As hosepipe bans have been imposed (to save water in the heatwave), so Greenpeace have concluded that while banning hosepipe use can save around 4% of water use, this is dwarfed by the approx. 20% *still* lost through leaks in the water infrastructure, which the utilities have been (very) slow to maintain & repair.
So, for customers the inconvenience of a hosepipe ban is a direct result of the money siphoned out of the sector by the privatised water firms.