My monthly gas bill (not on DD) was paid today (£70.04) so I went to have look at the spreadsheet to see what I am using.
Being a pensioner who is taking strong blood thinners I feel the cold, so I do need heating and warm meals and drinks. I am also in for most of the day, every day. I have turned the radiators down in the rooms I do not use very often and I religiously shut doors when I leave a room.
The CH goes on for an hour when I get up and again at about 5:00 pm. The rest of the time I have a two bar convection heater for the living room / office and hallway. It keeps things at about 20 °C or thereabouts. All curtains get drawn when it is dark. All in all the flat is comfortably warm.
The cost of all this? Well from the 20th of November to the 19th of December my gas and electricity is running at £6.45 on average per day. It was £3.98 per day in Oct to Nov and from the price rise on the 1st of Oct to the 18th it was £3.19 per day. The Energy Credit and Winter Fuel Allowance are paying for most of this.