Acclaimed author Terry Pratchett’s infamous city of Ankh Morpork is under threat from a 60-foot fire- breathing dragon, summoned by a secret society of malcontent tradesmen, in this gleeful adaptation by Stephen Briggs of one of the Discworld science fiction fantasies.

Defending Ankh Morpork against this threat is the entire, underpaid, undervalued City Night Watch – a drunken and world-weary Captain, a cowardly and overweight Sergeant, a small opportunistic Corporal of dubious parentage and their newest recruit, Lance-Constable Carrot, who is upright, literal, law-abiding and keen.

Aiding them in their fight for truth, justice and the Ankh Morporkian way are a small swamp dragon called Errol and the Librarian of Unseen University (who just happens to be an orangutan).

And as they battle their way through life has to go on in the city – even when there’s a dragon at the gates, you still have to get the vegetables in.