I´ve managed to sort out my broadband but the electricity is driving me nuts, every site offers a different estimated usage (of which i have no idea, because the house hasn´t been lived in for some time, and i´ve been off-grid for years) varying from 300 - 1200 quid!! it seems that either n-power or british gas are cheapest....but if anyone has some spare time on their hands i´d appreciate other´s opinions.
here´s the deal, it´s a 3/4 bed 200 year old mid terrace (postcode sy20 9pr), 2 adults and 2 tinies occupying 2 or 3 bedrooms. No mains gas, storage heaters in all rooms, though I suspect we will use the fireplaces downstairs. currently on scottish power with economy 7 (i have a vague idea what that is, but do i have to use my washing machine etc in the middle of the night to make it worthwhile?....and if anyone can explain how one uses a night storage heater that would be helpful too

i know the sun is shining, but the devil makes work for idle hands ;-)
TIA clara