Complex sentence: To aid the drainage, pumping stations were placed to lift the sewage from lower levels into higher pipes; two of the more ornate stations, Abbey Mills in Stratford and Crossness on the Erith Marshes are,, listed for protection by English Heritage.
Split into simpler sentences: To aid the drainage, pumping stations were placed to lift the sewage from lower levels into higher pipes. Two of the more ornate stations, Abbey Mills in Stratford and Crossness on the Erith Marshes are,, listed for protection by English Heritage.