Built Environment · Evidence Layer
Willows Health · Leicester, UK · FY2026
Pilot · pending VVB
Data Ingestion
Meter feeds, cadence and anomaly control
Sites reporting
4
3 existing + 1 anchor design
Live feeds
4
Elec, gas, invoices, weather
Anomalies open
2
amber
PII stored
None
Meter-level only
Ingestion flow
Smart meters
HH data (elec) · monthly gas
Utility bills
PDF / CSV monthly
Ingestion pipeline
Validate · normalise · seal
Validated store
Reconciled with factors
Evidence layer
Hash-chained artefacts
Feed cadence
| Source | Format | Cadence | Owner | Last received | Status |
|---|---|---|---|---|---|
| Electricity (HH) | CSV | Half-hourly | Cleteco ingest | 2026-07-25 | green |
| Gas | CSV | Monthly | Cleteco ingest | 2026-07-05 | green |
| Utility invoices | Monthly | Willows finance | 2026-07-10 | amber | |
| Weather (HDD/CDD) | API | Daily | Cleteco ingest | 2026-07-25 | green |
Anomaly detection
z-score & degree-day regression residual
2 open flags — none critical. Thresholds: z-score ≥ 1.8 (amber), ≥ 3.0 (red).
| Site | Month | Finding | Method | RAG |
|---|---|---|---|---|
| Clarendon Park Medical Centre | 2025-08 | Cooling spike outside expected HDD envelope | Degree-day regression residual | amber |
| Willows Medical Centre | 2026-02 | Gas usage 1.8σ above baseline for the reporting month | z-score | amber |
File-drop log
| Filename | Site | Type | Received | Status |
|---|---|---|---|---|
| willows_elec_hh_2026-06.csv | Willows Medical Centre | Electricity HH | 2026-07-02 | green |
| heatherbrook_gas_2026-Q2.csv | Heatherbrook Surgery | Gas | 2026-07-05 | green |
| clarendon_invoice_2026-05.pdf | Clarendon Park Medical Centre | Invoice | 2026-07-10 | amber |
| anchor_design_model_v3.xlsx | Leicester New-Build Anchor | Design model | 2026-06-28 | green |
Assumptions & provenance
- Data provenance: meter-level HH data for electricity, monthly gas, monthly utility invoices, daily HDD/CDD weather.
- Half-hourly and monthly figures are reconciled at month-close before sealing.
- Anomaly thresholds: z-score ≥ 1.8 (amber), ≥ 3.0 (red); degree-day regression residuals corroborated cross-source.
- No personally identifiable information is stored; meter identifiers only.
- Figures are pilot inputs pending independent verification; not yet VVB-assured.