Since the beginning of December I have been checking my gas/elec usage to see how things are going.
For a flat with two bedrooms, dining room, lounge, bathroom / toilet and kitchen it comes to £2.44 per day, and that includes lighting and cooking. I do not think it's bad considering that, being retired, I am in most of the day.
The central heating is set at at 18ºC min and 21ºC max and is on and off via the timer between 8 am and 5 pm, but I sometimes use it manually on sunny days. In the evening I use an electric convection heater in the lounge when watching TV.
I think the figures are pretty good, though it has been a fairly mild winter, so far.