Hi Rob, We have Oil heating in Gloucestershire, the house is 250sq metres and we use about 3500 litres a year. I have reduced it to this from about 4000 with lots of insulation and a programmable thermostat which allows different temps at different times of day/night. I must add that this is a new Grant furnace which is 95% efficient, some old ones are as low as 80%.We are having a new house built in Payrac and this will have electric heating whilst we use it for a holiday home. however we intend to move permanently in 6 years time so I am having the under floor pipes installed in the build and will the have a heat pump fitted as we have a large plot and can easily install the exterior piping.With the ever increasing price of fossil fuels I think that heat pumps are the way to go, also if you install the reversable type you can have air-con too.Something to think about if you are staying put for a good while so as to recoup the initial outly. All the best