This dataset maps flood risk for London taken from the Environment agency's national dataset. Each cell is allocated one of four flood risk categories, taking into account flood defences and their condition. © Environment Agency copyright and/or database right 2017. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH)© Crown copyright and database rights ...

Number of properties in a floodplain and those with a significant risk of flooding. NAFRA - National Flood Risk Assessment. There are 3 risk categories: (i) low - 0.5% (1 in 200) chance of flooding each year or less. (ii) moderate - 1.3% (1 in 75) chance or less but greater than 0.5% (1 in 200) chance in any year. (iii) significant - greater than 1.3% (1 in 75) chance in any year. This dataset was updated in 2008. The GLA are yet ...