Good april fools there.
Hosepie bans do not affect businesess. Its drought orders that can affect business, and even when under a drought order, only restrictions are applied as the situation gets worse. They very rarely ban busineses for using water alltogether, plus its regional, so if there is a drought order say in surrey but there isnt one in middlesex and you get your water from middlesex because thats where you live then you arnt technically under restrictions, if you bring the water to surrey to work.