I turned my mains water off before I left for work. When I got back I had a very unusually long shower (electric) of 25 minutes. After the shower Imtried to brush my teeth and the taps were dry which reminded me the water was turned off.
what on earth is going on? This is definitely the main water supply stop cock. I am so confused.
if it’s relevant I live in a 1920s flat, second floor of three.