Complex sentence: Under Bulleid, a new continental system of numbering was introduced for his own locomotives, based upon his experiences at the French branch of Westinghouse Electric before the First World War, and his tenure in the rail operating department during that conflict.
Split into simpler sentences: Under Bulleid, a new system of numbering was introduced for his own locomotives. Bulleid advocated a continental style of numbering, based upon his experiences at the French branch of Westinghouse Electric before the First World War, and his tenure in the rail operating department during that conflict.