After UK’s hottest summer on record, Ardingly near Haywards Heath is just 19% full – and next-closest reservoir is unusable due to broken treatment works“You can see the water level at Ardingly going down and down. I don’t remember ever seeing it this low,” says Caroline Allan, a lifetime resident of Haywards Heath, the nearest town to one of England’s most depleted reservoirs.The Ardingly reservoir, managed by South