POSTCODE AREA CLIMATE RISK
BN7 is a UK postcode district covering part of Wallands Park, Lewes. LocalRisk has flood, heat, air and ground-stability data for 752 postcodes in BN7.
9.7% of postcodes in BN7 fall into the Environment Agency's high flood-risk band - slightly above the UK average of about 7%. The band reflects the highest flood risk within each postcode; some properties may face little or no direct flood risk. Two postcodes a few streets apart can land in different bands; what drives the gap is elevation, distance to the nearest watercourse, and how the surrounding drainage performs in heavy rain. The postcode list below links to the full address-level reading for each postcode in BN7.
Met Office UKCP18 projections (50th percentile) estimate around 25 days above 25°C per year for the area covering BN7, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario. These are probabilistic projections - the full range of modelled outcomes is wide and lower emissions scenarios would produce lower figures.
Annual mean PM2.5 for the council area covering BN7 is 6.3 µg/m³ - above the World Health Organisation guideline of 5 µg/m³. Postcodes within 200 metres of an A-road or major junction routinely run higher during weekday rush hours than residential streets two roads back.
Ground stability in BN7 follows the underlying geology more than the postal boundary. The British Geological Survey GeoSure dataset maps clay shrink-swell risk on a 50-metre cell, and properties on the same street can sit in different bands where a clay seam ends mid-road. A postcode-level check picks up that variation.
Flood risk - postcodes in BN7
Environment Agency NaFRA2 data. Postcode-level. Search below for your exact risk.