Complex sentence: After four year's work, the river was diverted from its meandering natural course which passed Blacon, Saughall, Shotwick Castle, Burton and Parkgate and up the west shore of Wirral.
Split into simpler sentences: After four year's work, the river was diverted from its natural meandering course. This route passed Blacon, Saughall, Shotwick Castle, Burton and Parkgate and up the west shore of Wirral.