What are people spending on average on gas/heating lately?

Do you have it on all day, set to say 20c? or do you turn it up as it gets cold and turn it back off after a set amount of time? We've had 1bath+1shower and heating on for around 6 hours and we've used £4 so far today. Isn't too bad but wouldn't be do-able if the weather was like this all the time.