Swallowing is the reflex in the human body that makes something pass from the mouth, through the esophagus, and to the stomach. If this fails and the object goes through the trachea, then choking occurs.
... William Street tube station[?]
Lord's tube station[?]
Mark Lane tube station[?]
Marlborough Road tube station[?]
North End tube station[?] (aka Bull & Bush; ...