Diesel Causes Delay is a magazine story.
Diesel is cross that Thomas and Edward are taking passengers while he's shunting. This makes him careless, and one day Thomas finds the trucks are blocking the tracks between Thomas, Annie and Clarabel. Edward helps Thomas with getting the trucks out of the way, and the Fat Controller is pleased with Thomas and Edward's hard work.
- In the third illustration, Thomas is seen pulling Annie and Clarabel when they are meant to be trapped by the trucks.