It's lunchtime and went to wash up my dinner plates - no water coming from the hot tap, same in the bathroom, cold water is fine. There hasn't been any signs of problems. Any ideas?
Ours is a conventional 1921 built house with hot water cyl. heated by either the emersion heater or (as now) the central heating boiler. I'm not sure what you call this system but it is the type that requires one radiator to be permanently on and you can't have the heating on without having the water on as well (I was once told that is significant).