To drive the Mallard, driver Joseph Duddington would have squeezed the release handle on top of the reverser (D) lever and pushed it forward from the floor. He then would have then opened the cylinder drain cock (L) by turning the valve clockwise. Duddington would then have blown the whistle (C) a couple of times using the whistle handle to announce the train was about to move forward. To start moving, he would have released the brakes (B) using the brake gauge (G). The top lever would have been moved from right to left to release the brakes on the engine and then he would have opened the throttle (A). During the journey, Duddington would have monitored the train using the main boiler pressure gauge (E) and the steam chest pressure gauge (F). The injector steam and boiler water gauges are at (H) and (I), the manifold isolation valve is shown at (J) and the fire hole is pictured at (K)
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