More than 1,000 properties flooded in London in 2021, resulting in insurance losses of more than £281 million. Record-breaking floods continue to hit the UK.

In the capital, 13% of properties have been classed as having a high or medium risk of flooding. Danger-to-life warnings could soon become a reality, especially for people living in east London on low-lying land next to the river Thames.

Boroughs like Tower Hamlets, Newham and Hackney are built on former marshland. These areas would have originally absorbed water naturally, but have been used for urban development. More than 85% of London marshland was lost during the 20th century. London has lost the natural buffer that used to help water drain away. As the sea level rises and storm surges get more prevalent, chances of flooding are greater.

London is one of the most urbanised cities across the world with 78% of land being urban. With significant impermeable surfaces made of concrete, asphalt and rooftops, water is prevented from draining into the ground. Rapid surface water runoff overwhelms drainage systems and surface water runoff flooding is one of the greatest threats to east London.

Large-scale infrastructure like the Thames Barrier and tidal flood defences protect London from large-scale river flooding, but they cannot prevent surface water flooding from local storms. As........

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