When I first started working at Wallasea it looked an awful lot like a construction site because that's what it was. But just 10 years on, there's no evidence of the diggers or trucks. There's just thousands and thousands of birds who now use it as a refuge, shelter and nursery for their chicks. It's an almost unbelievable transformation.
"It's incredibly transformed," says Emily Mueller De Celis, a landscape architect at the firm Michael Van Valkenburgh Associates, which won a competition to "renaturalize" the area in 2007. "Rather than walking around in and amongst oil refineries and other industry, now you are immersed in nature, walking along the banks of a river with spectacular views back to the city."