I walked in the freezing sleet and arrived home wet and uncomfortable. The heating wasn't on because we had turned the water off. When David arrived he informed us that the central heating has it's own supply and that turning the water off didn't affect it. We didn't have to freeze. I thought this was funny in a perverse sort of way...poor MIL has been without heat all day.
Well done David. After a few little trips to Homebase the job was completed and we can all go to the loo now.