That must either be a mansion or have no insulation, no double glazing, no carpets or maybe its on the top of a hill in Scotland?
My worst heating days last winter (so 22-23) were £5 a day to keep a 4 bed at 19 deg, part insulated and part not...
Top of a hill in Norfolk. Poorly insulated. Honestly looking forward to getting rid of the place but that's up to the executors.
Good for you spending a fiver day.