Complex sentence: They enjoyed similar popularity on ex-Great Northern and Great Central territory with engines based at Darnall, Sheffield, regularly rostered for the "Master Cutler" and "South Yorkshireman" expresses.
Split into simpler sentences: They enjoyed similar popularity on ex-Great Northern and Great Central territory. Engines based at Darnall, Sheffield were regularly rostered for the "Master Cutler" and "South Yorkshireman" expresses.