Mumbles Railway References Mumbles Railway passenger railway Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Today in History—March 25/ All Aboard History for the First Passenger Railway Launch…would eventually be called the Mumbles Railway, and it would become the longest-running rail line in the world. Read More…would eventually be called the Mumbles Railway, and it would become the longest-running rail line in the world. Read More