Beavers solving flooding in London

Beavers are back on the scene in the West London suburb of Ealing. The semi-aquatic rodents were reintroduced to a local park by conservationists three years ago - the first time they'd had the privilege of dam and lodge-building in the area in 400 years. In the time since then, the wetland and dam construction have helped with flooding in an area previously assaulted by flooding on a regular basis.