I'm moving to a bugalow which has night storage heaters for some years. I've always believed that they were an inefficient, uncontrollable cheap instalation, but the present occupiers say they are cheap to run and no problem ( they would). Obviously I'd judge them myself before doing anything, but do others have any experience before I budget for installing central heating.
I know of 2 owner-occupiers in this housing estate, who have never moved house since the early '60s. They are benefitting from tariffs which are much cheaper than E7, etc. Only one has bothered using modern storage-radiators. The other continues to use old-style under-floor heating, so they cannot fit wall-to-wall carpeting.
You should ask your house-seller, who supplies their electricity, then contact that firm if you can continue on their tariff, after seeing the pence-per-unit figures on their latest bill.