A colony of beavers in Ealing, west London, has played a significant role in reducing flooding near Greenford railway station. Since their reintroduction to the area in 2023, the beavers have constructed multiple dams and formed a lake within the upstream wetlands, effectively slowing the movement of floodwater. This natural intervention has helped mitigate flood risks at the station for three consecutive years.

Beavers had been eradicated from Britain by the 16th century due to hunting, but recent conservation efforts have supported their gradual return. Today, the population of wild beavers in the UK is estimated to be around 3,000, primarily concentrated in Scotland. The presence of these animals in urban and suburban environments such as Ealing demonstrates their potential role in natural flood management strategies.

The continued monitoring of the beaver colony and its impact on local water systems highlights growing interest among environmentalists and urban planners in using natural ecosystems to address flooding challenges.