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NATIONAL FEATURE REGISTRY · EXPANSION E1–E3 · EW-V2
Explore public-data features across all 35,672 LSOAs. Decile boundaries are fixed nationally, so every local view uses the same scale.
FEATURE PREPARATION · COLLISION EVIDENCE IS A SEPARATE STAGE
E1–E3 adds seven Census features and four connectivity scores, each with complete national coverage. The original 22 measures remain available. Twelve later expansion candidates and the original 16 deferred candidates await their recorded gates.
All 35,672 areas and the original registry are preserved. The combined register reconciles 61 candidates, with sources, definitions, missingness rules and exposure checks.
Vehicle availability, commuting and four transport-accessibility measures use fixed England-and-Wales bands. E4–E7 and the final E8 expansion freeze remain open.
Complete coverage describes the calculation. Census commuting is pandemic-era resident context; connectivity is modelled accessibility. Neither measures actual pedestrian or cyclist flows. The new deciles are research features, with no demonstrated accident or insurer-claims effect.
This milestone provides research inputs, not validated accident-risk indices. The Phase 3 national collision–mileage panel is available with explicit exposure-quality gates. The existing regional mileage pilot does not determine these bands.
ONE SCALE ACROSS BOTH COUNTRIES
Residents aged 16+. Not age-adjusted; age composition is a separate control.
D1 = lowest feature values; D10 = highest. A higher feature decile does not automatically mean higher accident risk. Ties stay together, so band sizes can differ.
Loading the frozen national lookup…
Empirical inverse CDF at 10%..90%; sorted value at ceil(n*p); no interpolation. Display values are rounded; downloads retain full precision. Equality stays in the lower band. Duplicate cut-offs and empty bands are retained.
| Boundary | Upper value of lower band |
|---|---|
| D1 / D2 | 9.55056179775 % |
| D2 / D3 | 12.0805369128 % |
| D3 / D4 | 14.0000000000 % |
| D4 / D5 | 15.8267020336 % |
| D5 / D6 | 17.6767676768 % |
| D6 / D7 | 19.6445275959 % |
| D7 / D8 | 21.9083969466 % |
| D8 / D9 | 24.5937161430 % |
| D9 / D10 | 28.3531409168 % |
Numerator: Highest level of qualification: No qualifications
Denominator: Highest level of qualification: Total: All usual residents aged 16 years and over. Multiplied by 100.
Download full-precision cut-offsCOMPLETE GEOGRAPHY · EXPLICIT FEATURE GAPS
“Complete” describes this source snapshot and calculation. It does not mean the feature predicts accidents. Missing frost coverage and deferred features keep their master rows.
| Feature | Status | England valid | Wales valid | Period / requirement |
|---|---|---|---|---|
| No qualificationsSocio-demographic · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsResidents aged 16+. Not age-adjusted; age composition is a separate control. Source |
| Level 4+ qualificationsSocio-demographic · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsSource |
| Social rented householdsSocio-demographic · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21 |
| Private rented householdsSocio-demographic · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsSource |
| Owner occupied householdsSocio-demographic · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsOwned outright or with mortgage; shared ownership excluded. Tenure shares are dependent. Source |
| Overcrowded householdsSocio-demographic · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21 |
| Unemployment among economically active adultsSocio-demographic · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsIncludes economically active full-time students in numerator and denominator. Census lockdown-era measure. Source |
| Terraced housingHousing and vehicles · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21 |
| Flats and converted/commercial accommodationHousing and vehicles · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsPurpose-built, converted/shared houses, converted buildings and commercial buildings. Not observed garaging. Source |
| Households without a car or vanHousing and vehicles · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21 |
| Cars/vans per household · lower boundHousing and vehicles · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsTop-coded 3+ category is assigned 3. This is a lower bound, not an exact vehicle count. Source |
| Population densityBaseline controls · control | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsSource |
| Residents aged 15–24Baseline controls · control | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21 |
| Residents aged 65+Baseline controls · control | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsSource |
| Residents aged 0–14Baseline controls · control | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsSource |
| Motorway share of mapped road lengthRoad layout · control | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2026-04 |
| A-road share of mapped road lengthRoad layout · control | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2026-04 |
| Minor/local share of mapped road lengthRoad layout · control | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2026-04Definition & limitsB, minor, local and access-road functions, including restricted access. Not traffic-weighted. Source |
| Junctions per mapped road kilometreRoad layout · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2026-04Definition & limitsOS junction nodes only. Pseudo nodes, road ends and roundabout nodes excluded. Source |
| Roundabout nodes per mapped road kilometreRoad layout · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2026-04Definition & limitsOS roundabout node count; zero group plus positive-value deciles. Not a manually audited roundabout inventory. Source |
| Mapped road sinuosityRoad layout · candidate | provisional | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2026-04Definition & limitsLength-weighted full-link length/endpoint distance, excluding closed and roundabout links. Generalised geometry proxy; not bend radius. Source |
| Road-weighted air-frost daysWeather · candidate | provisional | 33,505 / 33,755250 unavailable | 1,860 / 1,91757 unavailable | 1991–2020Definition & limits1991–2020 normal, public 2 km HadUK-Grid v1.1.0.0. At least 99% mapped road coverage. Not road ice or annual 2022–2025 weather. Source |
| Lagged Claimant Count rateSocio-demographic · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | monthly; target forecast origin minus publication lagOutstanding requirementSmall-area series, revisions, definition and matched denominator not yet frozen for both countries. Source |
| 12-month Claimant Count changeSocio-demographic · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | monthly; lagged 12-month changeOutstanding requirementRequires the same comparable claimant series and denominator as claimant_rate. Source |
| Harmonised income deprivationSocio-demographic · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | edition-specificOutstanding requirementEnglish IMD and Welsh WIMD are not comparable. Benefit coverage, denominators and periods are unreconciled. Native ranks are not pooled. Source |
| Harmonised employment deprivationSocio-demographic · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | edition-specificOutstanding requirementCountry-specific constructions unreconciled. Census unemployment is retained as a separate measure, not a replacement deprivation index. Source |
| Road-weighted gradientRoad layout · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | source edition at forecast originOutstanding requirementTerrain grid not acquired or bridge/tunnel treatment validated across both countries. Source |
| Steep-road shareRoad layout · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | source edition at forecast originOutstanding requirementRequires terrain, sampling interval and fixed gradient threshold before calculation. Source |
| HGV traffic shareTraffic and activity · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged annualOutstanding requirementNational all-road LSOA vehicle-class allocation not validated. Existing major-road counts and regional mileage are insufficient. Source |
| Van traffic shareTraffic and activity · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged annualOutstanding requirementSame national all-road vehicle-mix gap; retain counted/estimated flags. Source |
| Motorcycle traffic shareTraffic and activity · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged annualOutstanding requirementSame national all-road vehicle-mix gap; collision-involved vehicles must not supply this feature. Source |
| Bus and coach traffic shareTraffic and activity · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged annual |
| Motor traffic intensityTraffic and activity · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged annualOutstanding requirementNational all-road LSOA exposure remains a Phase 3 dependency. Physical OS road length is not a traffic estimate. Source |
| Schools near roadsTraffic and activity · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | matched English and Welsh editionsOutstanding requirementEnglish GIAS and Welsh school extracts not yet harmonised; categories, dates and road buffer remain to be frozen. Source |
| Public transport stops near roadsTraffic and activity · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | snapshot at forecast originOutstanding requirementActive stop types, duplicates, access points and buffer rule not yet frozen nationally. Source |
| Road-weighted snow-lying daysWeather · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged observations or prior climatologyOutstanding requirementRequired national snow grid has not been acquired. No proxy snow values are substituted. Source |
| Road-weighted heavy-rain daysWeather · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged daily observationsOutstanding requirementDaily rainfall and threshold not frozen; latest CEDA source acquisition remains open. Source |
| Road-weighted rainfall intensityWeather · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | lagged observations or prior climatologyOutstanding requirementRequired rainfall grid not acquired. Same-year explanatory weather must remain distinct from prospective features. Source |
| Households with 2+ cars or vansHousing and vehicles · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21 |
| Households with 3+ cars or vansHousing and vehicles · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21 |
| Car/van driver commuting shareCommuting baseline · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsCensus 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. Source |
| Commutes of 20 km or moreCommuting baseline · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsCensus 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. Source |
| Working mainly at or from homeCommuting baseline · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsCensus 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. Source |
| Walking commuting shareCommuting baseline · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsCensus 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. Source |
| Cycling commuting shareCommuting baseline · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | 2021-03-21Definition & limitsCensus 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. Source |
| Public transport connectivityTransport accessibility · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | Q4 2024 reference; mixed source vintagesDefinition & limitsModelled 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. Source |
| Walking connectivityTransport accessibility · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | Q4 2024 reference; mixed source vintagesDefinition & limitsModelled 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. Source |
| Cycling connectivityTransport accessibility · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | Q4 2024 reference; mixed source vintagesDefinition & limitsModelled 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. Source |
| Driving connectivityTransport accessibility · candidate | complete | 33,755 / 33,7550 unavailable | 1,917 / 1,9170 unavailable | Q4 2024 reference; mixed source vintagesDefinition & limitsModelled 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. Source |
| Road-weighted days ≥25°CWeather · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | 1991–2020 normal; annual 2022–2025 separatelyOutstanding requirementFull calendar and ≥99% road coverage; count hot days before spatial averaging. Source extraction is outside E1–E3; no values assigned. Source |
| Road-weighted days ≥30°CWeather · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | 1991–2020 normal; annual 2022–2025 separatelyOutstanding requirementNested within heat_days_25. Full calendar and ≥99% road coverage. Source extraction is outside E1–E3; no values assigned. Source |
| Road-weighted NO2Air quality · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Annual assessed edition; freeze at E4Outstanding requirementSeparate assessed values from forecasts; ≥99% road coverage; audit 2025 model-method break. Source extraction is outside E1–E3; no values assigned. Source |
| Road-weighted PM2.5Air quality · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Annual assessed edition; freeze at E4Outstanding requirementSeparate assessed values from forecasts; ≥99% road coverage; audit 2025 model-method break. Source extraction is outside E1–E3; no values assigned. Source |
| Vehicle-crime intensityCrime · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Trailing complete 36 months ending before forecast originOutstanding requirementIncludes theft of/from vehicles and interference. Not theft-only. Audit every force-month and anonymised geography; no missing reports as zero. Source extraction is outside E1–E3; no values assigned. Source |
| Burglary intensityCrime · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Trailing complete 36 months ending before forecast originOutstanding requirementPublished burglary category is not wholly residential; coverage and denominator audit required. Source extraction is outside E1–E3; no values assigned. Source |
| Criminal damage and arson intensityCrime · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Trailing complete 36 months ending before forecast originOutstanding requirementCoverage, duplicates and geography audit required; resident denominator is a context proxy. Source extraction is outside E1–E3; no values assigned. Source |
| Non-vehicle recorded-crime intensityCrime · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Trailing complete 36 months ending before forecast originOutstanding requirementOverlaps burglary and damage/arson; handle dependence in joint selection. Source extraction is outside E1–E3; no values assigned. Source |
| Road length at 20 mph or belowSpeed limits · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Dated speed-limit snapshot; freeze at E6Outstanding requirement≥95% classified-length gate; retain unknown length and bounds against all eligible roads. Respect Welsh changes from September 2023. Source extraction is outside E1–E3; no values assigned. Source |
| Road length at 30 mph or belowSpeed limits · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Dated speed-limit snapshot; freeze at E6Outstanding requirementNested speed share; coverage gate and date-specific limits. No speed imputation from collisions. Source extraction is outside E1–E3; no values assigned. Source |
| Bankruptcy rate · authority contextFinancial context · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Lagged annual or three-year window; freeze at E7Outstanding requirementNo within-authority variation. Retain counts and historical mappings. Ties across LSOAs in each authority remain together. Source extraction is outside E1–E3; no values assigned. Source |
| Personal insolvency rate · authority contextFinancial context · candidate | deferred | 0 / 33,75533,755 unavailable | 0 / 1,9171,917 unavailable | Lagged annual or three-year window; freeze at E7Outstanding requirementKeep bankruptcy/IVA/DRO counts separate. Nested bankruptcy measure. LSOA bands weight each authority by its LSOA count; authority sensitivity required. Source extraction is outside E1–E3; no values assigned. Source |
English IMD and Welsh WIMD ranks are not pooled. Harmonised income and employment measures await comparable raw definitions. Overall IMD and living-environment scores are excluded from independent social evidence because they include road-collision information.
FROZEN BEFORE NEW OUTCOME MODELLING
Each LSOA has equal weight. Eligibility uses only source coverage and applicability. Identical values share a band, unavailable values stay missing, and regional views never rerank areas.
Original combined bands remain available if later modelling supports merging neighbouring categories.
Develop on 2022–2023, use 2024 for selection and treat 2025 assessment as exploratory because earlier studies inspected it. Hold out whole English regions and Wales to test geographical transfer.
A fresh period must pass an outcome-access audit before independent confirmation. Insurer claims testing remains separate.
This is a retrospective registry: Census Day 2021, roads April 2026 and frost climatology 1991–2020. Connectivity has a Q4 2024 workbook reference, mixed source vintages and a 29 September 2025 publication date. These national bands were frozen on 12 October 2026. Publication dates differ from observation dates. These inputs cannot all be claimed available at a 2022 forecast origin.
OS roads include mapped private and restricted roads. Length shares and junction density are physical context, not motor-mile exposure. Sinuosity uses generalised geometry. Frost is a prior climate normal, not realised annual weather or measured carriageway ice.
Later collision models need matched all-motor miles and must assess whether features also influence exposure estimation. Location-of-collision features do not establish policyholder-residence risk or causal effects.
The protocol compares a baseline with continuous, smooth and categorical feature alternatives using the same observations and offsets. It records assessment metrics, geographical checks and proposed promotion gates.
EW-V2 · FROZEN 12 OCTOBER 2026
The expansion lookup contains all 35,672 LSOAs and the 23 new candidates, including the 12 deferred candidates. Join it to the unchanged ew-v1 lookup on lsoa for the combined 61-candidate dataset. The E1–E3 bundle reproduces the expansion from archived inputs; the original bundle reproduces ew-v1.
Original 38-candidate lookupOriginal reproduction bundle
| Source | Observation period | Publication / edition | Retrieved |
|---|---|---|---|
| Census 2021 TS001 | 2021-03-21 | 2022-12-13 | 2026-10-10 |
| Census 2021 TS006 | 2021-03-21 | 2022-12-13 | 2026-10-10 |
| Census 2021 TS007A | 2021-03-21 | Not supplied; see archived metadata | 2026-10-12 |
| Census 2021 TS044 | 2021-03-21 | 2023-01-06 | 2026-10-10 |
| Census 2021 TS045 | 2021-03-21 | 2023-01-06 | 2026-10-10 |
| Census 2021 TS052 | 2021-03-21 | 2023-01-06 | 2026-10-12 |
| Census 2021 TS054 | 2021-03-21 | 2023-01-06 | 2026-10-12 |
| Census 2021 TS066 | 2021-03-21 | 2022-12-08 | 2026-10-12 |
| Census 2021 TS067 | 2021-03-21 | 2023-01-10 | 2026-10-12 |
| LSOA2021 to upper-tier authority 2023 | 2021 LSOA / 2023 UTLA | Not supplied; see archived metadata | 2026-10-10 |
| ONS region membership, geography-only extraction | LSOA2021 / UTLA2023 / English regions | Not supplied; see archived metadata | 2026-10-12 |
| Rural Urban Classification (2021) of LSOAs in EW | 2021 | Not supplied; see archived metadata | 2026-10-12 |
| Lower layer Super Output Areas (December 2021) EW Population Weighted Centroids | 2021 | Not supplied; see archived metadata | 2026-10-12 |
| ONS/Nomis Census 2021 TS058 | 2021-03-21 | 2022-12-08 | 2026-10-12 |
| ONS/Nomis Census 2021 TS061 | 2021-03-21 | 2022-12-08 | 2026-10-12 |
| DfT Transport connectivity metric 2025 | Q4 2024 reference; mixed source vintages | 2025-09-29 | 2026-10-12 |
| OS Open Roads April 2026 | April 2026 | Exact source checksum retained | 2026-10-12 |
| ONS LSOA21 EW BFC V10 | LSOA2021 | Exact source checksum retained | 2026-10-12 |
| HadUK-Grid v1.1.0.0; Met Office Climate Data Portal 2 km product | 1991–2020 | Exact source checksum retained | 2026-10-12 |
Contains ONS Census and geography data, DfT connectivity data, OS data © Crown copyright and database right 2026, and Met Office data under the Open Government Licence v3.0. Provenance and checksums are retained. Nomis bulk editions are explicit; no claim is made that they match the latest ONS API revision.