Water voles returning to national park in west country after 30 years

150 'Ratty' river creatures to be released in Somerset estate where they had become extinct

One of the most beloved and endangered riverine creatures is returning to a west country national park where it has been extinct for more than three decades.

Over the next few days 150 water voles will be released at six locations in the Aller river on the Holnicote Estate on Exmoor in Somerset.