Leccy for us (5 bed bungalow in the worse possible layout for heat retention – think a H shape) is about 150-160 a month + oil. Oil price moves around but I guess we use 2300L a year which is about 1500 quid a year at current prices.
My house is depressingly expensive to heat (and I say heat, what I mean is, keep most of the rooms at 16 degrees!)!