The flows from each homes roof is heavily attenuated at source through a rainwater harvesting SuDS system. Each plot is limited to a discharge rate of 0.1l/s. The system combines controlled attenuation with rainwater harvesting; each homes toilets and washing machines using rainwater, reducing demand and providing further attenuation. Flows from the road and other hard standing areas are held within an oversized pipe within the road and released via a 5l/s vortex control. Pollution is controlled downstream