to work","formula":"100 × sum(numerator categories) / sum(denominator categories)","licence":"Open Government Licence v3.0","limits":"Census 2021 lockdown/furlough context. Resident participation, not current travel, hybrid-working frequency or observed road flows. Denominator sums all ten away-from-home travel categories, including passengers and other methods."},{"feature":"long_commute","sourceVersion":"ew-v2","source":"ts058","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts058.zip","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2022-12-08T00:00:00.000Z","availableFrom":"2022-12-08","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Distance travelled to work: Less than 2km + Distance travelled to work: 2km to less than 5km + Distance travelled to work: 5km to less than 10km + Distance travelled to work: 10km to less than 20km + Distance travelled to work: 20km to less than 30km + Distance travelled to work: 30km to less than 40km + Distance travelled to work: 40km to less than 60km + Distance travelled to work: 60km and over","formula":"100 × sum(numerator categories) / sum(denominator categories)","licence":"Open Government Licence v3.0","limits":"Census 2021 lockdown/furlough context. Resident participation, not current travel, hybrid-working frequency or observed road flows. Straight-line distance. Denominator includes only the eight known distance bands; excludes home/offshore/no fixed place/outside UK."},{"feature":"work_from_home","sourceVersion":"ew-v2","source":"ts061","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts061.zip","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2022-12-08T00:00:00.000Z","availableFrom":"2022-12-08","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Method of travel to workplace: Total: All usual residents aged 16 years and over in employment the week before the census","formula":"100 × sum(numerator categories) / sum(denominator categories)","licence":"Open Government Licence v3.0","limits":"Census 2021 lockdown/furlough context. Resident participation, not current travel, hybrid-working frequency or observed road flows. Denominator is all employed residents aged 16+ in TS061."},{"feature":"walk_commute","sourceVersion":"ew-v2","source":"ts061","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts061.zip","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2022-12-08T00:00:00.000Z","availableFrom":"2022-12-08","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Method of travel to workplace: Underground, metro, light rail, tram + Method of travel to workplace: Train + Method of travel to workplace: Bus, minibus or coach + Method of travel to workplace: Taxi + Method of travel to workplace: Motorcycle, scooter or moped + Method of travel to workplace: Driving a car or van + Method of travel to workplace: Passenger in a car or van + Method of travel to workplace: Bicycle + Method of travel to workplace: On foot + Method of travel to workplace: Other method of travel to work","formula":"100 × sum(numerator categories) / sum(denominator categories)","licence":"Open Government Licence v3.0","limits":"Census 2021 lockdown/furlough context. Resident participation, not current travel, hybrid-working frequency or observed road flows. Share among residents travelling away from home, not pedestrian pressure in this LSOA."},{"feature":"cycle_commute","sourceVersion":"ew-v2","source":"ts061","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts061.zip","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"2021-03-21","releasedAt":"2022-12-08T00:00:00.000Z","availableFrom":"2022-12-08","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Method of travel to workplace: Underground, metro, light rail, tram + Method of travel to workplace: Train + Method of travel to workplace: Bus, minibus or coach + Method of travel to workplace: Taxi + Method of travel to workplace: Motorcycle, scooter or moped + Method of travel to workplace: Driving a car or van + Method of travel to workplace: Passenger in a car or van + Method of travel to workplace: Bicycle + Method of travel to workplace: On foot + Method of travel to workplace: Other method of travel to work","formula":"100 × sum(numerator categories) / sum(denominator categories)","licence":"Open Government Licence v3.0","limits":"Census 2021 lockdown/furlough context. Resident participation, not current travel, hybrid-working frequency or observed road flows. Share among residents travelling away from home, not cyclist pressure in this LSOA."},{"feature":"connectivity_public_transport","sourceVersion":"ew-v2","source":"dft-connectivity-2025","sourceUrl":"https://assets.publishing.service.gov.uk/media/68c966fc07d9e92bc5517b80/connectivity_metrics_2025.ods","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"Q4 2024 reference; mixed source vintages","releasedAt":"2025-09-29","availableFrom":"2025-09-29","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"None: unchanged published score, already population-weighted by DfT","formula":"Published LSOA Overall (public transport) score, unchanged; rank nationally within this mode","licence":"Open Government Licence v3.0; GOV.UK publication terms","limits":"Modelled access to destinations, not trips or flows. Q4 2024 workbook reference; mixed 2023–2025 inputs and NTS 2011–2020 preferences. Scores from different modes are not directly comparable. Published 29 September 2025."},{"feature":"connectivity_walking","sourceVersion":"ew-v2","source":"dft-connectivity-2025","sourceUrl":"https://assets.publishing.service.gov.uk/media/68c966fc07d9e92bc5517b80/connectivity_metrics_2025.ods","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"Q4 2024 reference; mixed source vintages","releasedAt":"2025-09-29","availableFrom":"2025-09-29","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"None: unchanged published score, already population-weighted by DfT","formula":"Published LSOA Overall (walking) score, unchanged; rank nationally within this mode","licence":"Open Government Licence v3.0; GOV.UK publication terms","limits":"Modelled access to destinations, not trips or flows. Q4 2024 workbook reference; mixed 2023–2025 inputs and NTS 2011–2020 preferences. Scores from different modes are not directly comparable. Published 29 September 2025."},{"feature":"connectivity_cycling","sourceVersion":"ew-v2","source":"dft-connectivity-2025","sourceUrl":"https://assets.publishing.service.gov.uk/media/68c966fc07d9e92bc5517b80/connectivity_metrics_2025.ods","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"Q4 2024 reference; mixed source vintages","releasedAt":"2025-09-29","availableFrom":"2025-09-29","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"None: unchanged published score, already population-weighted by DfT","formula":"Published LSOA Overall (cycling) score, unchanged; rank nationally within this mode","licence":"Open Government Licence v3.0; GOV.UK publication terms","limits":"Modelled access to destinations, not trips or flows. Q4 2024 workbook reference; mixed 2023–2025 inputs and NTS 2011–2020 preferences. Scores from different modes are not directly comparable. Published 29 September 2025."},{"feature":"connectivity_driving","sourceVersion":"ew-v2","source":"dft-connectivity-2025","sourceUrl":"https://assets.publishing.service.gov.uk/media/68c966fc07d9e92bc5517b80/connectivity_metrics_2025.ods","sourceRegisterUrl":"/research/ew-deciles/v2/source-register.json","observationPeriod":"Q4 2024 reference; mixed source vintages","releasedAt":"2025-09-29","availableFrom":"2025-09-29","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"None: unchanged published score, already population-weighted by DfT","formula":"Published LSOA Overall (driving) score, unchanged; rank nationally within this mode","licence":"Open Government Licence v3.0; GOV.UK publication terms","limits":"Modelled access to destinations, not trips or flows. Q4 2024 workbook reference; mixed 2023–2025 inputs and NTS 2011–2020 preferences. Scores from different modes are not directly comparable. Published 29 September 2025."},{"feature":"heat_days_25","sourceVersion":"ew-v3","source":"HadUK-Grid daily Tmax","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"1991–2020 normal; annual 2022–2025 separately","releasedAt":"2026-06-23","availableFrom":"2026-06-23","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Covered mapped road metres","formula":"Sum road metres × grid annual count(Tmax ≥25°C) / covered road metres","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Exact inclusive threshold requires registered CEDA daily HadUK-Grid Tmax access. Access audit and complete-calendar parser supplied; no daily data acquired. The separately named >25°C normal does not replace this candidate."},{"feature":"heat_days_30","sourceVersion":"ew-v3","source":"HadUK-Grid daily Tmax","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"1991–2020 normal; annual 2022–2025 separately","releasedAt":"2026-06-23","availableFrom":"2026-06-23","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Covered mapped road metres","formula":"Sum road metres × grid annual count(Tmax ≥30°C) / covered road metres","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Exact inclusive threshold requires registered CEDA daily HadUK-Grid Tmax access. Access audit and complete-calendar parser supplied; no daily data acquired. The separately named >25°C normal does not replace this candidate."},{"feature":"air_no2","sourceVersion":"ew-v3","source":"Defra 2025 assessed annual 1 km concentrations","sourceUrl":"https://www.gov.uk/government/publications/air-quality-compliance-assessment-2025-modelled-data-and-reports","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"2025; 2022–2024 sensitivity files separate","releasedAt":"2026-10-09","availableFrom":"2026-10-09","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Covered mapped road metres","formula":"Sum road metres × annual assessed NO2 concentration / covered road metres","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Road-weighted assessed annual ambient concentrations, ≥99% mapped-road coverage; April 2026 OS geometry. 2025 CMAQ-Urban replaces PCM, so years are not pooled into one trend. These are model estimates, not individual or roadside-monitor exposure."},{"feature":"air_pm25","sourceVersion":"ew-v3","source":"Defra 2025 assessed annual 1 km concentrations","sourceUrl":"https://www.gov.uk/government/publications/air-quality-compliance-assessment-2025-modelled-data-and-reports","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"2025; 2022–2024 sensitivity files separate","releasedAt":"2026-10-09","availableFrom":"2026-10-09","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Covered mapped road metres","formula":"Sum road metres × annual assessed PM2.5 concentration / covered road metres","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Road-weighted assessed annual ambient concentrations, ≥99% mapped-road coverage; April 2026 OS geometry. 2025 CMAQ-Urban replaces PCM, so years are not pooled into one trend. These are model estimates, not individual or roadside-monitor exposure."},{"feature":"vehicle_crime","sourceVersion":"ew-v3","source":"Police.uk frozen August 2026 archive","sourceUrl":"https://data.police.uk/data/archive/2026-08.zip","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"September 2023–August 2026 (36 months)","releasedAt":"2026-09-30","availableFrom":"2026-09-30","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Census 2021 households","formula":"1000 × eligible own-force 36-month category count / 3 / Census 2021 denominator","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Diagnostic own-territorial-force geolocated incidents; complete 36-month reporting and no contradictory Crime-ID allocation required. Census 2021 denominator is a frozen context proxy. Other-force/BTP and unlocated incidents are audited separately. National bands withheld because the national crime reference is incomplete. Vehicle crime includes theft of/from vehicles and interference; not theft only."},{"feature":"burglary","sourceVersion":"ew-v3","source":"Police.uk frozen August 2026 archive","sourceUrl":"https://data.police.uk/data/archive/2026-08.zip","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"September 2023–August 2026 (36 months)","releasedAt":"2026-09-30","availableFrom":"2026-09-30","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Census 2021 households","formula":"1000 × eligible own-force 36-month category count / 3 / Census 2021 denominator","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Diagnostic own-territorial-force geolocated incidents; complete 36-month reporting and no contradictory Crime-ID allocation required. Census 2021 denominator is a frozen context proxy. Other-force/BTP and unlocated incidents are audited separately. National bands withheld because the national crime reference is incomplete. Published burglary is not wholly residential."},{"feature":"criminal_damage_arson","sourceVersion":"ew-v3","source":"Police.uk frozen August 2026 archive","sourceUrl":"https://data.police.uk/data/archive/2026-08.zip","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"September 2023–August 2026 (36 months)","releasedAt":"2026-09-30","availableFrom":"2026-09-30","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Census 2021 usual residents","formula":"1000 × eligible own-force 36-month category count / 3 / Census 2021 denominator","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Diagnostic own-territorial-force geolocated incidents; complete 36-month reporting and no contradictory Crime-ID allocation required. Census 2021 denominator is a frozen context proxy. Other-force/BTP and unlocated incidents are audited separately. National bands withheld because the national crime reference is incomplete. "},{"feature":"non_vehicle_crime","sourceVersion":"ew-v3","source":"Police.uk frozen August 2026 archive","sourceUrl":"https://data.police.uk/data/archive/2026-08.zip","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"September 2023–August 2026 (36 months)","releasedAt":"2026-09-30","availableFrom":"2026-09-30","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Census 2021 usual residents","formula":"1000 × eligible own-force 36-month category count / 3 / Census 2021 denominator","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Diagnostic own-territorial-force geolocated incidents; complete 36-month reporting and no contradictory Crime-ID allocation required. Census 2021 denominator is a frozen context proxy. Other-force/BTP and unlocated incidents are audited separately. National bands withheld because the national crime reference is incomplete. Non-vehicle excludes vehicle crime and ASB; burglary and damage/arson overlap this total."},{"feature":"speed_le20","sourceVersion":"ew-v3","source":"Geofabrik OpenStreetMap England and Wales 2026-10-11","sourceUrl":"https://download.geofabrik.de/europe/united-kingdom.html","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"2026-10-11T20:21:06Z","releasedAt":"2026-10-11","availableFrom":"2026-10-11","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Classified eligible public motor-road length","formula":"100 × eligible road length with classified limit ≤20 mph / classified eligible road length","licence":"Open Database Licence 1.0; © OpenStreetMap contributors. See speed-audit.json.","limits":"Share of classified eligible public motor-road length; ≥95% classified-length gate. Untagged, unresolved conditional/directional and variable limits remain unknown; bounds against all roads are supplied. No collision-derived limits. Authority segment validation remains outstanding. Current Welsh limits must not be backdated to before September 2023. Only 1,547 areas pass the tag-coverage gate (1,520 urban; 27 rural); primary national bands are withheld because this 4.3% coverage-selected reference is not representative."},{"feature":"speed_le30","sourceVersion":"ew-v3","source":"Geofabrik OpenStreetMap England and Wales 2026-10-11","sourceUrl":"https://download.geofabrik.de/europe/united-kingdom.html","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"2026-10-11T20:21:06Z","releasedAt":"2026-10-11","availableFrom":"2026-10-11","retrievedAt":"2026-10-12","bandsFrozenAt":null,"historicalAsOf2022Eligible":false,"denominatorDefinition":"Classified eligible public motor-road length","formula":"100 × eligible road length with classified limit ≤30 mph / classified eligible road length","licence":"Open Database Licence 1.0; © OpenStreetMap contributors. See speed-audit.json.","limits":"Share of classified eligible public motor-road length; ≥95% classified-length gate. Untagged, unresolved conditional/directional and variable limits remain unknown; bounds against all roads are supplied. No collision-derived limits. Authority segment validation remains outstanding. Current Welsh limits must not be backdated to before September 2023. Only 1,547 areas pass the tag-coverage gate (1,520 urban; 27 rural); primary national bands are withheld because this 4.3% coverage-selected reference is not representative."},{"feature":"bankruptcy_la","sourceVersion":"ew-v3","source":"Insolvency Service 2025 location workbook","sourceUrl":"https://www.gov.uk/government/statistics/individual-insolvencies-by-location-age-and-gender-england-and-wales-2025","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"2025 events; mid-2024 adult denominator","releasedAt":"2026-03-27","availableFrom":"2026-03-27","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Publisher mid-2024 adults aged 18+. Exact counts not supplied; use published source rate without reconstructing a denominator.","formula":"Published annual bankruptcies per 10,000 adults, inherited from source reporting area","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Published 2025 rate inherited from 316 lower-tier reporting areas, with no within-area variation. Provisional because the publisher used mid-2024 adults. City of London is combined with Westminster; Isles of Scilly with Cornwall. National LSOA-weighted ties remain together; authority-weighted sensitivity is supplied."},{"feature":"insolvency_la","sourceVersion":"ew-v3","source":"Insolvency Service 2025 location workbook","sourceUrl":"https://www.gov.uk/government/statistics/individual-insolvencies-by-location-age-and-gender-england-and-wales-2025","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"2025 events; mid-2024 adult denominator","releasedAt":"2026-03-27","availableFrom":"2026-03-27","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Publisher mid-2024 adults aged 18+. Exact counts not supplied; use published source rate without reconstructing a denominator.","formula":"Published annual (bankruptcies + DROs + IVAs) per 10,000 adults, inherited from source reporting area","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Published 2025 rate inherited from 316 lower-tier reporting areas, with no within-area variation. Provisional because the publisher used mid-2024 adults. City of London is combined with Westminster; Isles of Scilly with Cornwall. National LSOA-weighted ties remain together; authority-weighted sensitivity is supplied."},{"feature":"heat_summer_days_gt25","sourceVersion":"ew-v3","source":"Met Office observed summer-days 2 km grid","sourceUrl":"https://www.arcgis.com/home/item.html?id=439d540451ca46ad892a0a2c72b29ce9","sourceRegisterUrl":"/research/ew-deciles/v3/source-register.json","observationPeriod":"1991–2020 climate normal","releasedAt":"2022-03-15","availableFrom":"2022-03-15","retrievedAt":"2026-10-12","bandsFrozenAt":"2026-10-12","historicalAsOf2022Eligible":false,"denominatorDefinition":"Covered mapped road metres","formula":"sum(road metres × grid mean annual days with Tmax >25°C) / covered road metres","licence":"Open Government Licence v3.0; source-specific attribution in audits.","limits":"Observed 1991–2020 mean annual days strictly >25°C, road-weighted using April 2026 mapped roads; ≥99% road coverage. This is not the planned ≥25°C threshold or annual post-pandemic heat. Public HadUK-Grid v1.1.0.0; geometry matched all 63,296 frozen frost-grid cells."}],"registers":[{"url":"/research/ew-deciles/v1/source-register.json","bytes":18146,"sha256":"debef31df5a2299cf9b307a662fb24393dfd24c98f8bd1bc7cd826c881d8779e"},{"url":"/research/ew-deciles/v1/road-source-register.json","bytes":4608,"sha256":"01a2345cc692131cc5722bb14d0876e577b82ec406aefa1fa05483a46b28e0ed"},{"url":"/research/ew-deciles/v2/source-register.json","bytes":4495,"sha256":"4764c1ae21b3b0168cd300b4871bba898456748683cfa7f9e5f731c2d471cd30"},{"url":"/research/ew-deciles/v3/source-register.json","bytes":8888,"sha256":"9e940fab50c7ba4b8ca202376abb540e5ea426eeba661b70ea00828fb2a7cfbc"},{"url":"/research/ew-deciles/v3/air-source-register.json","bytes":6531,"sha256":"bec32d235661f2ba6fb02b0c18ceb1a2413333abf8d603219eee7bafbeae17b9"}],"sourceHashInventory":"freeze-inputs.json","licences":"Source-specific licences remain in force. Official sources generally OGL v3.0. OSM-derived speed data: ODbL 1.0, © OpenStreetMap contributors. No blanket licence substitution."}