We have storage heaters and use economy 10. The one in the living/dining room is set at 5 and the one in the spare room is on 4. We keep that one on for dressing in the mornings. It comes on between 2am and 7.30am, from 1pm - 3pm and 10pm - 12.30am.
Thats all we have. Nothing in the kitchen, bathroom or bedroom but there is a small one in the hall which we'll switch on when the outside temperatures drop below freezing.
If you have yours on all the time Tilly, could you compromise with OH by switching it off over night and for a few hours during the day in exchange for turning it up a few degrees?