katdarn79, if it's of any interest, I'll tell you what my wife and I do with our central heating. There's just the two of us. We have a 3-bed detached bungalow (built 1994), about 270 ft. above sea level, not an exposed position, in Yorkshire. We did an experiment a few years ago and decided that it was more economical to leave the (gas-fired) heating on 24 hrs. a day from mid-October to mid-April than to have it coming on and off twice a day. We don't cook with gas, and we have showers, not baths. From 3. Sep. 2008 to 6. Mar. 2009 we paid £345.52 to Atlantic Electric & Gas for our gas. We control the heating via the wall-mounted room thermostat. During the day, it's set on 18 - 20 degs. Centigrade, at night it goes down to 18 degs. If we go out during the day, we set it on 18 degs. These settings depend on the weather, of course, but these figures are about right for us.