The image is a timeline of the London Underground train system. It is displayed on a whiteboard in a subway station. The timeline is divided into six sections, each representing a different period of time. 

The first section is titled "1923" and shows a red train on the left side of the board. The second section is labeled "1935" and has a blue arrow pointing to the right side. The third section is labelled "1936" and contains information about the train, including the date, time, and location. The fourth section has an image of a train on it, and the fifth section has a description of the train's history.

At the bottom of the timeline, there is a blue line that runs from the top left corner to the bottom right corner. The line is marked with a dotted line, indicating the direction of the journey. The background of the image is white, and there are no other details or illustrations on the timeline.