Flood Control: Roads
The question
To ask the Secretary of State for Environment, Food and Rural Affairs, what assessment she has made of the relative cost benefit of attenuation ponds compared with repeated flood damage to (a) properties, (b) infrastructure and (c) agricultural land.
Answered by Emma Hardy
Attenuation ponds are deployed by Risk Management Authorities as a flood alleviation measure; they are determined by a range of factors including cost to benefit ratio and the standard of protection that can be achieved. In recent years, the highway sector has been innovative in its use of sustainable drainage and green infrastructure to help manage road flooding.
A new three-year £4.2 billion Flood and Coastal Risk Investment Programme will start in April 2026, where new projects will align with the strategic objectives set out in the Government’s new funding rules announced in October 2025. This means investment goes where it is most needed, accounting for flood risk, value for money, natural flood management opportunity and additional contributions to make Government investment go further. This investment will benefit properties, infrastructure and agriculture.
The Government and the Environment Agency are committed to improving England’s picture of flood and coastal erosion risk, including from surface water. The Environment Agency published its new National Flood Risk Assessment (NaFRA) data in 2025.
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