Ours comes on and off with the thermostat, which is set at 18.5 degrees. It comes on for 3.5 hours in the morning 6.5 hours in the evening, depending on the thermostat, of course. It has come on this week.
However this week hasn't been helped by having builders in who were accessing the house via the garage, which meant both garage doors, to the outside and into the house, have been open all day.
Our fuel consmption should fall this winter as we have had a single story extension built, but used the opportunity to get rid of the uninsulated roof of an earlier extension (1966) and put a highly insulated zinc roof over all the extensions. This with the insulated floor and external walls of the new extension, plus double glazing all windows in both extensions should make a significant difference to our fuel consumption.
We can already feel how much more even the heat is and how much longer it stays warm during the day - and we have yet to install the heating in the new build part of the house.