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GL18 1AP - Flood, Heat, Air & Subsidence Risk - Mitcheldean (GL18)

Forest of Dean, Mitcheldean (GL18)

Flood: LowHeat: MediumAir quality: LowGround: Low

Climate risk summary for GL18 1AP

GL18 1AP in Mitcheldean (GL18) has a Low flood risk - EA NaFRA2 data records 3 properties in a flood risk zone. Heat risk is Medium, with a median (50th percentile) of 27 days above 25°C per year, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario (Met Office UKCP18). Air quality is Low at PM2.5 5.7 μg/m³, above the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are Low risk, with Sandstone geology; shrink-swell risk is classed as improbable (BGS GeoClimate).

How does GL18 1AP compare with the rest of the UK?

  • Air pollution: cleaner than 82% of councils
  • Heat risk: hotter than 63% of councils
  • Subsidence risk: lower risk than 58% of postcodes
  • Green space access: better green access than 75% of English postcodes

What is the flood risk in GL18 1AP?

Flood risk at GL18 1AP is rated Low, based on Environment Agency NaFRA2 modelling.

Environment Agency flood zone data shows low flood risk for GL18 1AP in Mitcheldean (GL18). EA NaFRA2 data shows 3 at low risk in this postcode. The band reflects the highest flood risk within the postcode; some properties within this postcode may face little or no direct flood risk. For a specific property, a conveyancing search will confirm the exact flood zone position.

What is the heat risk in GL18 1AP?

Heat risk at GL18 1AP is rated Medium, reflecting Met Office UKCP18 climate projections (50th percentile) for this area, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario. These are probabilistic projections - the 50th percentile is the central estimate within RCP8.5; the full range of modelled outcomes is wide and lower emissions scenarios would produce lower figures. Higher summer temperatures increase cooling energy costs, affect comfort in poorly insulated or south-facing properties, and can accelerate shrinkage in clay soils beneath foundations. Properties built before 1980 without cavity wall insulation are typically most affected.

How is the air quality in GL18 1AP?

Air quality at GL18 1AP is rated Low, based on Defra UK-AIR annual mean PM2.5 data. Fine particulate matter (PM2.5) comes primarily from road traffic, industry, and domestic burning. Long-term exposure above the WHO guideline of 5 µg/m³ is linked to respiratory and cardiovascular health risks. Buyers and renters in higher air quality risk areas may wish to consider whether the property is near busy roads or industrial sources.

Is subsidence a risk at GL18 1AP?

British Geological Survey data classes the underlying soil at GL18 1AP as Sandstone, with shrink-swell hazard rated improbable (subsidence risk band: Low). A structural survey is the reliable way to assess ground conditions for a specific property.

Where does this data come from?

This LocalRisk report for GL18 1AP draws on four official UK open data sources: Environment Agency NaFRA2 flood modelling, Met Office UKCP18 climate projections, Defra UK-AIR PM2.5 monitoring, and British Geological Survey GeoClimate subsidence mapping. Risk ratings are a screening tool, complementing - not replacing - the searches and surveys ordered as part of a property transaction. Data covers Forest of Dean and is updated as new official datasets are published.

About the Forest of Dean area

Forest of Dean has a largely rural upland setting of woodland, river valleys and former mining areas and experiences cool, wet winters and warm summers, shaped by elevation and complex drainage patterns.

What should buyers and renters check in GL18 1AP?

Practical check: EA flags just 3 properties at flood risk here - check whether this one is among them via a formal flood search. With 27 hot days projected (UKCP18 50th percentile, 2021-2040 average under RCP8.5), note which bedrooms face west (hottest in evening) and whether windows allow through-ventilation. These are postcode-level indicators - conditions vary between individual properties.

Climate risk can change street by street, so it is worth checking neighbouring postcodes too. The full risk report for GL18 1AA is at localrisk.co.uk/postcode/GL181AA, and you can compare GL18 1AP side by side with any UK postcode at localrisk.co.uk/compare.