Wallasea Island: Man-made nature reserve explained in 60 seconds

One of the largest man-made nature reserves in Essex is being created on Wallasea Island.

Sine 2012, millions of tonnes of earth from London's Crossrail transport project has been brought to the island and landscaped.

More new habitat for wildlife will be created when the sea is allowed to flood in to form new salt marsh.

Gareth George explains the project in 60 seconds.