This winter we plugged the MH into the mains and ran the heating on a low setting over the worst of the winter. Just read our electric meter for the quarter's reading and I was shocked! Hard to say exactly how much it cost but it must have been around £150 - £200. We have a thermometer in the MH and when I checked it was between 9 - 10c in there with the heating on. Could we have had it on lower than that? Is there a better way than using the onboard heater? I'm wondering if gas would have been cheaper as we have Gaslow. Next year we'll probably stay away somewhere warmer - definitely cheaper than heating the house and the MH.