Continuity mistake: After Toad avoids James, a works coach moves from in front of the points to behind the points.
Revealing mistake: The rails to the buffers are broken as Toad leaves the siding.
Revealing mistake: When Toad switches lines to avoid Gordon, the track ends in bushes.
Visible crew/equipment: When Toad falls into the pond, in the shot from his point of view, studio equipment can be seen in the top left corner.
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.