The Mayor of London, Sadiq Khan, launched the Rewild London Fund to help make London a leader in urban rewilding, from restoring rivers to reintroducing species currently absent from the capital. One of them is the beaver and at Paradise Fields in Ealing, just down the road from the busy Greenford tube station, a family of five beavers have just been introduced to their new home by conservationist and vet Dr Sean McCormack. As wildlife biologist and film-maker Dan O'Neil discovers, together they will transform a gritty urban wasteland into a wildlife haven with ecosystem benefits for residents' wellbeing and flood defences
