Having lived abroad and travelled a great deal, I have always been careful about using water, especially drinking water. It drives me wild to see that useful lessons are not learned and ignored. In Portugal ,when I lived there many years ago,we had a switch , so that "grey" water could be sent into the water butt, rather than down the drain.. from shower or sink. An easy way to save water, yet houses are built here with no thought about such things.
I live alone, and always shower and collect washing up for once a day, rather than using a lot of water to wash up small amounts. Dont use a dishwasher. But part of it is getting british people to think about saving water. I arrived back from living in Syria and was amazed to see good drinking water being allowed to run down the drains as someone washed their car . The combination of more use of such things as dishwashers , and less water available, needs to percolate through our minds, as many have grown up with no water problems. I am old enough to remember the drought in the 1970s, and I think it was asking everyone to save water. Dirty cars were a good sign (windows and registration excepted) and it was a sense of everyone working for the same goal. Now the various problems with private ownership and not enough reservoirs etc ., needs to be seen as a separate thing, but however annoyed we are at various water boards , must not be used as an excuse to ignore the efforts we can all make. If we all make our own efforts to save water it will all add up, and we will know that we have done our best.