Most of the washing machine purchasing decisions must be based on the marketing fluff. I don't think there are many publications even on EU level which run and publish comprehensive tests for these machines. Without such objective tests, it is pretty much impossible to base the purchasing decision on hard facts (except those mandated to be reported by EU).
I remember reading that some washing machines actually did not even obey the request to use high temperatures, because the manufacturer had noticed that they can match the EU target for wash efficiency also with lower temperatures. Can't find any reference for this, so take this with a grain of salt.
[1] http://www.topten.eu/uploads/File/130904_Topten_recommendati...
Cape Town will likely be out of water by July 15.
High efficiency dryers and washers have their place; just maybe not where water is prevalent.
The lack of water meters is a legacy thing. Water companies all over the UK (including the North) are trying to migrate consumers away from unmetered tariffs. For example: https://www.nwl.co.uk/your-home/your-account/considering-a-w...
And in case you think the water companies are just as happy if you're on an unmetered tariff: https://www.chroniclelive.co.uk/news/north-east-news/water-m...
The rainy season is starting, and Cape Town is unlikely to run out of water this year. It was touch-and-go until a few months ago, though, and there's still a risk for next year.
My washer is sitting next to the kitchen sink and I just manually add a huge load of water every time I turn that damn thing on. I installed a faucet with a hose just for that reason.