Thanks for the ping, @Chris_OVO
We have been offered free quantum dimplex heaters.
That’s nice of somebody! They’re not cheap, and I hope that selecting the right sizes, installing and configuring them is included in the gift. It’s important to have experts involved, and they don’t usually come cheap.
We don’t know whether your meter is capable of recording usage on separate peak and offpeak registers. I wonder if you could arrange for us to see photos of the meter - a close-up clear enough so the markings and display screen are legible, and an overview of the whole backboard the meter’s mounted on showing all the cables to and from it. You can include photos in a reply here using the Insert image button on the toolbar.
If it comes to light that you’d have to have a new meter, that’s quite easy to arrange. Support can help. If the storage heaters you get are the right size for the rooms they’re in, I would think that Economy 7 (E7) would be a good choice of tariff. Most of your electricity usage will be for heating, and then at offpeak times and rates. E7 usually has the best offpeak rates.
Please come back with pictures of your meter if you can, and we’ll take it from there.