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Britain's lost 'red river' resurrected, 100 years on

17 October 2013 Last updated at 09:47 BST

More than 9,000 miles of rivers were diverted underground or re-routed as Britain's cities expanded during the Victorian era.

Now the Environment Agency is set to uncover so-called "lost rivers", and return them to the nation.

Ben Moore visits Manchester's Medlock, known for running red, white and blue in the 1800s, but lost for a century.