NaFRA Postcode Flood Likelihood Category (FLC) Database is the latest output using the Risk Assessment for flood and coastal defence for System Planning (RASP) High Level Method Plus (HLM+). It is a broad-brush assessment of the likelihood of flooding at a national scale, based on assessments undertaken for 85 river catchments and coastal cells, where a cell is an area of land measuring 50m by 50m.
The NaFRA Postcode Likelihood Category (FLC) Database is held in Microsoft Access format. Although the database can be queried through a user Form where discrete postcodes can be entered, the entire tables underpinning the user Form can be extracted and used as a single dataset with no user locks in place.
The NaFRA Postcode FLC Database provides flood likelihood information at a postcode unit level, summarising the number of properties in each risk category and also the number of properties that are not at risk within that postcode. It enables a comparison of the relative risks and their distribution within each of these postcode units, rather than a detailed, local assessment of the risk at a specific location. The three risk categories are:
The postcodes in the dataset are based on OS MasterMap Address Layer 2 September 2008 and the OS CodePoint November 2008 dataset (Non-Addressable properties).