Flood damage costs in England are around £1.1 billion per year. 1 The Environment Agency
has calculated that:
• Around one in six properties in England is at risk of flooding.
• Over 2.4 million properties are at risk of flooding from rivers or the sea in
England, of which nearly half a million are at significant risk.
• One million of these are also vulnerable to surface water flooding with a further
2.8 million properties susceptible to surface water flooding alone.
• 55 per cent living in flood risk areas knew they were at risk and for these three
out of five of them had taken some action to prepare for flooding. 2 3
The challenge posed by flooding could increase in future due to a number of factors. Annual
flood damage costs could exceed £27 billion across the UK by 2080.4 The main factors
include:
• climate change, which could lead to rising sea levels and changes in rainfall;
• ageing drainage and flood defence infrastructure;
• more buildings in flood-prone areas; and
• more paving, which increases the volume of water running off the ground. 5
It has been calculated that spending on flood defences would have to increase by £10-£30
million plus inflation per year to maintain existing levels of flood protection to 2035. 6
Additional funds for surface and groundwater flooding, £150 million a year, would also be
needed. The Environment Agency found that increasing spending by around £20 million
each year would deliver benefits of some £180 billion over the next 100 years.7