Air quality /point now resolves from a 20m modelled surface inside Greater London (v2.141.0)

Changed

Inside the Greater London LAEI extent, POST /v1/air-quality/point now resolves no2, pm10 and pm25 directly from the 20m modelled annual-mean surface (LAEI 2022) instead of the 1km background cell. The surface already encodes road and source gradients, so the property-decay overlay is not applied on top, avoiding double-counting. Compliance, score, band and DAQI are re-derived from these concentrations.
On a London point response, decay.model returns laei-20m and the response sources list includes LAEI 2022, so you can tell which tier produced the values.
Pollutants the surface does not model (o3 and so2) continue to use the 1km background, keeping a complete pollutant set.
Outside Greater London, behaviour is unchanged: the endpoint still returns the 1km background cell with the decay overlay applied. No request fields change; the LAEI tier is selected automatically by coordinate.

Air quality /point now resolves from a 20m modelled surface inside Greater London