The Afternoon Tea Express - S17-E26
Continuity mistake: In the shot of Stephen at the dairy, one of the trucks is in the front and the other one is at the back. But in the shot when Stephen is out and about, the first one is at the far back and the other truck is at the front, but later, the trucks go back to their original positions.
Answer: Butch the breakdown truck must have pulled Gordon's tender all the way up the rails so the breakdown train can reach it and also Butch helped to get Gordon close to the winch.