{"version":"ew-v1","features":[{"id":"no_qualifications","label":"No qualifications","family":"Socio-demographic","source":"ts067","numerator":[4],"denominator":[3],"unit":"%","role":"candidate","note":"Residents aged 16+. Not age-adjusted; age composition is a separate control.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Highest level of qualification: No qualifications","weight":1}],"denominatorColumns":["Highest level of qualification: Total: All usual residents aged 16 years and over"],"releasedAt":"2023-01-10T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts067.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"level4_qualifications","label":"Level 4+ qualifications","family":"Socio-demographic","source":"ts067","numerator":[9],"denominator":[3],"unit":"%","role":"candidate","note":"","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Highest level of qualification: Level 4 qualifications and above","weight":1}],"denominatorColumns":["Highest level of qualification: Total: All usual residents aged 16 years and over"],"releasedAt":"2023-01-10T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts067.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"social_rented","label":"Social rented households","family":"Socio-demographic","source":"ts054","numerator":[10,11],"denominator":[3],"unit":"%","role":"candidate","note":"Council plus other social rent; do not add their parent category again.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Tenure of household: Social rented: Rents from council or Local Authority","weight":1},{"column":"Tenure of household: Social rented: Other social rented","weight":1}],"denominatorColumns":["Tenure of household: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts054.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"private_rented","label":"Private rented households","family":"Socio-demographic","source":"ts054","numerator":[12],"denominator":[3],"unit":"%","role":"candidate","note":"","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Tenure of household: Private rented","weight":1}],"denominatorColumns":["Tenure of household: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts054.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"owner_occupied","label":"Owner occupied households","family":"Socio-demographic","source":"ts054","numerator":[4],"denominator":[3],"unit":"%","role":"candidate","note":"Owned outright or with mortgage; shared ownership excluded. Tenure shares are dependent.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Tenure of household: Owned","weight":1}],"denominatorColumns":["Tenure of household: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts054.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"overcrowded_bedrooms","label":"Overcrowded households","family":"Socio-demographic","source":"ts052","numerator":[7,8],"denominator":[3],"unit":"%","role":"candidate","note":"Bedroom occupancy rating -1 or -2 or less. Household denominator.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Occupancy rating for bedrooms: Occupancy rating of bedrooms: -1","weight":1},{"column":"Occupancy rating for bedrooms: Occupancy rating of bedrooms: -2 or less","weight":1}],"denominatorColumns":["Occupancy rating for bedrooms: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts052.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"unemployment","label":"Unemployment among economically active adults","family":"Socio-demographic","source":"ts066","numerator":[15,27],"denominator":[4,16],"unit":"%","role":"candidate","note":"Includes economically active full-time students in numerator and denominator. Census lockdown-era measure.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Economic activity status: Economically active (excluding full-time students): Unemployed","weight":1},{"column":"Economic activity status: Economically active and a full-time student: Unemployed","weight":1}],"denominatorColumns":["Economic activity status: Economically active (excluding full-time students)","Economic activity status: Economically active and a full-time student"],"releasedAt":"2022-12-08T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts066.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"terraced","label":"Terraced housing","family":"Housing and vehicles","source":"ts044","numerator":[6],"denominator":[3],"unit":"%","role":"candidate","note":"Housing context; not measured on-street parking.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Accommodation type: Terraced","weight":1}],"denominatorColumns":["Accommodation type: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts044.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"flats","label":"Flats and converted/commercial accommodation","family":"Housing and vehicles","source":"ts044","numerator":[7,8,9,10],"denominator":[3],"unit":"%","role":"candidate","note":"Purpose-built, converted/shared houses, converted buildings and commercial buildings. Not observed garaging.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Accommodation type: In a purpose-built block of flats or tenement","weight":1},{"column":"Accommodation type: Part of a converted or shared house, including bedsits","weight":1},{"column":"Accommodation type: Part of another converted building, for example, former school, church or warehouse","weight":1},{"column":"Accommodation type: In a commercial building, for example, in an office building, hotel or over a shop","weight":1}],"denominatorColumns":["Accommodation type: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts044.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"no_car","label":"Households without a car or van","family":"Housing and vehicles","source":"ts045","numerator":[4],"denominator":[3],"unit":"%","role":"candidate","note":"Household availability, not distance driven.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Number of cars or vans: No cars or vans in household","weight":1}],"denominatorColumns":["Number of cars or vans: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts045.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"cars_per_household_lower_bound","label":"Cars/vans per household · lower bound","family":"Housing and vehicles","source":"ts045","numerator":[[5,1],[6,2],[7,3]],"denominator":[3],"unit":"vehicles/household","role":"candidate","note":"Top-coded 3+ category is assigned 3. This is a lower bound, not an exact vehicle count.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Number of cars or vans: 1 car or van in household","weight":1},{"column":"Number of cars or vans: 2 cars or vans in household","weight":2},{"column":"Number of cars or vans: 3 or more cars or vans in household","weight":3}],"denominatorColumns":["Number of cars or vans: Total: All households"],"releasedAt":"2023-01-06T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts045.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"population_density","label":"Population density","family":"Baseline controls","source":"ts006","numerator":[3],"denominator":[],"unit":"people/km²","role":"control","note":"","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Population Density: Persons per square kilometre; measures: Value","weight":1}],"denominatorColumns":[],"releasedAt":"2022-12-13T00:00:00.000Z","sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts006.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"age15_24","label":"Residents aged 15–24","family":"Baseline controls","source":"ts007a","numerator":[7,8],"denominator":[3],"unit":"%","role":"control","note":"Five-year Census bands; not a 17–24 driver-age measure.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Age: Aged 15 to 19 years","weight":1},{"column":"Age: Aged 20 to 24 years","weight":1}],"denominatorColumns":["Age: Total"],"releasedAt":null,"sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts007a.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"age65_plus","label":"Residents aged 65+","family":"Baseline controls","source":"ts007a","numerator":[17,18,19,20,21],"denominator":[3],"unit":"%","role":"control","note":"","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Age: Aged 65 to 69 years","weight":1},{"column":"Age: Aged 70 to 74 years","weight":1},{"column":"Age: Aged 75 to 79 years","weight":1},{"column":"Age: Aged 80 to 84 years","weight":1},{"column":"Age: Aged 85 years and over","weight":1}],"denominatorColumns":["Age: Total"],"releasedAt":null,"sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts007a.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"age0_14","label":"Residents aged 0–14","family":"Baseline controls","source":"ts007a","numerator":[4,5,6],"denominator":[3],"unit":"%","role":"control","note":"","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2021-03-21","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","numeratorColumns":[{"column":"Age: Aged 4 years and under","weight":1},{"column":"Age: Aged 5 to 9 years","weight":1},{"column":"Age: Aged 10 to 14 years","weight":1}],"denominatorColumns":["Age: Total"],"releasedAt":null,"sourceUrl":"https://www.nomisweb.co.uk/output/census/2021/census2021-ts007a.zip","validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"motorway_share","label":"Motorway share of mapped road length","family":"Road layout","source":"os-roads","numerator":["motorwayMetres"],"denominator":["roadMetres"],"unit":"%","role":"control","note":"Zero group plus positive-value deciles. Physical road length, not mileage.","status":"complete","zeroBand":true,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2026-04","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","releasedAt":null,"validCount":35672,"missingCount":0,"bandScheme":"Zero + positive deciles"},{"id":"a_road_share","label":"A-road share of mapped road length","family":"Road layout","source":"os-roads","numerator":["aRoadMetres"],"denominator":["roadMetres"],"unit":"%","role":"control","note":"Zero group plus positive-value deciles. OS function field.","status":"complete","zeroBand":true,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2026-04","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","releasedAt":null,"validCount":35672,"missingCount":0,"bandScheme":"Zero + positive deciles"},{"id":"minor_road_share","label":"Minor/local share of mapped road length","family":"Road layout","source":"os-roads","numerator":["minorMetres"],"denominator":["roadMetres"],"unit":"%","role":"control","note":"B, minor, local and access-road functions, including restricted access. Not traffic-weighted.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2026-04","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","releasedAt":null,"validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"junction_density","label":"Junctions per mapped road kilometre","family":"Road layout","source":"os-roads","numerator":["junctions"],"denominator":["roadMetres"],"unit":"junctions/km","role":"candidate","note":"OS junction nodes only. Pseudo nodes, road ends and roundabout nodes excluded.","status":"complete","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2026-04","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","releasedAt":null,"validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"roundabout_density","label":"Roundabout nodes per mapped road kilometre","family":"Road layout","source":"os-roads","numerator":["roundabouts"],"denominator":["roadMetres"],"unit":"nodes/km","role":"candidate","note":"OS roundabout node count; zero group plus positive-value deciles. Not a manually audited roundabout inventory.","status":"complete","zeroBand":true,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2026-04","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","releasedAt":null,"validCount":35672,"missingCount":0,"bandScheme":"Zero + positive deciles"},{"id":"road_sinuosity","label":"Mapped road sinuosity","family":"Road layout","source":"os-roads","numerator":["sinuosityWeightedMetres"],"denominator":["sinuosityEligibleMetres"],"unit":"ratio","role":"candidate","note":"Length-weighted full-link length/endpoint distance, excluding closed and roundabout links. Generalised geometry proxy; not bend radius.","status":"provisional","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"2026-04","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","sourceUrl":"https://api.os.uk/downloads/v1/products/OpenRoads/downloads?area=GB&format=ESRI%C2%AE+Shapefile&redirect","releasedAt":null,"validCount":35672,"missingCount":0,"bandScheme":"Combined E&W deciles"},{"id":"air_frost_normal","label":"Road-weighted air-frost days","family":"Weather","source":"metoffice-frost","numerator":["frostWeightedMetres"],"denominator":["frostCoveredMetres"],"unit":"days/year","role":"candidate","note":"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.","status":"provisional","zeroBand":false,"comparability":"Common source and calculation across England and Wales","direction":"Higher band = higher feature value; collision-risk direction has not been tested","observationPeriod":"1991–2020","geographicResolution":"LSOA2021, England and Wales","licence":"Open Government Licence v3.0","sourceStatus":"Frozen archived input","sourceUrl":"https://www.arcgis.com/home/item.html?id=4d5f49b8e0de4119a4579444aed5f6a0","releasedAt":null,"validCount":35365,"missingCount":307,"bandScheme":"Combined E&W deciles"},{"id":"claimant_rate","label":"Lagged Claimant Count rate","family":"Socio-demographic","source":"https://www.nomisweb.co.uk/sources/claimant_count","numerator":[],"denominator":[],"definition":"Claimants / matched working-age population","unit":"not yet frozen","role":"candidate","note":"Small-area series, revisions, definition and matched denominator not yet frozen for both countries.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"monthly; target forecast origin minus publication lag","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.nomisweb.co.uk/sources/claimant_count","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"claimant_change","label":"12-month Claimant Count change","family":"Socio-demographic","source":"https://www.nomisweb.co.uk/sources/claimant_count","numerator":[],"denominator":[],"definition":"Percentage-point change in the same claimant rate","unit":"not yet frozen","role":"candidate","note":"Requires the same comparable claimant series and denominator as claimant_rate.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"monthly; lagged 12-month change","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.nomisweb.co.uk/sources/claimant_count","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"income_deprivation","label":"Harmonised income deprivation","family":"Socio-demographic","source":"https://www.gov.wales/welsh-index-multiple-deprivation-wimd-2025-guidance-html","numerator":[],"denominator":[],"definition":"Common benefit coverage / common population denominator","unit":"not yet frozen","role":"candidate","note":"English IMD and Welsh WIMD are not comparable. Benefit coverage, denominators and periods are unreconciled. Native ranks are not pooled.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"edition-specific","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.gov.wales/welsh-index-multiple-deprivation-wimd-2025-guidance-html","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"employment_deprivation","label":"Harmonised employment deprivation","family":"Socio-demographic","source":"https://www.gov.uk/government/statistics/english-indices-of-deprivation-2025","numerator":[],"denominator":[],"definition":"Common eligible claimant count / common working-age denominator","unit":"not yet frozen","role":"candidate","note":"Country-specific constructions unreconciled. Census unemployment is retained as a separate measure, not a replacement deprivation index.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"edition-specific","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.gov.uk/government/statistics/english-indices-of-deprivation-2025","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"road_gradient","label":"Road-weighted gradient","family":"Road layout","source":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","numerator":[],"denominator":[],"definition":"Length-weighted absolute slope","unit":"not yet frozen","role":"candidate","note":"Terrain grid not acquired or bridge/tunnel treatment validated across both countries.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"source edition at forecast origin","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"steep_road_share","label":"Steep-road share","family":"Road layout","source":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","numerator":[],"denominator":[],"definition":"Road length above prespecified gradient / valid road length","unit":"not yet frozen","role":"candidate","note":"Requires terrain, sampling interval and fixed gradient threshold before calculation.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"source edition at forecast origin","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.ordnancesurvey.co.uk/products/os-terrain-50","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"hgv_share","label":"HGV traffic share","family":"Traffic and activity","source":"https://roadtraffic.dft.gov.uk/downloads","numerator":[],"denominator":[],"definition":"HGV miles / all-motor miles","unit":"not yet frozen","role":"candidate","note":"National all-road LSOA vehicle-class allocation not validated. Existing major-road counts and regional mileage are insufficient.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged annual","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"van_share","label":"Van traffic share","family":"Traffic and activity","source":"https://roadtraffic.dft.gov.uk/downloads","numerator":[],"denominator":[],"definition":"LGV miles / all-motor miles","unit":"not yet frozen","role":"candidate","note":"Same national all-road vehicle-mix gap; retain counted/estimated flags.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged annual","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"motorcycle_share","label":"Motorcycle traffic share","family":"Traffic and activity","source":"https://roadtraffic.dft.gov.uk/downloads","numerator":[],"denominator":[],"definition":"Motorcycle miles / all-motor miles","unit":"not yet frozen","role":"candidate","note":"Same national all-road vehicle-mix gap; collision-involved vehicles must not supply this feature.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged annual","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"bus_share","label":"Bus and coach traffic share","family":"Traffic and activity","source":"https://roadtraffic.dft.gov.uk/downloads","numerator":[],"denominator":[],"definition":"Bus and coach miles / all-motor miles","unit":"not yet frozen","role":"candidate","note":"Same national all-road vehicle-mix gap.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged annual","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"flow_intensity","label":"Motor traffic intensity","family":"Traffic and activity","source":"https://roadtraffic.dft.gov.uk/downloads","numerator":[],"denominator":[],"definition":"Motor miles / mapped public-road length / days","unit":"not yet frozen","role":"candidate","note":"National all-road LSOA exposure remains a Phase 3 dependency. Physical OS road length is not a traffic estimate.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged annual","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://roadtraffic.dft.gov.uk/downloads","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"school_density","label":"Schools near roads","family":"Traffic and activity","source":"https://www.gov.wales/addresses-and-phone-numbers-schools-and-pupil-referral-units","numerator":[],"denominator":[],"definition":"Comparable open schools within fixed road buffer / road km","unit":"not yet frozen","role":"candidate","note":"English GIAS and Welsh school extracts not yet harmonised; categories, dates and road buffer remain to be frozen.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"matched English and Welsh editions","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.gov.wales/addresses-and-phone-numbers-schools-and-pupil-referral-units","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"stop_density","label":"Public transport stops near roads","family":"Traffic and activity","source":"https://www.gov.uk/government/publications/national-public-transport-access-node-schema","numerator":[],"denominator":[],"definition":"Eligible active NaPTAN stops within fixed road buffer / road km","unit":"not yet frozen","role":"candidate","note":"Active stop types, duplicates, access points and buffer rule not yet frozen nationally.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"snapshot at forecast origin","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.gov.uk/government/publications/national-public-transport-access-node-schema","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"snow_lying","label":"Road-weighted snow-lying days","family":"Weather","source":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","numerator":[],"denominator":[],"definition":"Road-length-weighted mean days","unit":"not yet frozen","role":"candidate","note":"Required national snow grid has not been acquired. No proxy snow values are substituted.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged observations or prior climatology","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"heavy_rain","label":"Road-weighted heavy-rain days","family":"Weather","source":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","numerator":[],"denominator":[],"definition":"Road-length-weighted days above prespecified rainfall threshold","unit":"not yet frozen","role":"candidate","note":"Daily rainfall and threshold not frozen; latest CEDA source acquisition remains open.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged daily observations","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"},{"id":"rain_intensity","label":"Road-weighted rainfall intensity","family":"Weather","source":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","numerator":[],"denominator":[],"definition":"Road-length-weighted rainfall","unit":"not yet frozen","role":"candidate","note":"Required rainfall grid not acquired. Same-year explanatory weather must remain distinct from prospective features.","status":"deferred","zeroBand":false,"comparability":"Not established; combined decile withheld","observationPeriod":"lagged observations or prior climatology","direction":"Not assigned","geographicResolution":"LSOA2021, England and Wales","licence":"Expected public-data licence; exact extract terms not yet verified","sourceStatus":"Candidate source identified; national extract not frozen","sourceUrl":"https://www.metoffice.gov.uk/research/climate/maps-and-data/data/haduk-grid/datasets","releasedAt":null,"validCount":0,"missingCount":35672,"bandScheme":"No assignments"}],"statusDefinition":"Complete refers to the frozen calculation and source coverage, not predictive validation. Provisional measures have explicit approximation/coverage limits. Deferred measures have no numeric assignments."}