"In July, research by Greenpeace UK found that 2.87bn litres of water, enough to fill 1,150 Olympic-sized swimming pools, are lost from leaky pipes in England and Wales every day. "
But sure, let's launch propaganda campaigns telling Muslims to use less water for _wudu_ and Asians to rinse their rice less.
https://www.middleeasteye.net/news/uk-government-advises-muslims-use-less-water-perform-ablutions