Close the doors and curtains upstairs Charleygirl - but I expect you have worked that one out.
Thanks for those figures flicketyb - closed in stoves with fires inside much more efficient?
Time for me to fess up - this year we are in a rented modern (2 years old) first floor flat. One day away from the end of November and we have not had to turn the heating on at all yet. The heat that comes out of the various electrical appliances is more than enough. (Plus possibly neighbours have some heating on, but I kind of doubt it.) Often still having to open windows. So if anyone really wants to cut their fuel bills....