During https://sustainability.thameswater.co.uk/-/media/Site-Content/Corporate-Responsibility/CRS-2017-18/APR/Case-studies/Leaky-loos-and-internal-leaks.pdf https://www.thameswater.co.uk/Be-water-smart/You-can-be-water-smart/Leaky-loos https://sustainability.thameswater.co.uk/-/media/Site-Content/Corporate-Responsibility/CRS-2017-18/APR/Case-studies/Water-efficiency-incentive-scheme-pilot.pdf carried out a trial project delivering around 34,500 water and energy saving visits with London and Quadrant (L&Q) to their residents in London.