Find The Fault No 42

A lonely double-decker bus plies through the countryside. Probably lost by the look of it. That ground clearance is going to be a bit of a problem when they come to the hump-backed bridge by Maggot's Farm, and if Maggot has had the cows out those white-walled tyres will take a pasting. And what do we think of Bovril? There's always a jar around here somewhere, ready for those frosty mornings just around the corner.