'Savings' Flushed Down the Pan?

The dual-flush system was added to UK toilets with the intention of saving water (something that may well prove progressively more important with time). A report from Waterwise suggests, however, because the system is more likely to leak than the 'old' design (effectively, in many cases, running slowly all day and night), it loses much more water than it saves. They estimate that some 400m litres of water leak from UK toilets each day (https://www.theguardian.com/environment/2020/sep/29/dual-flush-toilets-wasting-more-water-than-they-save). That is an awful lot of water, so the design clearly needs to be improved- pronto! This is especially bad news for people with water meters.