I am currently staying in one of my rental flats and was suprised when I turned the wall switch to on for the storage heaters they came on even though it was 10pm. I have a key (pay as you go) meter and that has listings for the day rate and the economy 7, although it only shows £3.70 as being used on economy 7. The flat was rewired a few years ago. Before it had the old type fuse boxes with wire, but the storage heaters were on a seperate one. Now everything is in one large box with switches all of which are labeled. From what I have read on google I am wondering if the problem lies with there only being one fuse box. Before I call an electrician in has anyone any ideas on how storage heaters can operate on a fuse box that serves everything and be tripped to go on at the right time.