I will admit all the homes I have worked on had gas or oil heating, the storage heater we did in collage, and also had one at work to test the bricks with, I was involved in making concrete bonded rather than clay bonded bricks, although 80% of the mixture was iron ore.
It seems we had a dedicated supply to start with using a white meter, but it mean you could not also do ones washing at cheap rate, so latter versions had trigger wires to turn them on, but also simple time clocks have been used, and the one I had to run tests with had no internal timing other than a simple clock manually set to the correct time.
The council flats had a central heat store with fans to distribute the heat when required, they could with fans off keep hot for a week, the water storage was similar, so one could actually control the room temperature, allowing the room to cool over night and get the main part of energy stored in the evening.
However I have only seen the water store used with multi-fuel, with solar panels the power stations are not getting the same demand graphs, and I know France has used maximum demand current as part of their pricing structure for domestic, we only have that for commercial.
It seems E7 can still be got in Scotland, but rest of country you can keep it if you already have it, but you can't move to it.
The smart meter was it seems designed so we could have flexible tariffs, but the grid tie inverter and storage battery means today many people only use power over night anyway. We are adjusting our life style to suit the supply type, however not seen people working night shift, so they can use zero power in their homes over night. But the work from home has resulted in a lot of re-thinking as to how to heat a home used 24/7.
