The British experience of beavers is somewhat limited. Most of us haven’t been lucky enough to have spied an immigrant rodent in the wilds of west Devon, or paid a visit to Knapdale and Alyth in Scotland. Instead, we’ve only met beavers in storybooks, notably The Lion, the Witch and the Wardrobe, where in the warm, homely hut of Mr and Mrs Beaver, the Pevensie children are first introduced to the prophecy of Aslan, over fish and potatoes and a sticky marmalade roll.