ENGLAND'S BUCK-TOOTHED TREE KILLERS

    How England's first wild beaver colony has transformed a Devon valley with an intricate drought-proof network of 100ft long dams 13 years after they 'escaped' and started breeding.

   Across almost 100 acres of the Coombeshead Valley, a industrious group of two dozen or more animals have engineered a huge network of 14 pools and dams 13 years after they first 'escaped'.       Wait until the word "transformed" becomes "ruined".