As you came up the drive you noticed with annoyance that once again the builders didn't seem to be making any progress on your extension. Two of them were sitting on the low wall they'd built, smoking roll-ups. Inside the house, you became aware of the sound of the boiler refilling - a clear sign that a tap had been left running. One of the crew had obviously used the bathroom and left it on. Annoyed again, you climbed th...