Along the 350 miles of the Essex coastline, saltmarshes are a distinctive feature.

Some of them in the estuary of the River Blackwater are thought to be over 35,000 years old.

However the Essex Wildlife Trust say 100 hectares of saltmarsh are being lost around the UK per year.

Lauren Cosson from the Trust showed Owen the saltmarsh that was created at their headquarters in 2002.

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