A band of rabbits must leave their warren to find safety in a film that, even in a digital age, still has the bloody force to scare young minds

‘The field … it’s covered in blood!” This is the young visionary rabbit Fiver, voiced by Richard Briers, in the British animation from 1978 by Martin Rosen, based on Richard Adams’s classic children’s book. The rabbits’ warren, quite as important as Tolkien’s shire, is about to be destroyed by a property development, announced by the humans’ heartless wooden sign, which of course none of the rabbits can read, but twitchy, squirming Fiver can sense the disaster it represents.

So his brother Hazel (voiced by John Hurt) leads Fiver and a breakaway gang on a quest for safety to far-off Watership Down, a rumoured place of sanctuary foreseen by Fiver; they include hot-headed Bigwig (Michael Graham Cox) and later the...