The first in a 12 part series on making your UK garden future-fit for climate change In a downstairs loo somewhere in East Sussex, there is a brick. Someone's grandmother put it there in the drought of 1976, and it has sat in the cold water of the cistern ever since, slowly shedding grit, quietly doing a little good. It is a fair emblem for how most of us think about saving water: a well-meant gesture, half-remembered, rarely examined, dusted off whenever the reservoirs drop