Complex sentence: Trafford Park was linked to the canal's docks by the standard gauge Manchester Ship Canal Railway, built to service freight to and from the canal's docks and nearby industrial estates, and which connected to the various railway companies that had track near the canal.
Split into simpler sentences: Trafford Park was linked to the canal's docks by the standard gauge Manchester Ship Canal Railway. It was built to service freight to and from the canal's docks and nearby industrial estates, and connected to the various railway companies that had track near the canal.