Complex sentence: Rochdale's cenotaph is among seven Lutyens designed in England which were based on Whitehall's and is among the most ambitious of his designs to come to fruition.
Split into simpler sentences: Rochdale's cenotaph is among seven Lutyens designed in England which were based on Whitehall's. The memorial was among the most ambitious of Lutyens' designs to come to fruition.