Exploring the London Post Office Railway at the Portal Museum

An underground railway maintenance depot shows a yellow and red shunting train stopped at a platform with yellow safety lines. Overhead, a black sign reads 'SHUNT LOOP CAR SHED' with numbers 5, 6, 8, 10 above it and 'Express' in red. The scene is industrial with exposed pipes, cables, and a tunnel entrance in the background. The overlaid text is the key visual element.

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