If you can't heat your bedroom an electric underblanket is great, turn it on 1/2 an hour before you go to bed and turn it off when you get in. It then makes a fleecy insulating layer the rest of the night.
Twinklemegan, we run all our raidiators off the fireplace, as Katymac says they don't blast out heat but warm steadily. We spend a fraction of the cost of LPG. Our system has the option of running the LPG boiler too for mornings or quick blasts of heat.